Raid5 Read Perf drop in 2.6.27

Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

Hello:

I'm benchmarking RAID5 Read performance with 4 disks and notice perf
drop when using kernel 2.6.27.
The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
setup), the perf is 180MB/s/



Some of the tests I have done:
1. I ran  experiments using iozone also but notice that READ perf with
RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
Write perf is similar but Read is an issue.

2. On 2.6.27, I played around with chunk size and blocksize parameters
and got ~5% improvement but not much. I used following cmds:

#mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
/dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
#mke2fs -b 4096 -E stride=8 /dev/md0

#time dd if=/dev/md0 of=/dev/null bs=94208 count=1024


Is this perf drop a known issue? Can someone please recommend some
performance tuning tips?

Thanks a lot for your time and help!

Re: Raid5 Read Perf drop in 2.6.27

[Majed B.]

Are you sure you're using the same Kernel Scheduler on both kernels?

Have you checked and verified that the same drivers are being loaded?
(IDE vs. AHCI -- proprietary drivers vs. open source)

This is interesting!

On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
Study<linuxraid.study@gmail.com> wrote:
> Hello:
>
> I'm benchmarking RAID5 Read performance with 4 disks and notice perf
> drop when using kernel 2.6.27.
> The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
> setup), the perf is 180MB/s/
>
>
>
> Some of the tests I have done:
> 1. I ran  experiments using iozone also but notice that READ perf with
> RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
> Write perf is similar but Read is an issue.
>
> 2. On 2.6.27, I played around with chunk size and blocksize parameters
> and got ~5% improvement but not much. I used following cmds:
>
> #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
> /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
> #mke2fs -b 4096 -E stride=8 /dev/md0
>
> #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>
>
> Is this perf drop a known issue? Can someone please recommend some
> performance tuning tips?
>
> Thanks a lot for your time and help!
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>



-- 
       Majed B.
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Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

Yes - the setup is the same. The only thing that changes is the kernel.

I have 4 HDDs (2 from WD VelociRaptor 150GB/10k RPM and 2 from Seagate
320GB/7.2k RPM).  The HDDs are connected using two Silicon Image SATA
controllers (Sil3132) connected to my host using PCIe.

I use the default kernel scheduling scheme.

Thanks!

On 9/9/09, Majed B. <majedb@gmail.com> wrote:
> Are you sure you're using the same Kernel Scheduler on both kernels?
>
>  Have you checked and verified that the same drivers are being loaded?
>  (IDE vs. AHCI -- proprietary drivers vs. open source)
>
>  This is interesting!
>
>
>  On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>  Study<linuxraid.study@gmail.com> wrote:
>  > Hello:
>  >
>  > I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>  > drop when using kernel 2.6.27.
>  > The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>  > setup), the perf is 180MB/s/
>  >
>  >
>  >
>  > Some of the tests I have done:
>  > 1. I ran  experiments using iozone also but notice that READ perf with
>  > RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>  > Write perf is similar but Read is an issue.
>  >
>  > 2. On 2.6.27, I played around with chunk size and blocksize parameters
>  > and got ~5% improvement but not much. I used following cmds:
>  >
>  > #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>  > /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>  > #mke2fs -b 4096 -E stride=8 /dev/md0
>  >
>  > #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>  >
>  >
>  > Is this perf drop a known issue? Can someone please recommend some
>  > performance tuning tips?
>  >
>  > Thanks a lot for your time and help!
>
> > --
>  > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>  > the body of a message to majordomo@vger.kernel.org
>  > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>  >
>
>
>
>  --
>
>        Majed B.
>

Re: Raid5 Read Perf drop in 2.6.27

[Majed B.]

Well, that's my point. To make sure that your kernels are identical in
options, compare the .config files found in /usr/src/linux-<version>

You may find changes and differences in areas like bluetooth,
wireless, ...etc. These don't matter.

Did you compile your own kernel, or are you using one compiled for a
specific distro?

On Thu, Sep 10, 2009 at 4:17 AM, Linux Raid
Study<linuxraid.study@gmail.com> wrote:
> Yes - the setup is the same. The only thing that changes is the kernel.
>
> I have 4 HDDs (2 from WD VelociRaptor 150GB/10k RPM and 2 from Seagate
> 320GB/7.2k RPM).  The HDDs are connected using two Silicon Image SATA
> controllers (Sil3132) connected to my host using PCIe.
>
> I use the default kernel scheduling scheme.
>
> Thanks!
>
> On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>> Are you sure you're using the same Kernel Scheduler on both kernels?
>>
>>  Have you checked and verified that the same drivers are being loaded?
>>  (IDE vs. AHCI -- proprietary drivers vs. open source)
>>
>>  This is interesting!
>>
>>
>>  On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>>  Study<linuxraid.study@gmail.com> wrote:
>>  > Hello:
>>  >
>>  > I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>>  > drop when using kernel 2.6.27.
>>  > The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>>  > setup), the perf is 180MB/s/
>>  >
>>  >
>>  >
>>  > Some of the tests I have done:
>>  > 1. I ran  experiments using iozone also but notice that READ perf with
>>  > RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>>  > Write perf is similar but Read is an issue.
>>  >
>>  > 2. On 2.6.27, I played around with chunk size and blocksize parameters
>>  > and got ~5% improvement but not much. I used following cmds:
>>  >
>>  > #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>>  > /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>>  > #mke2fs -b 4096 -E stride=8 /dev/md0
>>  >
>>  > #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>  >
>>  >
>>  > Is this perf drop a known issue? Can someone please recommend some
>>  > performance tuning tips?
>>  >
>>  > Thanks a lot for your time and help!
>>
>> > --
>>  > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>  > the body of a message to majordomo@vger.kernel.org
>>  > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>  >
>>
>>
>>
>>  --
>>
>>        Majed B.
>>
>



-- 
       Majed B.
--
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Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

I build/compile my own kernel..

Have you done any benchmarks for Read RAID5 perf?

Thanks!

On 9/9/09, Majed B. <majedb@gmail.com> wrote:
> Well, that's my point. To make sure that your kernels are identical in
>  options, compare the .config files found in /usr/src/linux-<version>
>
>  You may find changes and differences in areas like bluetooth,
>  wireless, ...etc. These don't matter.
>
>  Did you compile your own kernel, or are you using one compiled for a
>  specific distro?
>
>  On Thu, Sep 10, 2009 at 4:17 AM, Linux Raid
>
> Study<linuxraid.study@gmail.com> wrote:
>  > Yes - the setup is the same. The only thing that changes is the kernel.
>  >
>  > I have 4 HDDs (2 from WD VelociRaptor 150GB/10k RPM and 2 from Seagate
>  > 320GB/7.2k RPM).  The HDDs are connected using two Silicon Image SATA
>  > controllers (Sil3132) connected to my host using PCIe.
>  >
>  > I use the default kernel scheduling scheme.
>  >
>  > Thanks!
>  >
>  > On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>  >> Are you sure you're using the same Kernel Scheduler on both kernels?
>  >>
>  >>  Have you checked and verified that the same drivers are being loaded?
>  >>  (IDE vs. AHCI -- proprietary drivers vs. open source)
>  >>
>  >>  This is interesting!
>  >>
>  >>
>  >>  On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>  >>  Study<linuxraid.study@gmail.com> wrote:
>  >>  > Hello:
>  >>  >
>  >>  > I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>  >>  > drop when using kernel 2.6.27.
>  >>  > The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>  >>  > setup), the perf is 180MB/s/
>  >>  >
>  >>  >
>  >>  >
>  >>  > Some of the tests I have done:
>  >>  > 1. I ran  experiments using iozone also but notice that READ perf with
>  >>  > RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>  >>  > Write perf is similar but Read is an issue.
>  >>  >
>  >>  > 2. On 2.6.27, I played around with chunk size and blocksize parameters
>  >>  > and got ~5% improvement but not much. I used following cmds:
>  >>  >
>  >>  > #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>  >>  > /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>  >>  > #mke2fs -b 4096 -E stride=8 /dev/md0
>  >>  >
>  >>  > #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>  >>  >
>  >>  >
>  >>  > Is this perf drop a known issue? Can someone please recommend some
>  >>  > performance tuning tips?
>  >>  >
>  >>  > Thanks a lot for your time and help!
>  >>
>  >> > --
>  >>  > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>  >>  > the body of a message to majordomo@vger.kernel.org
>  >>  > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>  >>  >
>  >>
>  >>
>  >>
>  >>  --
>  >>
>  >>        Majed B.
>  >>
>  >
>
>
>
>
> --
>
>        Majed B.
>

Re: Raid5 Read Perf drop in 2.6.27

[Majed B.]

I did a quick test a few days back:
http://mbhtech.blogspot.com/2009/09/software-raid-vs-lvm-quick-speed-test_08.html

That was run on an Ubuntu Server machine with running kernel:
2.6.28-15-server #49-Ubuntu SMP
Unfortunately I don't have access to the machine now, so I can't
attach the kernel's .config file.

On Thu, Sep 10, 2009 at 4:45 AM, Linux Raid
Study<linuxraid.study@gmail.com> wrote:
> I build/compile my own kernel..
>
> Have you done any benchmarks for Read RAID5 perf?
>
> Thanks!
>
> On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>> Well, that's my point. To make sure that your kernels are identical in
>>  options, compare the .config files found in /usr/src/linux-<version>
>>
>>  You may find changes and differences in areas like bluetooth,
>>  wireless, ...etc. These don't matter.
>>
>>  Did you compile your own kernel, or are you using one compiled for a
>>  specific distro?
-- 
       Majed B.
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
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Re: Raid5 Read Perf drop in 2.6.27

[Keld Jørn Simonsen]

Hi

There is some data on raid5 performance (and other raid types) at our
wiki at: http://linux-raid.osdl.org/index.php/Performance

When you have something you want to share with others, then we can add
your info to the data there, either by a URL or by direct inclusion in
the wiki.

best regards
keld

On Wed, Sep 09, 2009 at 06:45:31PM -0700, Linux Raid Study wrote:
> I build/compile my own kernel..
> 
> Have you done any benchmarks for Read RAID5 perf?
> 
> Thanks!
> 
> On 9/9/09, Majed B. <majedb@gmail.com> wrote:
> > Well, that's my point. To make sure that your kernels are identical in
> >  options, compare the .config files found in /usr/src/linux-<version>
> >
> >  You may find changes and differences in areas like bluetooth,
> >  wireless, ...etc. These don't matter.
> >
> >  Did you compile your own kernel, or are you using one compiled for a
> >  specific distro?
> >
> >  On Thu, Sep 10, 2009 at 4:17 AM, Linux Raid
> >
> > Study<linuxraid.study@gmail.com> wrote:
> >  > Yes - the setup is the same. The only thing that changes is the kernel.
> >  >
> >  > I have 4 HDDs (2 from WD VelociRaptor 150GB/10k RPM and 2 from Seagate
> >  > 320GB/7.2k RPM).  The HDDs are connected using two Silicon Image SATA
> >  > controllers (Sil3132) connected to my host using PCIe.
> >  >
> >  > I use the default kernel scheduling scheme.
> >  >
> >  > Thanks!
> >  >
> >  > On 9/9/09, Majed B. <majedb@gmail.com> wrote:
> >  >> Are you sure you're using the same Kernel Scheduler on both kernels?
> >  >>
> >  >>  Have you checked and verified that the same drivers are being loaded?
> >  >>  (IDE vs. AHCI -- proprietary drivers vs. open source)
> >  >>
> >  >>  This is interesting!
> >  >>
> >  >>
> >  >>  On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
> >  >>  Study<linuxraid.study@gmail.com> wrote:
> >  >>  > Hello:
> >  >>  >
> >  >>  > I'm benchmarking RAID5 Read performance with 4 disks and notice perf
> >  >>  > drop when using kernel 2.6.27.
> >  >>  > The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
> >  >>  > setup), the perf is 180MB/s/
> >  >>  >
> >  >>  >
> >  >>  >
> >  >>  > Some of the tests I have done:
> >  >>  > 1. I ran  experiments using iozone also but notice that READ perf with
> >  >>  > RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
> >  >>  > Write perf is similar but Read is an issue.
> >  >>  >
> >  >>  > 2. On 2.6.27, I played around with chunk size and blocksize parameters
> >  >>  > and got ~5% improvement but not much. I used following cmds:
> >  >>  >
> >  >>  > #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
> >  >>  > /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
> >  >>  > #mke2fs -b 4096 -E stride=8 /dev/md0
> >  >>  >
> >  >>  > #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
> >  >>  >
> >  >>  >
> >  >>  > Is this perf drop a known issue? Can someone please recommend some
> >  >>  > performance tuning tips?
> >  >>  >
> >  >>  > Thanks a lot for your time and help!
> >  >>
> >  >> > --
> >  >>  > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> >  >>  > the body of a message to majordomo@vger.kernel.org
> >  >>  > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >  >>  >
> >  >>
> >  >>
> >  >>
> >  >>  --
> >  >>
> >  >>        Majed B.
> >  >>
> >  >
> >
> >
> >
> >
> > --
> >
> >        Majed B.
> >
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

Hello:

According to Wiki at http://linux-raid.osdl.org/index.php/Performance,
disabling NCQ helps in improving perf....I thought enabling
command-queuing helps is perf improvement. Can someone pls elaborate
how disabling NCQ helps....

I have 3 seagate HDDs (7200RPM) and 2 WD VelcoiRaptor (10k RPM) and
disabling NCQ doesn't help in performance....

thanks!

[ snip from wiki ]

# Disable NCQ on all disks. (for raptors it increases the speed 30-40MiB/s)
echo "Disabling NCQ on all disks..."
for i in $DISKS
do
  echo "Disabling NCQ on $i"
  echo 1 > /sys/block/"$i"/device/queue_depth
done

2009/9/10 Keld Jørn Simonsen <keld@dkuug.dk>:
> Hi
>
> There is some data on raid5 performance (and other raid types) at our
> wiki at: http://linux-raid.osdl.org/index.php/Performance
>
> When you have something you want to share with others, then we can add
> your info to the data there, either by a URL or by direct inclusion in
> the wiki.
>
> best regards
> keld
>
> On Wed, Sep 09, 2009 at 06:45:31PM -0700, Linux Raid Study wrote:
>> I build/compile my own kernel..
>>
>> Have you done any benchmarks for Read RAID5 perf?
>>
>> Thanks!
>>
>> On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>> > Well, that's my point. To make sure that your kernels are identical in
>> >  options, compare the .config files found in /usr/src/linux-<version>
>> >
>> >  You may find changes and differences in areas like bluetooth,
>> >  wireless, ...etc. These don't matter.
>> >
>> >  Did you compile your own kernel, or are you using one compiled for a
>> >  specific distro?
>> >
>> >  On Thu, Sep 10, 2009 at 4:17 AM, Linux Raid
>> >
>> > Study<linuxraid.study@gmail.com> wrote:
>> >  > Yes - the setup is the same. The only thing that changes is the kernel.
>> >  >
>> >  > I have 4 HDDs (2 from WD VelociRaptor 150GB/10k RPM and 2 from Seagate
>> >  > 320GB/7.2k RPM).  The HDDs are connected using two Silicon Image SATA
>> >  > controllers (Sil3132) connected to my host using PCIe.
>> >  >
>> >  > I use the default kernel scheduling scheme.
>> >  >
>> >  > Thanks!
>> >  >
>> >  > On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>> >  >> Are you sure you're using the same Kernel Scheduler on both kernels?
>> >  >>
>> >  >>  Have you checked and verified that the same drivers are being loaded?
>> >  >>  (IDE vs. AHCI -- proprietary drivers vs. open source)
>> >  >>
>> >  >>  This is interesting!
>> >  >>
>> >  >>
>> >  >>  On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>> >  >>  Study<linuxraid.study@gmail.com> wrote:
>> >  >>  > Hello:
>> >  >>  >
>> >  >>  > I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>> >  >>  > drop when using kernel 2.6.27.
>> >  >>  > The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>> >  >>  > setup), the perf is 180MB/s/
>> >  >>  >
>> >  >>  >
>> >  >>  >
>> >  >>  > Some of the tests I have done:
>> >  >>  > 1. I ran  experiments using iozone also but notice that READ perf with
>> >  >>  > RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>> >  >>  > Write perf is similar but Read is an issue.
>> >  >>  >
>> >  >>  > 2. On 2.6.27, I played around with chunk size and blocksize parameters
>> >  >>  > and got ~5% improvement but not much. I used following cmds:
>> >  >>  >
>> >  >>  > #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>> >  >>  > /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>> >  >>  > #mke2fs -b 4096 -E stride=8 /dev/md0
>> >  >>  >
>> >  >>  > #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>> >  >>  >
>> >  >>  >
>> >  >>  > Is this perf drop a known issue? Can someone please recommend some
>> >  >>  > performance tuning tips?
>> >  >>  >
>> >  >>  > Thanks a lot for your time and help!
>> >  >>
>> >  >> > --
>> >  >>  > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> >  >>  > the body of a message to majordomo@vger.kernel.org
>> >  >>  > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> >  >>  >
>> >  >>
>> >  >>
>> >  >>
>> >  >>  --
>> >  >>
>> >  >>        Majed B.
>> >  >>
>> >  >
>> >
>> >
>> >
>> >
>> > --
>> >
>> >        Majed B.
>> >
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
--
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the body of a message to majordomo@vger.kernel.org
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Re: Raid5 Read Perf drop in 2.6.27

[Greg Freemyer]

2009/9/10 Linux Raid Study <linuxraid.study@gmail.com>:
> Hello:
>
> According to Wiki at http://linux-raid.osdl.org/index.php/Performance,
> disabling NCQ helps in improving perf....I thought enabling
> command-queuing helps is perf improvement. Can someone pls elaborate
> how disabling NCQ helps....
>
> I have 3 seagate HDDs (7200RPM) and 2 WD VelcoiRaptor (10k RPM) and
> disabling NCQ doesn't help in performance....
>
> thanks!

First, you are familiar with what NCQ is, right?

http://en.wikipedia.org/wiki/Native_Command_Queuing

So, the linux kernel has extremely good elevator sorting algorithms of its own.

So if the data is sent to the drive in the optimum order to reduce
disk seeks, any additional sorting the disk does can result in
unneeded overhead.

So it comes down to the disks sorting characteristics.  If they are
top-end and thus better than the kernel does, then NCQ helps.  If
low-end and thus worse than the kernel does, then it hurts.

Or so I understand it.

Greg

Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

Hi:

I tried to change the Raid5 stripe cache size by doing
"echo  262144 > /sys/block/md0/md/stripe_cache_size"
But if I do "cat /sys/block/md0/md/stripe_cache_size", it still shows 1024!

Can someone please suggest how to increase stripe cache size?

thanks!


2009/9/10 Keld Jørn Simonsen <keld@dkuug.dk>:
> Hi
>
> There is some data on raid5 performance (and other raid types) at our
> wiki at: http://linux-raid.osdl.org/index.php/Performance
>
> When you have something you want to share with others, then we can add
> your info to the data there, either by a URL or by direct inclusion in
> the wiki.
>
> best regards
> keld
>
> On Wed, Sep 09, 2009 at 06:45:31PM -0700, Linux Raid Study wrote:
>> I build/compile my own kernel..
>>
>> Have you done any benchmarks for Read RAID5 perf?
>>
>> Thanks!
>>
>> On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>> > Well, that's my point. To make sure that your kernels are identical in
>> >  options, compare the .config files found in /usr/src/linux-<version>
>> >
>> >  You may find changes and differences in areas like bluetooth,
>> >  wireless, ...etc. These don't matter.
>> >
>> >  Did you compile your own kernel, or are you using one compiled for a
>> >  specific distro?
>> >
>> >  On Thu, Sep 10, 2009 at 4:17 AM, Linux Raid
>> >
>> > Study<linuxraid.study@gmail.com> wrote:
>> >  > Yes - the setup is the same. The only thing that changes is the kernel.
>> >  >
>> >  > I have 4 HDDs (2 from WD VelociRaptor 150GB/10k RPM and 2 from Seagate
>> >  > 320GB/7.2k RPM).  The HDDs are connected using two Silicon Image SATA
>> >  > controllers (Sil3132) connected to my host using PCIe.
>> >  >
>> >  > I use the default kernel scheduling scheme.
>> >  >
>> >  > Thanks!
>> >  >
>> >  > On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>> >  >> Are you sure you're using the same Kernel Scheduler on both kernels?
>> >  >>
>> >  >>  Have you checked and verified that the same drivers are being loaded?
>> >  >>  (IDE vs. AHCI -- proprietary drivers vs. open source)
>> >  >>
>> >  >>  This is interesting!
>> >  >>
>> >  >>
>> >  >>  On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>> >  >>  Study<linuxraid.study@gmail.com> wrote:
>> >  >>  > Hello:
>> >  >>  >
>> >  >>  > I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>> >  >>  > drop when using kernel 2.6.27.
>> >  >>  > The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>> >  >>  > setup), the perf is 180MB/s/
>> >  >>  >
>> >  >>  >
>> >  >>  >
>> >  >>  > Some of the tests I have done:
>> >  >>  > 1. I ran  experiments using iozone also but notice that READ perf with
>> >  >>  > RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>> >  >>  > Write perf is similar but Read is an issue.
>> >  >>  >
>> >  >>  > 2. On 2.6.27, I played around with chunk size and blocksize parameters
>> >  >>  > and got ~5% improvement but not much. I used following cmds:
>> >  >>  >
>> >  >>  > #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>> >  >>  > /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>> >  >>  > #mke2fs -b 4096 -E stride=8 /dev/md0
>> >  >>  >
>> >  >>  > #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>> >  >>  >
>> >  >>  >
>> >  >>  > Is this perf drop a known issue? Can someone please recommend some
>> >  >>  > performance tuning tips?
>> >  >>  >
>> >  >>  > Thanks a lot for your time and help!
>> >  >>
>> >  >> > --
>> >  >>  > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> >  >>  > the body of a message to majordomo@vger.kernel.org
>> >  >>  > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> >  >>  >
>> >  >>
>> >  >>
>> >  >>
>> >  >>  --
>> >  >>
>> >  >>        Majed B.
>> >  >>
>> >  >
>> >
>> >
>> >
>> >
>> > --
>> >
>> >        Majed B.
>> >
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Raid5 Read Perf drop in 2.6.27

[Majed B.]

[-- Attachment #1: Type: text/plain, Size: 4826 bytes --]

Attached is the diff file between the config files of kernels 21 & 27.

I see a lot of DMA changes and schedulers.

I've asked you before if you compiled your own kernel or do you use
unmodified distro kernels?

If you compile your own, then you could import the 21 config to the 27
compile process and then compare the performance of the two kernels.

2009/9/17 Linux Raid Study <linuxraid.study@gmail.com>:
> Hi:
>
> I tried to change the Raid5 stripe cache size by doing
> "echo  262144 > /sys/block/md0/md/stripe_cache_size"
> But if I do "cat /sys/block/md0/md/stripe_cache_size", it still shows 1024!
>
> Can someone please suggest how to increase stripe cache size?
>
> thanks!
>
>
> 2009/9/10 Keld Jørn Simonsen <keld@dkuug.dk>:
>> Hi
>>
>> There is some data on raid5 performance (and other raid types) at our
>> wiki at: http://linux-raid.osdl.org/index.php/Performance
>>
>> When you have something you want to share with others, then we can add
>> your info to the data there, either by a URL or by direct inclusion in
>> the wiki.
>>
>> best regards
>> keld
>>
>> On Wed, Sep 09, 2009 at 06:45:31PM -0700, Linux Raid Study wrote:
>>> I build/compile my own kernel..
>>>
>>> Have you done any benchmarks for Read RAID5 perf?
>>>
>>> Thanks!
>>>
>>> On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>>> > Well, that's my point. To make sure that your kernels are identical in
>>> >  options, compare the .config files found in /usr/src/linux-<version>
>>> >
>>> >  You may find changes and differences in areas like bluetooth,
>>> >  wireless, ...etc. These don't matter.
>>> >
>>> >  Did you compile your own kernel, or are you using one compiled for a
>>> >  specific distro?
>>> >
>>> >  On Thu, Sep 10, 2009 at 4:17 AM, Linux Raid
>>> >
>>> > Study<linuxraid.study@gmail.com> wrote:
>>> >  > Yes - the setup is the same. The only thing that changes is the kernel.
>>> >  >
>>> >  > I have 4 HDDs (2 from WD VelociRaptor 150GB/10k RPM and 2 from Seagate
>>> >  > 320GB/7.2k RPM).  The HDDs are connected using two Silicon Image SATA
>>> >  > controllers (Sil3132) connected to my host using PCIe.
>>> >  >
>>> >  > I use the default kernel scheduling scheme.
>>> >  >
>>> >  > Thanks!
>>> >  >
>>> >  > On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>>> >  >> Are you sure you're using the same Kernel Scheduler on both kernels?
>>> >  >>
>>> >  >>  Have you checked and verified that the same drivers are being loaded?
>>> >  >>  (IDE vs. AHCI -- proprietary drivers vs. open source)
>>> >  >>
>>> >  >>  This is interesting!
>>> >  >>
>>> >  >>
>>> >  >>  On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>>> >  >>  Study<linuxraid.study@gmail.com> wrote:
>>> >  >>  > Hello:
>>> >  >>  >
>>> >  >>  > I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>>> >  >>  > drop when using kernel 2.6.27.
>>> >  >>  > The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>>> >  >>  > setup), the perf is 180MB/s/
>>> >  >>  >
>>> >  >>  >
>>> >  >>  >
>>> >  >>  > Some of the tests I have done:
>>> >  >>  > 1. I ran  experiments using iozone also but notice that READ perf with
>>> >  >>  > RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>>> >  >>  > Write perf is similar but Read is an issue.
>>> >  >>  >
>>> >  >>  > 2. On 2.6.27, I played around with chunk size and blocksize parameters
>>> >  >>  > and got ~5% improvement but not much. I used following cmds:
>>> >  >>  >
>>> >  >>  > #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>>> >  >>  > /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>>> >  >>  > #mke2fs -b 4096 -E stride=8 /dev/md0
>>> >  >>  >
>>> >  >>  > #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>> >  >>  >
>>> >  >>  >
>>> >  >>  > Is this perf drop a known issue? Can someone please recommend some
>>> >  >>  > performance tuning tips?
>>> >  >>  >
>>> >  >>  > Thanks a lot for your time and help!
>>> >  >>
>>> >  >> > --
>>> >  >>  > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>> >  >>  > the body of a message to majordomo@vger.kernel.org
>>> >  >>  > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>> >  >>  >
>>> >  >>
>>> >  >>
>>> >  >>
>>> >  >>  --
>>> >  >>
>>> >  >>        Majed B.
>>> >  >>
>>> >  >
>>> >
>>> >
>>> >
>>> >
>>> > --
>>> >
>>> >        Majed B.
>>> >
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>



-- 
       Majed B.

[-- Attachment #2: diff.diff --]
[-- Type: text/x-diff, Size: 8213 bytes --]

--- 21	2009-09-17 05:50:44.091089881 +0300
+++ u	2009-09-17 06:31:01.532090560 +0300
@@ -1,21 +1,30 @@
 CONFIG_64BIT=y
+CONFIG_64BIT_PHYS_ADDR=y
 CONFIG_8139TOO=y
 CONFIG_8139TOO_PIO=y
+CONFIG_ANON_INODES=y
 CONFIG_ARCH_FLATMEM_ENABLE=y
 CONFIG_ARCH_MAY_HAVE_PC_FDC=y
+CONFIG_ARCH_POPULATES_NODE_MAP=y
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
+CONFIG_ARCH_SUPPORTS_OPROFILE=y
 CONFIG_ASYNC_CORE=y
 CONFIG_ASYNC_MEMCPY=y
+CONFIG_ASYNC_PQ=y
 CONFIG_ASYNC_PQXOR=y
 CONFIG_ASYNC_R6RECOV=y
+CONFIG_ASYNC_RAID6_RECOV=y
 CONFIG_ASYNC_XOR=y
 CONFIG_ATA=y
+CONFIG_ATA_SFF=y
 CONFIG_BASE_FULL=y
 CONFIG_BINFMT_ELF32=y
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=y
 CONFIG_BITREVERSE=y
+CONFIG_BLK_DEV=y
 CONFIG_BLK_DEV_CMD64X=y
+CONFIG_BLK_DEV_DM=y
 CONFIG_BLK_DEV_IDE=y
 CONFIG_BLK_DEV_IDECD=y
 CONFIG_BLK_DEV_IDEDISK=y
@@ -29,11 +38,18 @@
 CONFIG_BLK_DEV_SD=y
 CONFIG_BLK_DEV_VIA82CXXX=y
 CONFIG_BLOCK=y
+CONFIG_BLOCK_COMPAT=y
+CONFIG_BOUNCE=y
 CONFIG_BRIDGE=y
 CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_BSD_PROCESS_ACCT_V3=y
 CONFIG_BUG=y
 CONFIG_BUILD_ELF64=y
+CONFIG_BUILD_ID_DISABLE=y
+CONFIG_CEVT_R4K=y
+CONFIG_CLASSIC_RCU=y
 CONFIG_COMPAT=y
+CONFIG_COMPAT_BRK=y
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_CPU_HAS_PREFETCH=y
 CONFIG_CPU_HAS_SYNC=y
@@ -45,27 +61,46 @@
 CONFIG_CRC32=y
 CONFIG_CRYPTO=y
 CONFIG_CRYPTO_ALGAPI=y
+CONFIG_CRYPTO_BLKCIPHER=y
+CONFIG_CRYPTO_CBC=y
+CONFIG_CRYPTO_DES=y
 CONFIG_CRYPTO_HASH=y
 CONFIG_CRYPTO_HMAC=y
+CONFIG_CRYPTO_HW=y
 CONFIG_CRYPTO_MANAGER=y
+CONFIG_CRYPTO_MD5=y
 CONFIG_DEBUG_INFO=y
 CONFIG_DEBUG_KERNEL=y
 CONFIG_DEFAULT_CFQ=y
+CONFIG_DEVKMEM=y
+CONFIG_DEVPORT=y
+CONFIG_DMADEVICES=y
 CONFIG_DMA_ENGINE=y
+CONFIG_DM_CRYPT=y
+CONFIG_DM_MIRROR=y
+CONFIG_DM_SNAPSHOT=y
+CONFIG_DM_ZERO=y
 CONFIG_DNOTIFY=y
 CONFIG_DRM=y
 CONFIG_DRM_RADEON=y
 CONFIG_DUMMY_CONSOLE=y
 CONFIG_E1000=y
+CONFIG_E1000E=y
 CONFIG_E1000_NAPI=y
 CONFIG_ELF_CORE=y
 CONFIG_EMBEDDED=y
 CONFIG_ENABLE_MUST_CHECK=y
+CONFIG_ENABLE_WARN_DEPRECATED=y
 CONFIG_EPOLL=y
+CONFIG_EVENTFD=y
 CONFIG_EXPERIMENTAL=y
 CONFIG_EXT2_FS=y
+CONFIG_EXT2_FS_POSIX_ACL=y
+CONFIG_EXT2_FS_XATTR=y
 CONFIG_EXT3_FS=y
+CONFIG_EXT3_FS_POSIX_ACL=y
 CONFIG_EXT3_FS_XATTR=y
+CONFIG_FAIR_GROUP_SCHED=y
 CONFIG_FAST_ACCESS_TO_THREAD_POINTER=y
 CONFIG_FAT_FS=y
 CONFIG_FB=y
@@ -81,32 +116,55 @@
 CONFIG_FORCED_INLINING=y
 CONFIG_FRAMEBUFFER_CONSOLE=y
 CONFIG_FS_MBCACHE=y
+CONFIG_FS_POSIX_ACL=y
 CONFIG_FUSION=y
 CONFIG_FUSION_SAS=y
 CONFIG_FUTEX=y
 CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+CONFIG_GENERIC_CMOS_UPDATE=y
 CONFIG_GENERIC_FIND_NEXT_BIT=y
 CONFIG_GENERIC_HARDIRQS=y
 CONFIG_GENERIC_HWEIGHT=y
 CONFIG_GENERIC_IRQ_PROBE=y
 CONFIG_GENERIC_ISA_DMA=y
 CONFIG_GENERIC_TIME=y
+CONFIG_GROUP_SCHED=y
+CONFIG_HARDWARE_WATCHPOINTS=y
+CONFIG_HAS_DMA=y
 CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT=y
+CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_HAVE_FTRACE=y
+CONFIG_HAVE_GET_CYCLES_32=y
+CONFIG_HAVE_IDE=y
 CONFIG_HAVE_MEMORY_PRESENT=y
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_TRACE_CLOCK=y
+CONFIG_HAVE_TRACE_CLOCK_32_TO_64=y
 CONFIG_HID=y
+CONFIG_HID_SUPPORT=y
 CONFIG_HOTPLUG=y
 CONFIG_HUGETLBFS=y
 CONFIG_HUGETLB_PAGE=y
+CONFIG_HWMON=y
+CONFIG_HWTIMER_HOOKS=y
 CONFIG_HW_CONSOLE=y
 CONFIG_HW_HAS_PCI=y
+CONFIG_HZ_100=y
 CONFIG_HZ_250=y
 CONFIG_I2C=y
 CONFIG_I2C_ALGOBIT=y
+CONFIG_I2C_BOARDINFO=y
 CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_HELPER_AUTO=y
 CONFIG_IDE=y
 CONFIG_IDEDISK_MULTI_MODE=y
 CONFIG_IDEPCI_SHARE_IRQ=y
+CONFIG_IDE_PROC_FS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
 CONFIG_INET=y
 CONFIG_INET_DIAG=y
 CONFIG_INET_TCP_DIAG=y
@@ -120,12 +178,20 @@
 CONFIG_INPUT_MOUSE=y
 CONFIG_INPUT_MOUSEDEV=y
 CONFIG_INPUT_MOUSEDEV_PSAUX=y
+CONFIG_IOSCHED_AS=y
 CONFIG_IOSCHED_CFQ=y
+CONFIG_IOSCHED_DEADLINE=y
 CONFIG_IOSCHED_NOOP=y
 CONFIG_IP_FIB_HASH=y
+CONFIG_IP_MROUTE=y
 CONFIG_IP_MULTICAST=y
+CONFIG_IP_PIMSM_V1=y
+CONFIG_IP_PIMSM_V2=y
 CONFIG_IP_PNP=y
+CONFIG_IP_PNP_BOOTP=y
 CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_RARP=y
+CONFIG_IRQ_CPU=y
 CONFIG_IRQ_PER_CPU=y
 CONFIG_ISA=y
 CONFIG_ISO9660_FS=y
@@ -137,6 +203,7 @@
 CONFIG_JOLIET=y
 CONFIG_KALLSYMS=y
 CONFIG_KEYBOARD_ATKBD=y
+CONFIG_KMOD=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LLC=y
 CONFIG_LOCKD=y
@@ -147,6 +214,9 @@
 CONFIG_LOGO_LINUX_CLUT224=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_MD=y
+CONFIG_MD_FAULTY=y
+CONFIG_MD_LINEAR=y
+CONFIG_MD_MULTIPATH=y
 CONFIG_MD_RAID0=y
 CONFIG_MD_RAID10=y
 CONFIG_MD_RAID1=y
@@ -158,6 +228,7 @@
 CONFIG_MIPS32_O32=y
 CONFIG_MIPS=y
 CONFIG_MIPS_MT_DISABLED=y
+CONFIG_MISC_DEVICES=y
 CONFIG_MMU=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
@@ -171,6 +242,7 @@
 CONFIG_MTD_CFI_AMDSTD=y
 CONFIG_MTD_CFI_GEOMETRY=y
 CONFIG_MTD_CFI_I1=y
+CONFIG_MTD_CFI_I2=y
 CONFIG_MTD_CFI_NOSWAP=y
 CONFIG_MTD_CFI_UTIL=y
 CONFIG_MTD_CHAR=y
@@ -178,16 +250,29 @@
 CONFIG_MTD_GEN_PROBE=y
 CONFIG_MTD_JEDECPROBE=y
 CONFIG_MTD_MAP_BANK_WIDTH_1=y
+CONFIG_MTD_MAP_BANK_WIDTH_2=y
+CONFIG_MTD_MAP_BANK_WIDTH_4=y
+CONFIG_MTD_NAND=y
+CONFIG_MTD_NAND_IDS=y
 CONFIG_MTD_PARTITIONS=y
+CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_SLRAM=y
 CONFIG_NATSEMI=y
 CONFIG_NET=y
+CONFIG_NETCONSOLE=y
 CONFIG_NETDEVICES=y
+CONFIG_NETDEV_10000=y
+CONFIG_NETDEV_1000=y
+CONFIG_NETPOLL=y
+CONFIG_NETPOLL_TRAP=y
+CONFIG_NETWORK_FILESYSTEMS=y
 CONFIG_NET_ETHERNET=y
 CONFIG_NET_PCI=y
+CONFIG_NET_POLL_CONTROLLER=y
 CONFIG_NFS_COMMON=y
 CONFIG_NFS_FS=y
 CONFIG_NFS_V3=y
+CONFIG_NFS_V4=y
 CONFIG_NLS=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_ISO8859_1=y
@@ -195,8 +280,11 @@
 CONFIG_OPROFILE=y
 CONFIG_PACKET=y
 CONFIG_PACKET_MMAP=y
+CONFIG_PAGEFLAGS_EXTENDED=y
 CONFIG_PAGE_SIZE_4KB=y
 CONFIG_PCI=y
+CONFIG_PCI_DOMAINS=y
+CONFIG_PCI_LEGACY=y
 CONFIG_PCI_MSI=y
 CONFIG_PLIST=y
 CONFIG_POSIX_MQUEUE=y
@@ -205,12 +293,15 @@
 CONFIG_PRINTK=y
 CONFIG_PROC_FS=y
 CONFIG_PROC_KCORE=y
+CONFIG_PROC_PAGE_MONITOR=y
 CONFIG_PROC_SYSCTL=y
 CONFIG_PROFILING=y
 CONFIG_RAMFS=y
+CONFIG_RELAY=y
 CONFIG_REPLACE_EMULATED_ACCESS_TO_THREAD_POINTER=y
 CONFIG_RESOURCES_64BIT=y
 CONFIG_ROOT_NFS=y
+CONFIG_RPCSEC_GSS_KRB5=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DEBUG=y
 CONFIG_RTC_DRV_DS1307=y
@@ -222,11 +313,17 @@
 CONFIG_RT_MUTEXES=y
 CONFIG_RWSEM_GENERIC_SPINLOCK=y
 CONFIG_SATA_MV=y
+CONFIG_SATA_PMP=y
 CONFIG_SATA_SIL24=y
+CONFIG_SATA_SIL=y
 CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
 CONFIG_SCSI=y
+CONFIG_SCSI_DMA=y
 CONFIG_SCSI_PROC_FS=y
 CONFIG_SCSI_SAS_ATTRS=y
+CONFIG_SECCOMP=y
+CONFIG_SECURITY=y
+CONFIG_SECURITY_NETWORK=y
 CONFIG_SELECT_MEMORY_MODEL=y
 CONFIG_SERIAL_8250=y
 CONFIG_SERIAL_8250_CONSOLE=y
@@ -239,16 +336,21 @@
 CONFIG_SERIO_LIBPS2=y
 CONFIG_SERIO_SERPORT=y
 CONFIG_SHMEM=y
+CONFIG_SIGNALFD=y
 CONFIG_SKY2=y
 CONFIG_SLAB=y
+CONFIG_SLABINFO=y
 CONFIG_SMP=y
 CONFIG_SPARSEMEM=y
 CONFIG_SPARSEMEM_MANUAL=y
 CONFIG_SPARSEMEM_STATIC=y
+CONFIG_SSB_POSSIBLE=y
 CONFIG_STACKTRACE_SUPPORT=y
 CONFIG_STANDALONE=y
 CONFIG_STOP_MACHINE=y
+CONFIG_STP=y
 CONFIG_SUNRPC=y
+CONFIG_SUNRPC_GSS=y
 CONFIG_SWAP=y
 CONFIG_SWAP_IO_SPACE=y
 CONFIG_SYN_COOKIES=y
@@ -256,18 +358,25 @@
 CONFIG_SYSCTL_SYSCALL=y
 CONFIG_SYSFS=y
 CONFIG_SYSFS_DEPRECATED=y
+CONFIG_SYSFS_DEPRECATED_V2=y
 CONFIG_SYSVIPC=y
 CONFIG_SYSVIPC_COMPAT=y
 CONFIG_SYSVIPC_SYSCTL=y
+CONFIG_SYS_HAS_EARLY_PRINTK=y
+CONFIG_SYS_R4K_CVET_HWTIMER=y
 CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
 CONFIG_SYS_SUPPORTS_64BIT_KERNEL=y
 CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
 CONFIG_SYS_SUPPORTS_BIG_ENDIAN=y
+CONFIG_SYS_SUPPORTS_DYNAMIC_FTRACE=y
 CONFIG_SYS_SUPPORTS_HIGHMEM=y
 CONFIG_SYS_SUPPORTS_KGDB=y
 CONFIG_SYS_SUPPORTS_SMP=y
 CONFIG_TCP_CONG_CUBIC=y
+CONFIG_THERMAL=y
+CONFIG_TIMERFD=y
 CONFIG_TMPFS=y
+CONFIG_TRACEPOINTS=y
 CONFIG_TRACE_IRQFLAGS_SUPPORT=y
 CONFIG_UNIX98_PTYS=y
 CONFIG_UNIX=y
@@ -276,21 +385,29 @@
 CONFIG_USB_ARCH_HAS_HCD=y
 CONFIG_USB_ARCH_HAS_OHCI=y
 CONFIG_USB_DEVICEFS=y
+CONFIG_USB_DEVICE_CLASS=y
 CONFIG_USB_DWC_OTG=y
+CONFIG_USB_DYNAMIC_MINORS=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_HID=y
+CONFIG_USB_LIBUSUAL=y
 CONFIG_USB_MON=y
 CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_LITTLE_ENDIAN=y
 CONFIG_USB_STORAGE=y
+CONFIG_USB_SUPPORT=y
 CONFIG_USB_UHCI_HCD=y
+CONFIG_USER_SCHED=y
+CONFIG_USE_GENERIC_SMP_HELPERS=y
 CONFIG_USE_RI_XI_PAGE_BITS=y
 CONFIG_VFAT_FS=y
 CONFIG_VIA_RHINE=y
 CONFIG_VIA_RHINE_MMIO=y
+CONFIG_VIRT_TO_BUS=y
 CONFIG_VM_EVENT_COUNTERS=y
 CONFIG_VT=y
 CONFIG_VT_CONSOLE=y
+CONFIG_WATCHDOG=y
 CONFIG_WEAK_ORDERING=y
 CONFIG_XFRM=y
 CONFIG_XOR_BLOCKS=y

Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

Hi Majed:

I have compiled by kernel. 2.6.27 config has lot of new stuff - port
multiplier/Sil3124/3132 support etc.

I see following SCHED/DMA related differences:
CONFIG_IOSCHED_AS
CONFIG_IOSCHED_CONFIG
CONFIG_CLASSIS_RCV

CONFIG_SCSI_DMA

Is there anything else that I missed?

Thanks for ur time and help!


On Wed, Sep 16, 2009 at 9:12 PM, Majed B. <majedb@gmail.com> wrote:
> Attached is the diff file between the config files of kernels 21 & 27.
>
> I see a lot of DMA changes and schedulers.
>
> I've asked you before if you compiled your own kernel or do you use
> unmodified distro kernels?
>
> If you compile your own, then you could import the 21 config to the 27
> compile process and then compare the performance of the two kernels.
>
> 2009/9/17 Linux Raid Study <linuxraid.study@gmail.com>:
>> Hi:
>>
>> I tried to change the Raid5 stripe cache size by doing
>> "echo  262144 > /sys/block/md0/md/stripe_cache_size"
>> But if I do "cat /sys/block/md0/md/stripe_cache_size", it still shows 1024!
>>
>> Can someone please suggest how to increase stripe cache size?
>>
>> thanks!
>>
>>
>> 2009/9/10 Keld Jørn Simonsen <keld@dkuug.dk>:
>>> Hi
>>>
>>> There is some data on raid5 performance (and other raid types) at our
>>> wiki at: http://linux-raid.osdl.org/index.php/Performance
>>>
>>> When you have something you want to share with others, then we can add
>>> your info to the data there, either by a URL or by direct inclusion in
>>> the wiki.
>>>
>>> best regards
>>> keld
>>>
>>> On Wed, Sep 09, 2009 at 06:45:31PM -0700, Linux Raid Study wrote:
>>>> I build/compile my own kernel..
>>>>
>>>> Have you done any benchmarks for Read RAID5 perf?
>>>>
>>>> Thanks!
>>>>
>>>> On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>>>> > Well, that's my point. To make sure that your kernels are identical in
>>>> >  options, compare the .config files found in /usr/src/linux-<version>
>>>> >
>>>> >  You may find changes and differences in areas like bluetooth,
>>>> >  wireless, ...etc. These don't matter.
>>>> >
>>>> >  Did you compile your own kernel, or are you using one compiled for a
>>>> >  specific distro?
>>>> >
>>>> >  On Thu, Sep 10, 2009 at 4:17 AM, Linux Raid
>>>> >
>>>> > Study<linuxraid.study@gmail.com> wrote:
>>>> >  > Yes - the setup is the same. The only thing that changes is the kernel.
>>>> >  >
>>>> >  > I have 4 HDDs (2 from WD VelociRaptor 150GB/10k RPM and 2 from Seagate
>>>> >  > 320GB/7.2k RPM).  The HDDs are connected using two Silicon Image SATA
>>>> >  > controllers (Sil3132) connected to my host using PCIe.
>>>> >  >
>>>> >  > I use the default kernel scheduling scheme.
>>>> >  >
>>>> >  > Thanks!
>>>> >  >
>>>> >  > On 9/9/09, Majed B. <majedb@gmail.com> wrote:
>>>> >  >> Are you sure you're using the same Kernel Scheduler on both kernels?
>>>> >  >>
>>>> >  >>  Have you checked and verified that the same drivers are being loaded?
>>>> >  >>  (IDE vs. AHCI -- proprietary drivers vs. open source)
>>>> >  >>
>>>> >  >>  This is interesting!
>>>> >  >>
>>>> >  >>
>>>> >  >>  On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>>>> >  >>  Study<linuxraid.study@gmail.com> wrote:
>>>> >  >>  > Hello:
>>>> >  >>  >
>>>> >  >>  > I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>>>> >  >>  > drop when using kernel 2.6.27.
>>>> >  >>  > The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>>>> >  >>  > setup), the perf is 180MB/s/
>>>> >  >>  >
>>>> >  >>  >
>>>> >  >>  >
>>>> >  >>  > Some of the tests I have done:
>>>> >  >>  > 1. I ran  experiments using iozone also but notice that READ perf with
>>>> >  >>  > RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>>>> >  >>  > Write perf is similar but Read is an issue.
>>>> >  >>  >
>>>> >  >>  > 2. On 2.6.27, I played around with chunk size and blocksize parameters
>>>> >  >>  > and got ~5% improvement but not much. I used following cmds:
>>>> >  >>  >
>>>> >  >>  > #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>>>> >  >>  > /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>>>> >  >>  > #mke2fs -b 4096 -E stride=8 /dev/md0
>>>> >  >>  >
>>>> >  >>  > #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>>> >  >>  >
>>>> >  >>  >
>>>> >  >>  > Is this perf drop a known issue? Can someone please recommend some
>>>> >  >>  > performance tuning tips?
>>>> >  >>  >
>>>> >  >>  > Thanks a lot for your time and help!
>>>> >  >>
>>>> >  >> > --
>>>> >  >>  > To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>> >  >>  > the body of a message to majordomo@vger.kernel.org
>>>> >  >>  > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>> >  >>  >
>>>> >  >>
>>>> >  >>
>>>> >  >>
>>>> >  >>  --
>>>> >  >>
>>>> >  >>        Majed B.
>>>> >  >>
>>>> >  >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > --
>>>> >
>>>> >        Majed B.
>>>> >
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>
>
>
>
> --
>       Majed B.
>
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

Hi Majed, All:

I'm using the default scheduler with 2.6.21 and 2.6.27...do you know
if there is any difference?

I rechecked the perf today - everything (i.e. disks, disk controller
etc) remaining the same, I see around 45MB/s difference in performance
when I change kernel from 2.6.21 to 2.6.27. I issue following cmd to
see performance:
hdparm -t /dev/md0

FYI...I'm using Seagate HDDs (7200 RPM) with RocketRaid 2310 controller.

Any ideas...I have tried blockdev readahead option and it helps but
still not enough...

Thanks a lot!

On Wed, Sep 9, 2009 at 4:52 PM, Majed B. <majedb@gmail.com> wrote:
> Are you sure you're using the same Kernel Scheduler on both kernels?
>
> Have you checked and verified that the same drivers are being loaded?
> (IDE vs. AHCI -- proprietary drivers vs. open source)
>
> This is interesting!
>
> On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
> Study<linuxraid.study@gmail.com> wrote:
>> Hello:
>>
>> I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>> drop when using kernel 2.6.27.
>> The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>> setup), the perf is 180MB/s/
>>
>>
>>
>> Some of the tests I have done:
>> 1. I ran  experiments using iozone also but notice that READ perf with
>> RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>> Write perf is similar but Read is an issue.
>>
>> 2. On 2.6.27, I played around with chunk size and blocksize parameters
>> and got ~5% improvement but not much. I used following cmds:
>>
>> #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>> /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>> #mke2fs -b 4096 -E stride=8 /dev/md0
>>
>> #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>
>>
>> Is this perf drop a known issue? Can someone please recommend some
>> performance tuning tips?
>>
>> Thanks a lot for your time and help!
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>
>
>
> --
>       Majed B.
>

Re: Raid5 Read Perf drop in 2.6.27

[Majed B.]

Did you compare both kernel's config files to see whether these
kernels have been compiled with different options?

On Wed, Sep 16, 2009 at 10:57 AM, Linux Raid Study
<linuxraid.study@gmail.com> wrote:
> Hi Majed, All:
>
> I'm using the default scheduler with 2.6.21 and 2.6.27...do you know
> if there is any difference?
>
> I rechecked the perf today - everything (i.e. disks, disk controller
> etc) remaining the same, I see around 45MB/s difference in performance
> when I change kernel from 2.6.21 to 2.6.27. I issue following cmd to
> see performance:
> hdparm -t /dev/md0
>
> FYI...I'm using Seagate HDDs (7200 RPM) with RocketRaid 2310 controller.
>
> Any ideas...I have tried blockdev readahead option and it helps but
> still not enough...
>
> Thanks a lot!
>
> On Wed, Sep 9, 2009 at 4:52 PM, Majed B. <majedb@gmail.com> wrote:
>> Are you sure you're using the same Kernel Scheduler on both kernels?
>>
>> Have you checked and verified that the same drivers are being loaded?
>> (IDE vs. AHCI -- proprietary drivers vs. open source)
>>
>> This is interesting!
>>
>> On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>> Study<linuxraid.study@gmail.com> wrote:
>>> Hello:
>>>
>>> I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>>> drop when using kernel 2.6.27.
>>> The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>>> setup), the perf is 180MB/s/
>>>
>>>
>>>
>>> Some of the tests I have done:
>>> 1. I ran  experiments using iozone also but notice that READ perf with
>>> RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>>> Write perf is similar but Read is an issue.
>>>
>>> 2. On 2.6.27, I played around with chunk size and blocksize parameters
>>> and got ~5% improvement but not much. I used following cmds:
>>>
>>> #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>>> /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>>> #mke2fs -b 4096 -E stride=8 /dev/md0
>>>
>>> #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>>
>>>
>>> Is this perf drop a known issue? Can someone please recommend some
>>> performance tuning tips?
>>>
>>> Thanks a lot for your time and help!
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>
>>
>>
>> --
>>       Majed B.
>>
>



-- 
       Majed B.
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

Yes - as far as Raid/disk-controller stuff is concerned, they are
same. BTW, is there anything specific you would like me to check.

Have you done similar tests? Do you see any perf drop?

Thanks!

On Wed, Sep 16, 2009 at 1:06 AM, Majed B. <majedb@gmail.com> wrote:
> Did you compare both kernel's config files to see whether these
> kernels have been compiled with different options?
>
> On Wed, Sep 16, 2009 at 10:57 AM, Linux Raid Study
> <linuxraid.study@gmail.com> wrote:
>> Hi Majed, All:
>>
>> I'm using the default scheduler with 2.6.21 and 2.6.27...do you know
>> if there is any difference?
>>
>> I rechecked the perf today - everything (i.e. disks, disk controller
>> etc) remaining the same, I see around 45MB/s difference in performance
>> when I change kernel from 2.6.21 to 2.6.27. I issue following cmd to
>> see performance:
>> hdparm -t /dev/md0
>>
>> FYI...I'm using Seagate HDDs (7200 RPM) with RocketRaid 2310 controller.
>>
>> Any ideas...I have tried blockdev readahead option and it helps but
>> still not enough...
>>
>> Thanks a lot!
>>
>> On Wed, Sep 9, 2009 at 4:52 PM, Majed B. <majedb@gmail.com> wrote:
>>> Are you sure you're using the same Kernel Scheduler on both kernels?
>>>
>>> Have you checked and verified that the same drivers are being loaded?
>>> (IDE vs. AHCI -- proprietary drivers vs. open source)
>>>
>>> This is interesting!
>>>
>>> On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>>> Study<linuxraid.study@gmail.com> wrote:
>>>> Hello:
>>>>
>>>> I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>>>> drop when using kernel 2.6.27.
>>>> The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>>>> setup), the perf is 180MB/s/
>>>>
>>>>
>>>>
>>>> Some of the tests I have done:
>>>> 1. I ran  experiments using iozone also but notice that READ perf with
>>>> RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>>>> Write perf is similar but Read is an issue.
>>>>
>>>> 2. On 2.6.27, I played around with chunk size and blocksize parameters
>>>> and got ~5% improvement but not much. I used following cmds:
>>>>
>>>> #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>>>> /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>>>> #mke2fs -b 4096 -E stride=8 /dev/md0
>>>>
>>>> #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>>>
>>>>
>>>> Is this perf drop a known issue? Can someone please recommend some
>>>> performance tuning tips?
>>>>
>>>> Thanks a lot for your time and help!
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>
>>>
>>>
>>>
>>> --
>>>       Majed B.
>>>
>>
>
>
>
> --
>       Majed B.
>

Re: Raid5 Read Perf drop in 2.6.27

[Majed B.]

Would you mind attaching both kernel config files and emailing them?
Also, did you compile your own kernels or do you run certain images?

On Wed, Sep 16, 2009 at 11:19 AM, Majed B. <majedb@gmail.com> wrote:
> I've run my own tests a few days back on a machine I have, but I
> haven't compared the results to tests on the same machine with older
> kernels.
>
> I have attached my machine's kernel config file.
>
> I run an Ubuntu 9.04 Server - Kernel 2.6.28-15-server.
>
> On Wed, Sep 16, 2009 at 11:10 AM, Linux Raid Study
> <linuxraid.study@gmail.com> wrote:
>> Yes - as far as Raid/disk-controller stuff is concerned, they are
>> same. BTW, is there anything specific you would like me to check.
>>
>> Have you done similar tests? Do you see any perf drop?
>>
>> Thanks!
>>
>> On Wed, Sep 16, 2009 at 1:06 AM, Majed B. <majedb@gmail.com> wrote:
>>> Did you compare both kernel's config files to see whether these
>>> kernels have been compiled with different options?
>>>
>>> On Wed, Sep 16, 2009 at 10:57 AM, Linux Raid Study
>>> <linuxraid.study@gmail.com> wrote:
>>>> Hi Majed, All:
>>>>
>>>> I'm using the default scheduler with 2.6.21 and 2.6.27...do you know
>>>> if there is any difference?
>>>>
>>>> I rechecked the perf today - everything (i.e. disks, disk controller
>>>> etc) remaining the same, I see around 45MB/s difference in performance
>>>> when I change kernel from 2.6.21 to 2.6.27. I issue following cmd to
>>>> see performance:
>>>> hdparm -t /dev/md0
>>>>
>>>> FYI...I'm using Seagate HDDs (7200 RPM) with RocketRaid 2310 controller.
>>>>
>>>> Any ideas...I have tried blockdev readahead option and it helps but
>>>> still not enough...
>>>>
>>>> Thanks a lot!
>>>>
>>>> On Wed, Sep 9, 2009 at 4:52 PM, Majed B. <majedb@gmail.com> wrote:
>>>>> Are you sure you're using the same Kernel Scheduler on both kernels?
>>>>>
>>>>> Have you checked and verified that the same drivers are being loaded?
>>>>> (IDE vs. AHCI -- proprietary drivers vs. open source)
>>>>>
>>>>> This is interesting!
>>>>>
>>>>> On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>>>>> Study<linuxraid.study@gmail.com> wrote:
>>>>>> Hello:
>>>>>>
>>>>>> I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>>>>>> drop when using kernel 2.6.27.
>>>>>> The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>>>>>> setup), the perf is 180MB/s/
>>>>>>
>>>>>>
>>>>>>
>>>>>> Some of the tests I have done:
>>>>>> 1. I ran  experiments using iozone also but notice that READ perf with
>>>>>> RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>>>>>> Write perf is similar but Read is an issue.
>>>>>>
>>>>>> 2. On 2.6.27, I played around with chunk size and blocksize parameters
>>>>>> and got ~5% improvement but not much. I used following cmds:
>>>>>>
>>>>>> #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>>>>>> /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>>>>>> #mke2fs -b 4096 -E stride=8 /dev/md0
>>>>>>
>>>>>> #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>>>>>
>>>>>>
>>>>>> Is this perf drop a known issue? Can someone please recommend some
>>>>>> performance tuning tips?
>>>>>>
>>>>>> Thanks a lot for your time and help!
>>>>>> --
>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>       Majed B.
>>>>>
>>>>
>>>
>>>
>>>
>>> --
>>>       Majed B.
>>>
>>
>
>
>
> --
>       Majed B.
>



-- 
       Majed B.
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

[-- Attachment #1: Type: text/plain, Size: 4072 bytes --]

Attached is .config for 2.6.27 kernel. Its mips64....Do you see
anything wrong with it?

I don't yet access to my m/c for 2.6.21...would email that later.

Any feedback...

Thanks!

On Wed, Sep 16, 2009 at 1:21 AM, Majed B. <majedb@gmail.com> wrote:
> Would you mind attaching both kernel config files and emailing them?
> Also, did you compile your own kernels or do you run certain images?
>
> On Wed, Sep 16, 2009 at 11:19 AM, Majed B. <majedb@gmail.com> wrote:
>> I've run my own tests a few days back on a machine I have, but I
>> haven't compared the results to tests on the same machine with older
>> kernels.
>>
>> I have attached my machine's kernel config file.
>>
>> I run an Ubuntu 9.04 Server - Kernel 2.6.28-15-server.
>>
>> On Wed, Sep 16, 2009 at 11:10 AM, Linux Raid Study
>> <linuxraid.study@gmail.com> wrote:
>>> Yes - as far as Raid/disk-controller stuff is concerned, they are
>>> same. BTW, is there anything specific you would like me to check.
>>>
>>> Have you done similar tests? Do you see any perf drop?
>>>
>>> Thanks!
>>>
>>> On Wed, Sep 16, 2009 at 1:06 AM, Majed B. <majedb@gmail.com> wrote:
>>>> Did you compare both kernel's config files to see whether these
>>>> kernels have been compiled with different options?
>>>>
>>>> On Wed, Sep 16, 2009 at 10:57 AM, Linux Raid Study
>>>> <linuxraid.study@gmail.com> wrote:
>>>>> Hi Majed, All:
>>>>>
>>>>> I'm using the default scheduler with 2.6.21 and 2.6.27...do you know
>>>>> if there is any difference?
>>>>>
>>>>> I rechecked the perf today - everything (i.e. disks, disk controller
>>>>> etc) remaining the same, I see around 45MB/s difference in performance
>>>>> when I change kernel from 2.6.21 to 2.6.27. I issue following cmd to
>>>>> see performance:
>>>>> hdparm -t /dev/md0
>>>>>
>>>>> FYI...I'm using Seagate HDDs (7200 RPM) with RocketRaid 2310 controller.
>>>>>
>>>>> Any ideas...I have tried blockdev readahead option and it helps but
>>>>> still not enough...
>>>>>
>>>>> Thanks a lot!
>>>>>
>>>>> On Wed, Sep 9, 2009 at 4:52 PM, Majed B. <majedb@gmail.com> wrote:
>>>>>> Are you sure you're using the same Kernel Scheduler on both kernels?
>>>>>>
>>>>>> Have you checked and verified that the same drivers are being loaded?
>>>>>> (IDE vs. AHCI -- proprietary drivers vs. open source)
>>>>>>
>>>>>> This is interesting!
>>>>>>
>>>>>> On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>>>>>> Study<linuxraid.study@gmail.com> wrote:
>>>>>>> Hello:
>>>>>>>
>>>>>>> I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>>>>>>> drop when using kernel 2.6.27.
>>>>>>> The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>>>>>>> setup), the perf is 180MB/s/
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Some of the tests I have done:
>>>>>>> 1. I ran  experiments using iozone also but notice that READ perf with
>>>>>>> RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>>>>>>> Write perf is similar but Read is an issue.
>>>>>>>
>>>>>>> 2. On 2.6.27, I played around with chunk size and blocksize parameters
>>>>>>> and got ~5% improvement but not much. I used following cmds:
>>>>>>>
>>>>>>> #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>>>>>>> /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>>>>>>> #mke2fs -b 4096 -E stride=8 /dev/md0
>>>>>>>
>>>>>>> #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>>>>>>
>>>>>>>
>>>>>>> Is this perf drop a known issue? Can someone please recommend some
>>>>>>> performance tuning tips?
>>>>>>>
>>>>>>> Thanks a lot for your time and help!
>>>>>>> --
>>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>>       Majed B.
>>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>       Majed B.
>>>>
>>>
>>
>>
>>
>> --
>>       Majed B.
>>
>
>
>
> --
>       Majed B.
>

[-- Attachment #2: .config --]
[-- Type: application/octet-stream, Size: 41208 bytes --]

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.27.7
# Sat Sep 12 11:56:19 2009
#
CONFIG_MIPS=y

#
# Machine selection
#
CONFIG_ZONE_DMA=y
# CONFIG_MACH_ALCHEMY is not set
# CONFIG_BASLER_EXCITE is not set
# CONFIG_BCM47XX is not set
# CONFIG_MIPS_COBALT is not set
# CONFIG_MACH_DECSTATION is not set
# CONFIG_MACH_JAZZ is not set
# CONFIG_LASAT is not set
# CONFIG_LEMOTE_FULONG is not set
# CONFIG_MIPS_MALTA is not set
# CONFIG_MIPS_SIM is not set
# CONFIG_MARKEINS is not set
# CONFIG_MACH_VR41XX is not set
# CONFIG_PNX8550_JBS is not set
# CONFIG_PNX8550_STB810 is not set
# CONFIG_PMC_MSP is not set
# CONFIG_PMC_YOSEMITE is not set
# CONFIG_SGI_IP22 is not set
# CONFIG_SGI_IP27 is not set
# CONFIG_SGI_IP28 is not set
# CONFIG_SGI_IP32 is not set
# CONFIG_SIBYTE_CRHINE is not set
# CONFIG_SIBYTE_CARMEL is not set
# CONFIG_SIBYTE_CRHONE is not set
# CONFIG_SIBYTE_RHONE is not set
# CONFIG_SIBYTE_SWARM is not set
# CONFIG_SIBYTE_LITTLESUR is not set
# CONFIG_SIBYTE_SENTOSA is not set
# CONFIG_SIBYTE_BIGSUR is not set
# CONFIG_SNI_RM is not set
# CONFIG_MACH_TX39XX is not set
# CONFIG_MACH_TX49XX is not set
# CONFIG_MIKROTIK_RB532 is not set
# CONFIG_WR_PPMC is not set
CONFIG_USE_RI_XI_PAGE_BITS=y
CONFIG_FAST_ACCESS_TO_THREAD_POINTER=y
CONFIG_REPLACE_EMULATED_ACCESS_TO_THREAD_POINTER=y
CONFIG_TEMPORARY_SCRATCHPAD_FOR_KERNEL=1
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_BUILD_ID_DISABLE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_ARCH_SUPPORTS_OPROFILE=y
CONFIG_GENERIC_FIND_NEXT_BIT=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
# CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ is not set
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_CEVT_R4K=y
# CONFIG_EARLY_PRINTK is not set
CONFIG_SYS_HAS_EARLY_PRINTK=y
# CONFIG_HOTPLUG_CPU is not set
# CONFIG_NO_IOPORT is not set
CONFIG_GENERIC_ISA_DMA=y
CONFIG_CPU_BIG_ENDIAN=y
# CONFIG_CPU_LITTLE_ENDIAN is not set
CONFIG_SYS_SUPPORTS_BIG_ENDIAN=y
CONFIG_IRQ_CPU=y
CONFIG_SWAP_IO_SPACE=y
CONFIG_MIPS_L1_CACHE_SHIFT=7

#
# CPU selection
#
# CONFIG_CPU_LOONGSON2 is not set
# CONFIG_CPU_MIPS32_R1 is not set
# CONFIG_CPU_MIPS32_R2 is not set
# CONFIG_CPU_MIPS64_R1 is not set
# CONFIG_CPU_MIPS64_R2 is not set
# CONFIG_CPU_R3000 is not set
# CONFIG_CPU_TX39XX is not set
# CONFIG_CPU_VR41XX is not set
# CONFIG_CPU_R4300 is not set
# CONFIG_CPU_R4X00 is not set
# CONFIG_CPU_TX49XX is not set
# CONFIG_CPU_R5000 is not set
# CONFIG_CPU_R5432 is not set
# CONFIG_CPU_R6000 is not set
# CONFIG_CPU_NEVADA is not set
# CONFIG_CPU_R8000 is not set
# CONFIG_CPU_R10000 is not set
# CONFIG_CPU_RM7000 is not set
# CONFIG_CPU_RM9000 is not set
# CONFIG_CPU_SB1 is not set
CONFIG_SYS_R4K_CVET_HWTIMER=y
CONFIG_WEAK_ORDERING=y
CONFIG_CPU_MIPSR2=y
CONFIG_SYS_SUPPORTS_64BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_64BIT_KERNEL=y
CONFIG_HARDWARE_WATCHPOINTS=y

#
# Kernel type
#
# CONFIG_32BIT is not set
CONFIG_64BIT=y
CONFIG_PAGE_SIZE_4KB=y
# CONFIG_PAGE_SIZE_8KB is not set
# CONFIG_PAGE_SIZE_16KB is not set
# CONFIG_PAGE_SIZE_32KB is not set
# CONFIG_PAGE_SIZE_64KB is not set
CONFIG_CPU_HAS_PREFETCH=y
CONFIG_MIPS_MT_DISABLED=y
# CONFIG_MIPS_MT_SMP is not set
# CONFIG_MIPS_MT_SMTC is not set
CONFIG_SYS_SUPPORTS_DYNAMIC_FTRACE=y
CONFIG_64BIT_PHYS_ADDR=y
CONFIG_CPU_HAS_SYNC=y
CONFIG_HAVE_GET_CYCLES_32=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_IRQ_PER_CPU=y
CONFIG_CPU_SUPPORTS_HIGHMEM=y
CONFIG_SYS_SUPPORTS_HIGHMEM=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_SELECT_MEMORY_MODEL=y
# CONFIG_FLATMEM_MANUAL is not set
# CONFIG_DISCONTIGMEM_MANUAL is not set
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_HAVE_MEMORY_PRESENT=y
CONFIG_SPARSEMEM_STATIC=y
# CONFIG_SPARSEMEM_VMEMMAP_ENABLE is not set
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_RESOURCES_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_SMP=y
CONFIG_SYS_SUPPORTS_SMP=y
CONFIG_NR_CPUS_DEFAULT_16=y
CONFIG_NR_CPUS=16
# CONFIG_TICK_ONESHOT is not set
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
# CONFIG_HZ_48 is not set
CONFIG_HZ_100=y
# CONFIG_HZ_128 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_256 is not set
# CONFIG_HZ_1000 is not set
# CONFIG_HZ_1024 is not set
CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
CONFIG_HZ=100
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
# CONFIG_CPUISOL is not set
# CONFIG_KEXEC is not set
CONFIG_SECCOMP=y
# CONFIG_MIPS_FPU_EMULATOR_STATS_ENABLED is not set
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_CGROUPS is not set
# CONFIG_HAVE_GET_CYCLES is not set
CONFIG_HAVE_TRACE_CLOCK=y
CONFIG_HAVE_TRACE_CLOCK_32_TO_64=y
# CONFIG_HAVE_UNSTABLE_TSC is not set
CONFIG_GROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
# CONFIG_RT_GROUP_SCHED is not set
CONFIG_USER_SCHED=y
# CONFIG_CGROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_RELAY=y
# CONFIG_NAMESPACES is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_HWTIMER_HOOKS=y
# CONFIG_HWTIMER_TEST is not set
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_EMBEDDED=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
# CONFIG_PCSPKR_PLATFORM is not set
CONFIG_COMPAT_BRK=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
CONFIG_PROFILING=y
CONFIG_TRACEPOINTS=y
# CONFIG_MARKERS is not set
CONFIG_OPROFILE=y
CONFIG_HAVE_OPROFILE=y
# CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is not set
# CONFIG_HAVE_IOREMAP_PROT is not set
# CONFIG_HAVE_KPROBES is not set
# CONFIG_HAVE_KRETPROBES is not set
# CONFIG_HAVE_ARCH_TRACEHOOK is not set
# CONFIG_HAVE_DMA_ATTRS is not set
CONFIG_USE_GENERIC_SMP_HELPERS=y
# CONFIG_HAVE_CLK is not set
# CONFIG_HAVE_MARKERS_ABI is not set

#
# Linux Trace Toolkit
#
# CONFIG_HAVE_LTT_DUMP_TABLES is not set
# CONFIG_LTT_RELAY_ALLOC is not set
CONFIG_PROC_PAGE_MONITOR=y
# CONFIG_HAVE_IMMEDIATE is not set
# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
CONFIG_BLOCK_COMPAT=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
CONFIG_CLASSIC_RCU=y
# CONFIG_PROBE_INITRD_HEADER is not set

#
# Bus options (PCI, PCMCIA, EISA, ISA, TC)
#
CONFIG_HW_HAS_PCI=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
# CONFIG_ARCH_SUPPORTS_MSI is not set
CONFIG_PCI_LEGACY=y
# CONFIG_PCI_DEBUG is not set
CONFIG_ISA=y
CONFIG_MMU=y
# CONFIG_PCCARD is not set
# CONFIG_HOTPLUG_PCI is not set

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
# CONFIG_BINFMT_MISC is not set
CONFIG_MIPS32_COMPAT=y
CONFIG_COMPAT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_MIPS32_O32=y
CONFIG_MIPS32_N32=y
CONFIG_BINFMT_ELF32=y

#
# Power management options
#
# CONFIG_PM is not set
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
CONFIG_XFRM=y
CONFIG_XFRM_USER=m
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
CONFIG_NET_KEY=m
# CONFIG_NET_KEY_MIGRATE is not set
# CONFIG_INTERPEAK is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
CONFIG_IP_MROUTE=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
# CONFIG_IPSEC_NAT_TRAVERSAL is not set
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
# CONFIG_INET_LRO is not set
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=m
# CONFIG_IPV6_PRIVACY is not set
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
CONFIG_INET6_XFRM_MODE_TUNNEL=m
CONFIG_INET6_XFRM_MODE_BEET=m
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
# CONFIG_IPV6_SIT is not set
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_IPV6_MROUTE is not set
# CONFIG_NETLABEL is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
CONFIG_STP=y
CONFIG_BRIDGE=y
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
CONFIG_LLC=y
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_SCHED is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set

#
# Wireless
#
# CONFIG_CFG80211 is not set
# CONFIG_WIRELESS_EXT is not set
# CONFIG_MAC80211 is not set
# CONFIG_IEEE80211 is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
# CONFIG_FW_LOADER is not set
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_CONNECTOR is not set
CONFIG_MTD=y
# CONFIG_MTD_DEBUG is not set
# CONFIG_MTD_CONCAT is not set
CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_REDBOOT_PARTS is not set
CONFIG_MTD_CMDLINE_PARTS=y
# CONFIG_MTD_AR7_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set
# CONFIG_MTD_OOPS is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_GEN_PROBE=y
# CONFIG_MTD_CFI_ADV_OPTIONS is not set
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_I8 is not set
# CONFIG_MTD_CFI_INTELEXT is not set
CONFIG_MTD_CFI_AMDSTD=y
# CONFIG_MTD_CFI_STAA is not set
CONFIG_MTD_CFI_UTIL=y
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
CONFIG_MTD_PHYSMAP=y
CONFIG_MTD_PHYSMAP_START=0x8000000
CONFIG_MTD_PHYSMAP_LEN=0x0
CONFIG_MTD_PHYSMAP_BANKWIDTH=2
# CONFIG_MTD_INTEL_VR_NOR is not set
# CONFIG_MTD_PLATRAM is not set

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_PMC551 is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOC2000 is not set
# CONFIG_MTD_DOC2001 is not set
# CONFIG_MTD_DOC2001PLUS is not set
CONFIG_MTD_NAND=y
# CONFIG_MTD_NAND_VERIFY_WRITE is not set
# CONFIG_MTD_NAND_ECC_SMC is not set
# CONFIG_MTD_NAND_MUSEUM_IDS is not set
CONFIG_MTD_NAND_IDS=y
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_CAFE is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_PLATFORM is not set
# CONFIG_MTD_ALAUDA is not set
# CONFIG_MTD_ONENAND is not set

#
# UBI - Unsorted block images
#
# CONFIG_MTD_UBI is not set
# CONFIG_PARPORT is not set
# CONFIG_PNP is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=1
CONFIG_BLK_DEV_RAM_SIZE=500000
# CONFIG_BLK_DEV_XIP is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_HD is not set
CONFIG_MISC_DEVICES=y
# CONFIG_PHANTOM is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_SGI_IOC4 is not set
# CONFIG_TIFM_CORE is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_HP_ILO is not set
CONFIG_HAVE_IDE=y
CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y

#
# Please see Documentation/ide/ide.txt for help/info on IDE drives
#
# CONFIG_BLK_DEV_IDE_SATA is not set
CONFIG_BLK_DEV_IDEDISK=y
# CONFIG_IDEDISK_MULTI_MODE is not set
# CONFIG_BLK_DEV_IDECD is not set
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI is not set
# CONFIG_IDE_TASK_IOCTL is not set
CONFIG_IDE_PROC_FS=y

#
# IDE chipset support/bugfixes
#
# CONFIG_IDE_GENERIC is not set
# CONFIG_BLK_DEV_PLATFORM is not set

#
# PCI IDE chipsets support
#
# CONFIG_BLK_DEV_GENERIC is not set
# CONFIG_BLK_DEV_OPTI621 is not set
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD74XX is not set
# CONFIG_BLK_DEV_CMD64X is not set
# CONFIG_BLK_DEV_TRIFLEX is not set
# CONFIG_BLK_DEV_CS5520 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_HPT366 is not set
# CONFIG_BLK_DEV_JMICRON is not set
# CONFIG_BLK_DEV_SC1200 is not set
# CONFIG_BLK_DEV_PIIX is not set
# CONFIG_BLK_DEV_IT8213 is not set
# CONFIG_BLK_DEV_IT821X is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_PDC202XX_OLD is not set
# CONFIG_BLK_DEV_PDC202XX_NEW is not set
# CONFIG_BLK_DEV_SVWKS is not set
# CONFIG_BLK_DEV_SIIMAGE is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_VIA82CXXX is not set
# CONFIG_BLK_DEV_TC86C001 is not set

#
# Other IDE chipsets support
#

#
# Note: most of these also require special kernel boot parameters
#
# CONFIG_BLK_DEV_4DRIVES is not set
# CONFIG_BLK_DEV_ALI14XX is not set
# CONFIG_BLK_DEV_DTC2278 is not set
# CONFIG_BLK_DEV_HT6560B is not set
# CONFIG_BLK_DEV_QD65XX is not set
# CONFIG_BLK_DEV_UMC8672 is not set
# CONFIG_BLK_DEV_IDEDMA is not set

#
# SCSI device support
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
# CONFIG_CHR_DEV_SG is not set
# CONFIG_CHR_DEV_SCH is not set

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
# CONFIG_SCSI_MULTI_LUN is not set
# CONFIG_SCSI_CONSTANTS is not set
# CONFIG_SCSI_LOGGING is not set
# CONFIG_SCSI_SCAN_ASYNC is not set
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_DH is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_SATA_PMP=y
# CONFIG_SATA_AHCI is not set
CONFIG_SATA_SIL24=y
CONFIG_ATA_SFF=y
# CONFIG_SATA_SVW is not set
# CONFIG_ATA_PIIX is not set
CONFIG_SATA_MV=y
# CONFIG_SATA_NV is not set
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SX4 is not set
CONFIG_SATA_SIL=y
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set
# CONFIG_SATA_INIC162X is not set
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CS5520 is not set
# CONFIG_PATA_CS5530 is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_LEGACY is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_QDI is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RZ1000 is not set
# CONFIG_PATA_SC1200 is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set
# CONFIG_PATA_WINBOND_VLB is not set
# CONFIG_PATA_PLATFORM is not set
# CONFIG_PATA_SCH is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=y
CONFIG_MD_RAID0=y
CONFIG_MD_RAID1=y
CONFIG_MD_RAID10=y
CONFIG_MD_RAID456=y
CONFIG_MD_RAID5_RESHAPE=y
CONFIG_MD_MULTIPATH=y
CONFIG_MD_FAULTY=y
CONFIG_BLK_DEV_DM=y
# CONFIG_DM_DEBUG is not set
CONFIG_DM_CRYPT=y
CONFIG_DM_SNAPSHOT=y
CONFIG_DM_MIRROR=y
CONFIG_DM_ZERO=y
# CONFIG_DM_MULTIPATH is not set
# CONFIG_DM_DELAY is not set
# CONFIG_DM_UEVENT is not set
# CONFIG_DM_IOBAND is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#

#
# Enable only one of the two stacks, unless you know what you are doing
#
# CONFIG_FIREWIRE is not set
# CONFIG_IEEE1394 is not set
# CONFIG_I2O is not set
CONFIG_NETDEVICES=y
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
# CONFIG_VETH is not set
# CONFIG_ARCNET is not set
# CONFIG_PHYLIB is not set
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
# CONFIG_AX88796 is not set
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_NET_VENDOR_SMC is not set
# CONFIG_DM9000 is not set
# CONFIG_NET_VENDOR_RACAL is not set
# CONFIG_NET_TULIP is not set
# CONFIG_AT1700 is not set
# CONFIG_DEPCA is not set
# CONFIG_HP100 is not set
# CONFIG_NET_ISA is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_AMD8111_ETH is not set
# CONFIG_ADAPTEC_STARFIRE is not set
# CONFIG_AC3200 is not set
# CONFIG_APRICOT is not set
# CONFIG_B44 is not set
# CONFIG_FORCEDETH is not set
# CONFIG_CS89x0 is not set
# CONFIG_TC35815 is not set
# CONFIG_EEPRO100 is not set
# CONFIG_E100 is not set
# CONFIG_FEALNX is not set
# CONFIG_NATSEMI is not set
# CONFIG_NE2K_PCI is not set
# CONFIG_8139CP is not set
CONFIG_8139TOO=y
CONFIG_8139TOO_PIO=y
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_R6040 is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SUNDANCE is not set
# CONFIG_TLAN is not set
# CONFIG_VIA_RHINE is not set
# CONFIG_SC92031 is not set
CONFIG_NETDEV_1000=y
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
CONFIG_E1000=y
# CONFIG_E1000_DISABLE_PACKET_SPLIT is not set
CONFIG_E1000E=y
# CONFIG_IP1000 is not set
# CONFIG_IGB is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_R8169 is not set
# CONFIG_SIS190 is not set
# CONFIG_SKGE is not set
CONFIG_SKY2=y
# CONFIG_VIA_VELOCITY is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
CONFIG_NETDEV_10000=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_IXGBE is not set
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set
# CONFIG_MYRI10GE is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_NIU is not set
# CONFIG_MLX4_CORE is not set
# CONFIG_TEHUTI is not set
# CONFIG_BNX2X is not set
# CONFIG_SFC is not set
# CONFIG_TR is not set

#
# Wireless LAN
#
# CONFIG_WLAN_PRE80211 is not set
# CONFIG_WLAN_80211 is not set
# CONFIG_IWLWIFI_LEDS is not set

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_WAN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NET_FC is not set
CONFIG_NETCONSOLE=y
# CONFIG_NETCONSOLE_DYNAMIC is not set
CONFIG_NETPOLL=y
CONFIG_NETPOLL_TRAP=y
CONFIG_NET_POLL_CONTROLLER=y
# CONFIG_ISDN is not set
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set

#
# Userland interfaces
#
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
# CONFIG_SERIO is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
# CONFIG_VT is not set
CONFIG_DEVKMEM=y
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_NR_UARTS=2
CONFIG_SERIAL_8250_RUNTIME_UARTS=2
# CONFIG_SERIAL_8250_EXTENDED is not set

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
CONFIG_DEVPORT=y
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
# CONFIG_I2C_I801 is not set
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_SIMTEC is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Graphics adapter I2C/DDC channel drivers
#
# CONFIG_I2C_VOODOO3 is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_PCA_ISA is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_STUB is not set

#
# Miscellaneous I2C Chip support
#
# CONFIG_DS1682 is not set
# CONFIG_AT24 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCA9539 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_TSL2563 is not set
# CONFIG_LP5521 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set
# CONFIG_SPI is not set
# CONFIG_W1 is not set
# CONFIG_POWER_SUPPLY is not set
CONFIG_HWMON=y
# CONFIG_HWMON_VID is not set
# CONFIG_SENSORS_AD7414 is not set
# CONFIG_SENSORS_AD7418 is not set
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1029 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7470 is not set
# CONFIG_SENSORS_ADT7473 is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_F71805F is not set
# CONFIG_SENSORS_F71882FG is not set
# CONFIG_SENSORS_F75375S is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_IT87 is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_DME1737 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_ADS7828 is not set
# CONFIG_SENSORS_THMC50 is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT1211 is not set
# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
# CONFIG_SENSORS_W83793 is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83L786NG is not set
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set
# CONFIG_HWMON_DEBUG_CHIP is not set
CONFIG_THERMAL=y
# CONFIG_THERMAL_HWMON is not set
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set

#
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
# CONFIG_ALIM7101_WDT is not set

#
# ISA-based Watchdog Cards
#
# CONFIG_PCWATCHDOG is not set
# CONFIG_MIXCOMWD is not set
# CONFIG_WDT is not set

#
# PCI-based Watchdog Cards
#
# CONFIG_PCIPCWATCHDOG is not set
# CONFIG_WDTPCI is not set

#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set

#
# Sonics Silicon Backplane
#
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_MFD_TMIO is not set

#
# Multimedia devices
#

#
# Multimedia core support
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
# CONFIG_VIDEO_MEDIA is not set

#
# Multimedia drivers
#
# CONFIG_DAB is not set

#
# Graphics support
#
# CONFIG_DRM is not set
# CONFIG_VGASTATE is not set
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
# CONFIG_FB is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set
# CONFIG_SOUND is not set
CONFIG_HID_SUPPORT=y
CONFIG_HID=y
# CONFIG_HID_DEBUG is not set
# CONFIG_HIDRAW is not set

#
# USB Input Devices
#
CONFIG_USB_HID=y
# CONFIG_USB_HIDINPUT_POWERBOOK is not set
# CONFIG_HID_FF is not set
# CONFIG_USB_HIDDEV is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
CONFIG_USB_DEVICE_CLASS=y
CONFIG_USB_DYNAMIC_MINORS=y
# CONFIG_USB_OTG is not set
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
CONFIG_USB_MON=y

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_EHCI_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
# CONFIG_USB_UHCI_HCD is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
CONFIG_USB_DWC_OTG=y

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set

#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#

#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
CONFIG_USB_LIBUSUAL=y

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_BERRY_CHARGE is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_PHIDGET is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_GADGET is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
# CONFIG_RTC_HCTOSYS is not set
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
CONFIG_RTC_DRV_DS1307=y
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set

#
# SPI RTC drivers
#

#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
CONFIG_DMADEVICES=y

#
# DMA Devices
#
CONFIG_DMA_ENGINE=y

#
# DMA Clients
#
# CONFIG_NET_DMA is not set
# CONFIG_DMATEST is not set
# CONFIG_UIO is not set

#
# File systems
#
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
# CONFIG_EXT2_FS_SECURITY is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
# CONFIG_EXT3_FS_SECURITY is not set
# CONFIG_EXT4DEV_FS is not set
CONFIG_JBD=y
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
CONFIG_FS_POSIX_ACL=y
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
CONFIG_DNOTIFY=y
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
# CONFIG_MSDOS_FS is not set
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
# CONFIG_CONFIGFS_FS is not set

#
# Layered filesystems
#
# CONFIG_UNION_FS is not set

#
# Miscellaneous filesystems
#
# CONFIG_AXFS is not set
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_YAFFS_FS is not set
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_FS_DEBUG=0
CONFIG_JFFS2_FS_WRITEBUFFER=y
# CONFIG_JFFS2_FS_WBUF_VERIFY is not set
# CONFIG_JFFS2_SUMMARY is not set
# CONFIG_JFFS2_FS_XATTR is not set
# CONFIG_JFFS2_COMPRESSION_OPTIONS is not set
CONFIG_JFFS2_ZLIB=y
# CONFIG_JFFS2_LZO is not set
CONFIG_JFFS2_RTIME=y
# CONFIG_JFFS2_RUBIN is not set
# CONFIG_LOGFS is not set
CONFIG_CRAMFS=y
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
# CONFIG_NFS_V3_ACL is not set
CONFIG_NFS_V4=y
CONFIG_ROOT_NFS=y
# CONFIG_NFSD is not set
CONFIG_ROOT_NFS_PATH="/tftpboot/%s"
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
CONFIG_RPCSEC_GSS_KRB5=y
# CONFIG_RPCSEC_GSS_SPKM3 is not set
# CONFIG_SMB_FS is not set
# CONFIG_CIFS is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_UTF8 is not set
# CONFIG_DLM is not set

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_PRINTK_TIME is not set
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=2048
CONFIG_MAGIC_SYSRQ=y
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_HEADERS_CHECK is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
# CONFIG_DETECT_SOFTLOCKUP is not set
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_DEBUG_SLAB is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_INFO=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_WRITECOUNT is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_HAVE_PSRWLOCK_ASM_CALL is not set
# CONFIG_SYSCTL_SYSCALL_CHECK is not set
CONFIG_HAVE_FTRACE=y
# CONFIG_FTRACE is not set
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_CONTEXT_SWITCH_TRACER is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_FTRACE_EARLY is not set
# CONFIG_DYNAMIC_PRINTK_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_CMDLINE=""
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_RUNTIME_DEBUG is not set

#
# Security options
#
# CONFIG_KEYS is not set
CONFIG_SECURITY=y
CONFIG_SECURITY_NETWORK=y
# CONFIG_SECURITY_NETWORK_XFRM is not set
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
# CONFIG_SECURITY_ROOTPLUG is not set
# CONFIG_SECURITY_LOWMEM is not set
CONFIG_SECURITY_DEFAULT_MMAP_MIN_ADDR=0
# CONFIG_SECURITY_BSDJAIL is not set
CONFIG_XOR_BLOCKS=y
CONFIG_ASYNC_CORE=y
CONFIG_ASYNC_MEMCPY=y
CONFIG_ASYNC_XOR=y
CONFIG_ASYNC_PQ=y
CONFIG_ASYNC_RAID6_RECOV=y
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_MANAGER=y
# CONFIG_CRYPTO_GF128MUL is not set
CONFIG_CRYPTO_NULL=m
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_AUTHENC=m
# CONFIG_CRYPTO_TEST is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_ECB is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_XCBC is not set

#
# Digest
#
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_MD4 is not set
CONFIG_CRYPTO_MD5=y
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
CONFIG_CRYPTO_SHA1=m
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
CONFIG_CRYPTO_AES=m
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_ARC4 is not set
CONFIG_CRYPTO_BLOWFISH=m
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
CONFIG_CRYPTO_DES=y
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set

#
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
# CONFIG_CRYPTO_LZO is not set
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_HIFN_795X is not set

#
# OCF Configuration
#
# CONFIG_OCF_OCF is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
# CONFIG_GENERIC_FIND_FIRST_BIT is not set
# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y

Re: Raid5 Read Perf drop in 2.6.27

[Linux Raid Study]

[-- Attachment #1: Type: text/plain, Size: 4392 bytes --]

Attached is .config for 2.6.21...pls let me know if you see any issues with it.

Thanks a lot!

On Wed, Sep 16, 2009 at 1:46 AM, Linux Raid Study
<linuxraid.study@gmail.com> wrote:
> Attached is .config for 2.6.27 kernel. Its mips64....Do you see
> anything wrong with it?
>
> I don't yet access to my m/c for 2.6.21...would email that later.
>
> Any feedback...
>
> Thanks!
>
> On Wed, Sep 16, 2009 at 1:21 AM, Majed B. <majedb@gmail.com> wrote:
>> Would you mind attaching both kernel config files and emailing them?
>> Also, did you compile your own kernels or do you run certain images?
>>
>> On Wed, Sep 16, 2009 at 11:19 AM, Majed B. <majedb@gmail.com> wrote:
>>> I've run my own tests a few days back on a machine I have, but I
>>> haven't compared the results to tests on the same machine with older
>>> kernels.
>>>
>>> I have attached my machine's kernel config file.
>>>
>>> I run an Ubuntu 9.04 Server - Kernel 2.6.28-15-server.
>>>
>>> On Wed, Sep 16, 2009 at 11:10 AM, Linux Raid Study
>>> <linuxraid.study@gmail.com> wrote:
>>>> Yes - as far as Raid/disk-controller stuff is concerned, they are
>>>> same. BTW, is there anything specific you would like me to check.
>>>>
>>>> Have you done similar tests? Do you see any perf drop?
>>>>
>>>> Thanks!
>>>>
>>>> On Wed, Sep 16, 2009 at 1:06 AM, Majed B. <majedb@gmail.com> wrote:
>>>>> Did you compare both kernel's config files to see whether these
>>>>> kernels have been compiled with different options?
>>>>>
>>>>> On Wed, Sep 16, 2009 at 10:57 AM, Linux Raid Study
>>>>> <linuxraid.study@gmail.com> wrote:
>>>>>> Hi Majed, All:
>>>>>>
>>>>>> I'm using the default scheduler with 2.6.21 and 2.6.27...do you know
>>>>>> if there is any difference?
>>>>>>
>>>>>> I rechecked the perf today - everything (i.e. disks, disk controller
>>>>>> etc) remaining the same, I see around 45MB/s difference in performance
>>>>>> when I change kernel from 2.6.21 to 2.6.27. I issue following cmd to
>>>>>> see performance:
>>>>>> hdparm -t /dev/md0
>>>>>>
>>>>>> FYI...I'm using Seagate HDDs (7200 RPM) with RocketRaid 2310 controller.
>>>>>>
>>>>>> Any ideas...I have tried blockdev readahead option and it helps but
>>>>>> still not enough...
>>>>>>
>>>>>> Thanks a lot!
>>>>>>
>>>>>> On Wed, Sep 9, 2009 at 4:52 PM, Majed B. <majedb@gmail.com> wrote:
>>>>>>> Are you sure you're using the same Kernel Scheduler on both kernels?
>>>>>>>
>>>>>>> Have you checked and verified that the same drivers are being loaded?
>>>>>>> (IDE vs. AHCI -- proprietary drivers vs. open source)
>>>>>>>
>>>>>>> This is interesting!
>>>>>>>
>>>>>>> On Thu, Sep 10, 2009 at 1:54 AM, Linux Raid
>>>>>>> Study<linuxraid.study@gmail.com> wrote:
>>>>>>>> Hello:
>>>>>>>>
>>>>>>>> I'm benchmarking RAID5 Read performance with 4 disks and notice perf
>>>>>>>> drop when using kernel 2.6.27.
>>>>>>>> The perf with 2.6.27 is 150MB/s whereas with kernel 2.6.21 (and same
>>>>>>>> setup), the perf is 180MB/s/
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Some of the tests I have done:
>>>>>>>> 1. I ran  experiments using iozone also but notice that READ perf with
>>>>>>>> RAID5 in 2.6.27 is ~30% less as compared to 2.6.21.
>>>>>>>> Write perf is similar but Read is an issue.
>>>>>>>>
>>>>>>>> 2. On 2.6.27, I played around with chunk size and blocksize parameters
>>>>>>>> and got ~5% improvement but not much. I used following cmds:
>>>>>>>>
>>>>>>>> #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4
>>>>>>>> /dev/sda /dev/sdb /dev/sdc /dev/sdd --chunk=32
>>>>>>>> #mke2fs -b 4096 -E stride=8 /dev/md0
>>>>>>>>
>>>>>>>> #time dd if=/dev/md0 of=/dev/null bs=94208 count=1024
>>>>>>>>
>>>>>>>>
>>>>>>>> Is this perf drop a known issue? Can someone please recommend some
>>>>>>>> performance tuning tips?
>>>>>>>>
>>>>>>>> Thanks a lot for your time and help!
>>>>>>>> --
>>>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>>       Majed B.
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>       Majed B.
>>>>>
>>>>
>>>
>>>
>>>
>>> --
>>>       Majed B.
>>>
>>
>>
>>
>> --
>>       Majed B.
>>
>

[-- Attachment #2: .config.2.6.21 --]
[-- Type: application/octet-stream, Size: 38135 bytes --]

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.21.7
# Mon Mar 30 19:40:20 2009
#
CONFIG_MIPS=y

#
# Machine selection
#
CONFIG_ZONE_DMA=y
# CONFIG_MIPS_MTX1 is not set
# CONFIG_MIPS_BOSPORUS is not set
# CONFIG_MIPS_PB1000 is not set
# CONFIG_MIPS_PB1100 is not set
# CONFIG_MIPS_PB1500 is not set
# CONFIG_MIPS_PB1550 is not set
# CONFIG_MIPS_PB1200 is not set
# CONFIG_MIPS_DB1000 is not set
# CONFIG_MIPS_DB1100 is not set
# CONFIG_MIPS_DB1500 is not set
# CONFIG_MIPS_DB1550 is not set
# CONFIG_MIPS_DB1200 is not set
# CONFIG_MIPS_MIRAGE is not set
# CONFIG_BASLER_EXCITE is not set
# CONFIG_MIPS_COBALT is not set
# CONFIG_MACH_DECSTATION is not set
# CONFIG_MIPS_EV64120 is not set
# CONFIG_MACH_JAZZ is not set
# CONFIG_LASAT is not set
# CONFIG_MIPS_ATLAS is not set
# CONFIG_MIPS_MALTA is not set
# CONFIG_MIPS_SEAD is not set
# CONFIG_WR_PPMC is not set
# CONFIG_MIPS_SIM is not set
# CONFIG_MOMENCO_JAGUAR_ATX is not set
# CONFIG_MOMENCO_OCELOT is not set
# CONFIG_MOMENCO_OCELOT_3 is not set
# CONFIG_MOMENCO_OCELOT_C is not set
# CONFIG_MOMENCO_OCELOT_G is not set
# CONFIG_MIPS_XXS1500 is not set
# CONFIG_PNX8550_JBS is not set
# CONFIG_PNX8550_STB810 is not set
# CONFIG_DDB5477 is not set
# CONFIG_MACH_VR41XX is not set
# CONFIG_PMC_YOSEMITE is not set
# CONFIG_QEMU is not set
# CONFIG_MARKEINS is not set
# CONFIG_SGI_IP22 is not set
# CONFIG_SGI_IP27 is not set
# CONFIG_SGI_IP32 is not set
# CONFIG_SIBYTE_BIGSUR is not set
# CONFIG_SIBYTE_SWARM is not set
# CONFIG_SIBYTE_SENTOSA is not set
# CONFIG_SIBYTE_RHONE is not set
# CONFIG_SIBYTE_CARMEL is not set
# CONFIG_SIBYTE_PTSWARM is not set
# CONFIG_SIBYTE_LITTLESUR is not set
# CONFIG_SIBYTE_CRHINE is not set
# CONFIG_SIBYTE_CRHONE is not set
# CONFIG_SNI_RM is not set
# CONFIG_TOSHIBA_JMR3927 is not set
# CONFIG_TOSHIBA_RBTX4927 is not set
# CONFIG_TOSHIBA_RBTX4938 is not set
CONFIG_USE_RI_XI_PAGE_BITS=y
CONFIG_FAST_ACCESS_TO_THREAD_POINTER=y
CONFIG_REPLACE_EMULATED_ACCESS_TO_THREAD_POINTER=y
CONFIG_TEMPORARY_SCRATCHPAD_FOR_KERNEL=1
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_GENERIC_FIND_NEXT_BIT=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_TIME=y
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
# CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ is not set
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_CPU_BIG_ENDIAN=y
# CONFIG_CPU_LITTLE_ENDIAN is not set
CONFIG_SYS_SUPPORTS_BIG_ENDIAN=y
CONFIG_SWAP_IO_SPACE=y
CONFIG_MIPS_L1_CACHE_SHIFT=7

#
# CPU selection
#
# CONFIG_CPU_MIPS32_R1 is not set
# CONFIG_CPU_MIPS32_R2 is not set
# CONFIG_CPU_MIPS64_R1 is not set
# CONFIG_CPU_MIPS64_R2 is not set
# CONFIG_CPU_R3000 is not set
# CONFIG_CPU_TX39XX is not set
# CONFIG_CPU_VR41XX is not set
# CONFIG_CPU_R4300 is not set
# CONFIG_CPU_R4X00 is not set
# CONFIG_CPU_TX49XX is not set
# CONFIG_CPU_R5000 is not set
# CONFIG_CPU_R5432 is not set
# CONFIG_CPU_R6000 is not set
# CONFIG_CPU_NEVADA is not set
# CONFIG_CPU_R8000 is not set
# CONFIG_CPU_R10000 is not set
# CONFIG_CPU_RM7000 is not set
# CONFIG_CPU_RM9000 is not set
# CONFIG_CPU_SB1 is not set
CONFIG_WEAK_ORDERING=y
CONFIG_CPU_MIPSR2=y
CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
CONFIG_SYS_SUPPORTS_64BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_64BIT_KERNEL=y

#
# Kernel type
#
# CONFIG_32BIT is not set
CONFIG_64BIT=y
CONFIG_PAGE_SIZE_4KB=y
# CONFIG_PAGE_SIZE_8KB is not set
# CONFIG_PAGE_SIZE_16KB is not set
# CONFIG_PAGE_SIZE_32KB is not set
# CONFIG_PAGE_SIZE_64KB is not set
CONFIG_CPU_HAS_PREFETCH=y
CONFIG_MIPS_MT_DISABLED=y
# CONFIG_MIPS_MT_SMP is not set
# CONFIG_MIPS_MT_SMTC is not set
# CONFIG_MIPS_VPE_LOADER is not set
CONFIG_CPU_HAS_SYNC=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_IRQ_PER_CPU=y
CONFIG_CPU_SUPPORTS_HIGHMEM=y
CONFIG_SYS_SUPPORTS_HIGHMEM=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_SELECT_MEMORY_MODEL=y
# CONFIG_FLATMEM_MANUAL is not set
# CONFIG_DISCONTIGMEM_MANUAL is not set
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_HAVE_MEMORY_PRESENT=y
CONFIG_SPARSEMEM_STATIC=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_RESOURCES_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_SMP=y
CONFIG_SYS_SUPPORTS_SMP=y
CONFIG_NR_CPUS_DEFAULT_16=y
CONFIG_NR_CPUS=16
# CONFIG_HZ_48 is not set
# CONFIG_HZ_100 is not set
# CONFIG_HZ_128 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_256 is not set
# CONFIG_HZ_1000 is not set
# CONFIG_HZ_1024 is not set
CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
CONFIG_HZ=250
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
# CONFIG_PREEMPT_BKL is not set
# CONFIG_KEXEC is not set
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32

#
# General setup
#
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
# CONFIG_IPC_NS is not set
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_BSD_PROCESS_ACCT=y
# CONFIG_BSD_PROCESS_ACCT_V3 is not set
# CONFIG_TASKSTATS is not set
# CONFIG_UTS_NS is not set
# CONFIG_AUDIT is not set
# CONFIG_IKCONFIG is not set
# CONFIG_CPUSETS is not set
CONFIG_SYSFS_DEPRECATED=y
# CONFIG_RELAY is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_EMBEDDED=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SHMEM=y
CONFIG_SLAB=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
# CONFIG_SLOB is not set

#
# Loadable module support
#
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_KMOD is not set
CONFIG_STOP_MACHINE=y

#
# Block layer
#
CONFIG_BLOCK=y
# CONFIG_BLK_DEV_IO_TRACE is not set

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_AS is not set
# CONFIG_IOSCHED_DEADLINE is not set
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"

#
# Bus options (PCI, PCMCIA, EISA, ISA, TC)
#
CONFIG_HW_HAS_PCI=y
CONFIG_PCI=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_DEBUG is not set
CONFIG_ISA=y
CONFIG_MMU=y

#
# PCCARD (PCMCIA/CardBus) support
#
# CONFIG_PCCARD is not set

#
# PCI Hotplug Support
#
# CONFIG_HOTPLUG_PCI is not set

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=y
CONFIG_BUILD_ELF64=y
CONFIG_MIPS32_COMPAT=y
CONFIG_COMPAT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_MIPS32_O32=y
CONFIG_MIPS32_N32=y
CONFIG_BINFMT_ELF32=y

#
# Power management options
#
# CONFIG_PM is not set

#
# Networking
#
CONFIG_NET=y

#
# Networking options
#
# CONFIG_NETDEBUG is not set
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
CONFIG_XFRM=y
CONFIG_XFRM_USER=m
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
CONFIG_NET_KEY=m
# CONFIG_NET_KEY_MIGRATE is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
# CONFIG_IP_PNP_BOOTP is not set
# CONFIG_IP_PNP_RARP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
CONFIG_INET_TUNNEL=m
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=m
# CONFIG_IPV6_PRIVACY is not set
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
CONFIG_INET6_XFRM_MODE_TUNNEL=m
CONFIG_INET6_XFRM_MODE_BEET=m
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
CONFIG_IPV6_SIT=m
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETFILTER is not set

#
# DCCP Configuration (EXPERIMENTAL)
#
# CONFIG_IP_DCCP is not set

#
# SCTP Configuration (EXPERIMENTAL)
#
# CONFIG_IP_SCTP is not set

#
# TIPC Configuration (EXPERIMENTAL)
#
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
CONFIG_BRIDGE=y
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
CONFIG_LLC=y
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set

#
# QoS and/or fair queueing
#
# CONFIG_NET_SCHED is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_IEEE80211 is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
# CONFIG_FW_LOADER is not set
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set

#
# Connector - unified userspace <-> kernelspace linker
#
# CONFIG_CONNECTOR is not set

#
# Memory Technology Devices (MTD)
#
CONFIG_MTD=y
# CONFIG_MTD_DEBUG is not set
# CONFIG_MTD_CONCAT is not set
CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_REDBOOT_PARTS is not set
CONFIG_MTD_CMDLINE_PARTS=y

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
CONFIG_MTD_JEDECPROBE=y
CONFIG_MTD_GEN_PROBE=y
CONFIG_MTD_CFI_ADV_OPTIONS=y
CONFIG_MTD_CFI_NOSWAP=y
# CONFIG_MTD_CFI_BE_BYTE_SWAP is not set
# CONFIG_MTD_CFI_LE_BYTE_SWAP is not set
CONFIG_MTD_CFI_GEOMETRY=y
CONFIG_MTD_MAP_BANK_WIDTH_1=y
# CONFIG_MTD_MAP_BANK_WIDTH_2 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_4 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
CONFIG_MTD_CFI_I1=y
# CONFIG_MTD_CFI_I2 is not set
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_I8 is not set
# CONFIG_MTD_OTP is not set
# CONFIG_MTD_CFI_INTELEXT is not set
CONFIG_MTD_CFI_AMDSTD=y
# CONFIG_MTD_CFI_STAA is not set
CONFIG_MTD_CFI_UTIL=y
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set
# CONFIG_MTD_OBSOLETE_CHIPS is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
# CONFIG_MTD_PHYSMAP is not set
# CONFIG_MTD_PLATRAM is not set

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_PMC551 is not set
CONFIG_MTD_SLRAM=y
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOC2000 is not set
# CONFIG_MTD_DOC2001 is not set
# CONFIG_MTD_DOC2001PLUS is not set

#
# NAND Flash Device Drivers
#
# CONFIG_MTD_NAND is not set

#
# OneNAND Flash Device Drivers
#
# CONFIG_MTD_ONENAND is not set

#
# Parallel port support
#
# CONFIG_PARPORT is not set

#
# Plug and Play support
#
# CONFIG_PNP is not set
# CONFIG_PNPACPI is not set

#
# Block devices
#
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=1
CONFIG_BLK_DEV_RAM_SIZE=500000
CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set

#
# Misc devices
#
# CONFIG_SGI_IOC4 is not set
# CONFIG_TIFM_CORE is not set

#
# ATA/ATAPI/MFM/RLL support
#
CONFIG_IDE=y
CONFIG_IDE_MAX_HWIFS=4
CONFIG_BLK_DEV_IDE=y

#
# Please see Documentation/ide.txt for help/info on IDE drives
#
# CONFIG_BLK_DEV_IDE_SATA is not set
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_IDEDISK_MULTI_MODE=y
CONFIG_BLK_DEV_IDECD=y
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI is not set
# CONFIG_IDE_TASK_IOCTL is not set

#
# IDE chipset support/bugfixes
#
# CONFIG_IDE_GENERIC is not set
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
# CONFIG_BLK_DEV_OFFBOARD is not set
# CONFIG_BLK_DEV_GENERIC is not set
# CONFIG_BLK_DEV_OPTI621 is not set
CONFIG_BLK_DEV_IDEDMA_PCI=y
# CONFIG_BLK_DEV_IDEDMA_FORCED is not set
# CONFIG_IDEDMA_ONLYDISK is not set
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD74XX is not set
CONFIG_BLK_DEV_CMD64X=y
# CONFIG_BLK_DEV_TRIFLEX is not set
# CONFIG_BLK_DEV_CY82C693 is not set
# CONFIG_BLK_DEV_CS5520 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_HPT34X is not set
# CONFIG_BLK_DEV_HPT366 is not set
# CONFIG_BLK_DEV_JMICRON is not set
# CONFIG_BLK_DEV_SC1200 is not set
# CONFIG_BLK_DEV_PIIX is not set
# CONFIG_BLK_DEV_IT8213 is not set
# CONFIG_BLK_DEV_IT821X is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_PDC202XX_OLD is not set
# CONFIG_BLK_DEV_PDC202XX_NEW is not set
# CONFIG_BLK_DEV_SVWKS is not set
# CONFIG_BLK_DEV_SIIMAGE is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
CONFIG_BLK_DEV_VIA82CXXX=y
# CONFIG_BLK_DEV_TC86C001 is not set
# CONFIG_IDE_ARM is not set
# CONFIG_IDE_CHIPSETS is not set
CONFIG_BLK_DEV_IDEDMA=y
# CONFIG_IDEDMA_IVB is not set
# CONFIG_BLK_DEV_HD is not set

#
# SCSI device support
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
# CONFIG_CHR_DEV_SG is not set
# CONFIG_CHR_DEV_SCH is not set

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
# CONFIG_SCSI_MULTI_LUN is not set
# CONFIG_SCSI_CONSTANTS is not set
# CONFIG_SCSI_LOGGING is not set
# CONFIG_SCSI_SCAN_ASYNC is not set

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
CONFIG_SCSI_SAS_ATTRS=y
# CONFIG_SCSI_SAS_LIBSAS is not set

#
# SCSI low-level drivers
#
# CONFIG_ISCSI_TCP is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC7XXX_OLD is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
# CONFIG_SCSI_IN2000 is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_DTC3280 is not set
# CONFIG_SCSI_FUTURE_DOMAIN is not set
# CONFIG_SCSI_GENERIC_NCR5380 is not set
# CONFIG_SCSI_GENERIC_NCR5380_MMIO is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_NCR53C406A is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
# CONFIG_SCSI_PAS16 is not set
# CONFIG_SCSI_PSI240I is not set
# CONFIG_SCSI_QLOGIC_FAS is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_QLA_FC is not set
# CONFIG_SCSI_QLA_ISCSI is not set
# CONFIG_SCSI_LPFC is not set
# CONFIG_SCSI_SYM53C416 is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_DC390T is not set
# CONFIG_SCSI_T128 is not set
# CONFIG_SCSI_DEBUG is not set
# CONFIG_SCSI_SRP is not set

#
# Serial ATA (prod) and Parallel ATA (experimental) drivers
#
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
# CONFIG_SATA_AHCI is not set
# CONFIG_SATA_SVW is not set
# CONFIG_ATA_PIIX is not set
CONFIG_SATA_MV=y
# CONFIG_SATA_NV is not set
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SX4 is not set
# CONFIG_SATA_SIL is not set
CONFIG_SATA_SIL24=y
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set
# CONFIG_SATA_INIC162X is not set
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CS5520 is not set
# CONFIG_PATA_CS5530 is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_LEGACY is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_QDI is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RZ1000 is not set
# CONFIG_PATA_SC1200 is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set
# CONFIG_PATA_WINBOND_VLB is not set
# CONFIG_PATA_PLATFORM is not set

#
# Old CD-ROM drivers (not SCSI, not IDE)
#
# CONFIG_CD_NO_IDESCSI is not set

#
# Multi-device support (RAID and LVM)
#
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
# CONFIG_MD_LINEAR is not set
CONFIG_MD_RAID0=y
CONFIG_MD_RAID1=y
CONFIG_MD_RAID10=y
CONFIG_MD_RAID456=y
CONFIG_MD_RAID5_RESHAPE=y
# CONFIG_MD_MULTIPATH is not set
# CONFIG_MD_FAULTY is not set
# CONFIG_BLK_DEV_DM is not set

#
# Fusion MPT device support
#
CONFIG_FUSION=y
# CONFIG_FUSION_SPI is not set
# CONFIG_FUSION_FC is not set
CONFIG_FUSION_SAS=y
CONFIG_FUSION_MAX_SGE=128
# CONFIG_FUSION_CTL is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_IEEE1394 is not set

#
# I2O device support
#
# CONFIG_I2O is not set

#
# Network device support
#
CONFIG_NETDEVICES=y
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set

#
# ARCnet devices
#
# CONFIG_ARCNET is not set

#
# PHY device support
#
# CONFIG_PHYLIB is not set

#
# Ethernet (10 or 100Mbit)
#
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_NET_VENDOR_SMC is not set
# CONFIG_DM9000 is not set
# CONFIG_NET_VENDOR_RACAL is not set

#
# Tulip family network device support
#
# CONFIG_NET_TULIP is not set
# CONFIG_AT1700 is not set
# CONFIG_DEPCA is not set
# CONFIG_HP100 is not set
# CONFIG_NET_ISA is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_AMD8111_ETH is not set
# CONFIG_ADAPTEC_STARFIRE is not set
# CONFIG_AC3200 is not set
# CONFIG_APRICOT is not set
# CONFIG_B44 is not set
# CONFIG_FORCEDETH is not set
# CONFIG_CS89x0 is not set
# CONFIG_DGRS is not set
# CONFIG_EEPRO100 is not set
# CONFIG_E100 is not set
# CONFIG_FEALNX is not set
CONFIG_NATSEMI=y
# CONFIG_NE2K_PCI is not set
# CONFIG_8139CP is not set
CONFIG_8139TOO=y
CONFIG_8139TOO_PIO=y
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SUNDANCE is not set
CONFIG_VIA_RHINE=y
CONFIG_VIA_RHINE_MMIO=y
# CONFIG_VIA_RHINE_NAPI is not set
# CONFIG_SC92031 is not set

#
# Ethernet (1000 Mbit)
#
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
CONFIG_E1000=y
CONFIG_E1000_NAPI=y
# CONFIG_E1000_DISABLE_PACKET_SPLIT is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_R8169 is not set
# CONFIG_SIS190 is not set
# CONFIG_SKGE is not set
CONFIG_SKY2=y
# CONFIG_SK98LIN is not set
# CONFIG_VIA_VELOCITY is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set

#
# Ethernet (10000 Mbit)
#
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set
# CONFIG_MYRI10GE is not set
# CONFIG_NETXEN_NIC is not set

#
# Token Ring devices
#
# CONFIG_TR is not set

#
# Wireless LAN (non-hamradio)
#
# CONFIG_NET_RADIO is not set

#
# Wan interfaces
#
# CONFIG_WAN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NET_FC is not set
# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set

#
# ISDN subsystem
#
# CONFIG_ISDN is not set

#
# Telephony Support
#
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_TSDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_INPORT is not set
# CONFIG_MOUSE_LOGIBM is not set
# CONFIG_MOUSE_PC110PAD is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
# CONFIG_SERIO_I8042 is not set
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
# CONFIG_SERIAL_NONSTANDARD is not set

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
# CONFIG_SERIAL_8250_MANY_PORTS is not set
CONFIG_SERIAL_8250_SHARE_IRQ=y
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
# CONFIG_SERIAL_8250_RSA is not set

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256

#
# IPMI
#
# CONFIG_IPMI_HANDLER is not set

#
# Watchdog Cards
#
# CONFIG_WATCHDOG is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_RTC is not set
# CONFIG_GEN_RTC is not set
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
CONFIG_DRM=y
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_R128 is not set
CONFIG_DRM_RADEON=y
# CONFIG_DRM_MGA is not set
# CONFIG_DRM_VIA is not set
# CONFIG_DRM_SAVAGE is not set
# CONFIG_RAW_DRIVER is not set

#
# TPM devices
#
# CONFIG_TCG_TPM is not set

#
# I2C support
#
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y

#
# I2C Algorithms
#
CONFIG_I2C_ALGOBIT=y
# CONFIG_I2C_ALGOPCF is not set
# CONFIG_I2C_ALGOPCA is not set

#
# I2C Hardware Bus support
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
# CONFIG_I2C_I801 is not set
# CONFIG_I2C_I810 is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_PROSAVAGE is not set
# CONFIG_I2C_SAVAGE4 is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set
# CONFIG_I2C_VOODOO3 is not set
# CONFIG_I2C_PCA_ISA is not set

#
# Miscellaneous I2C Chip support
#
# CONFIG_SENSORS_DS1337 is not set
# CONFIG_SENSORS_DS1374 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_SENSORS_PCA9539 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set

#
# SPI support
#
# CONFIG_SPI is not set
# CONFIG_SPI_MASTER is not set

#
# Dallas's 1-wire bus
#
# CONFIG_W1 is not set

#
# Hardware Monitoring support
#
# CONFIG_HWMON is not set
# CONFIG_HWMON_VID is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_SM501 is not set

#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set

#
# Digital Video Broadcasting Devices
#
# CONFIG_DVB is not set
# CONFIG_USB_DABUSB is not set

#
# Graphics support
#
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
CONFIG_FB_DDC=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_SVGALIB is not set
# CONFIG_FB_MACMODES is not set
# CONFIG_FB_BACKLIGHT is not set
CONFIG_FB_MODE_HELPERS=y
# CONFIG_FB_TILEBLITTING is not set

#
# Frame buffer hardware drivers
#
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_MATROX is not set
CONFIG_FB_RADEON=y
CONFIG_FB_RADEON_I2C=y
# CONFIG_FB_RADEON_BACKLIGHT is not set
# CONFIG_FB_RADEON_DEBUG is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_S3 is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_SMIVGX is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_VIRTUAL is not set

#
# Console display driver support
#
# CONFIG_VGA_CONSOLE is not set
# CONFIG_MDA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y

#
# Logo configuration
#
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
CONFIG_LOGO_LINUX_CLUT224=y

#
# Sound
#
# CONFIG_SOUND is not set

#
# HID Devices
#
CONFIG_HID=y
# CONFIG_HID_DEBUG is not set

#
# USB support
#
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_OTG is not set

#
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_SPLIT_ISO is not set
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
# CONFIG_USB_EHCI_BIG_ENDIAN_MMIO is not set
# CONFIG_USB_ISP116X_HCD is not set
CONFIG_USB_OHCI_HCD=y
# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
CONFIG_USB_DWC_OTG=y

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set

#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#

#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_LIBUSUAL is not set

#
# USB Input Devices
#
CONFIG_USB_HID=y
# CONFIG_USB_HIDINPUT_POWERBOOK is not set
# CONFIG_HID_FF is not set
# CONFIG_USB_HIDDEV is not set
# CONFIG_USB_AIPTEK is not set
# CONFIG_USB_WACOM is not set
# CONFIG_USB_ACECAD is not set
# CONFIG_USB_KBTAB is not set
# CONFIG_USB_POWERMATE is not set
# CONFIG_USB_TOUCHSCREEN is not set
# CONFIG_USB_YEALINK is not set
# CONFIG_USB_XPAD is not set
# CONFIG_USB_ATI_REMOTE is not set
# CONFIG_USB_ATI_REMOTE2 is not set
# CONFIG_USB_KEYSPAN_REMOTE is not set
# CONFIG_USB_APPLETOUCH is not set
# CONFIG_USB_GTCO is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET_MII is not set
# CONFIG_USB_USBNET is not set
CONFIG_USB_MON=y

#
# USB port drivers
#

#
# USB Serial Converter support
#
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_AUERSWALD is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_BERRY_CHARGE is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_PHIDGET is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set

#
# USB DSL modem support
#

#
# USB Gadget Support
#
# CONFIG_USB_GADGET is not set

#
# MMC/SD Card support
#
# CONFIG_MMC is not set

#
# LED devices
#
# CONFIG_NEW_LEDS is not set

#
# LED drivers
#

#
# LED Triggers
#

#
# InfiniBand support
#
# CONFIG_INFINIBAND is not set

#
# EDAC - error detection and reporting (RAS) (EXPERIMENTAL)
#

#
# Real Time Clock
#
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
# CONFIG_RTC_HCTOSYS is not set
CONFIG_RTC_DEBUG=y

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set

#
# RTC drivers
#
# CONFIG_RTC_DRV_X1205 is not set
CONFIG_RTC_DRV_DS1307=y
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_DS1672 is not set
CONFIG_RTC_DRV_DS1742=y
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_TEST is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# DMA Engine support
#
CONFIG_DMA_ENGINE=y

#
# DMA Clients
#
# CONFIG_NET_DMA is not set

#
# DMA Devices
#
# CONFIG_INTEL_IOATDMA is not set

#
# Auxiliary Display support
#

#
# Virtualization
#

#
# File systems
#
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
# CONFIG_EXT3_FS_POSIX_ACL is not set
# CONFIG_EXT3_FS_SECURITY is not set
# CONFIG_EXT4DEV_FS is not set
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_FS_POSIX_ACL is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
CONFIG_DNOTIFY=y
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
# CONFIG_ZISOFS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
# CONFIG_MSDOS_FS is not set
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_RAMFS=y
# CONFIG_CONFIGFS_FS is not set

#
# Miscellaneous filesystems
#
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_FS_DEBUG=0
CONFIG_JFFS2_FS_WRITEBUFFER=y
# CONFIG_JFFS2_SUMMARY is not set
# CONFIG_JFFS2_FS_XATTR is not set
# CONFIG_JFFS2_COMPRESSION_OPTIONS is not set
CONFIG_JFFS2_ZLIB=y
CONFIG_JFFS2_RTIME=y
# CONFIG_JFFS2_RUBIN is not set
CONFIG_CRAMFS=y
# CONFIG_VXFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set

#
# Network File Systems
#
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
# CONFIG_NFS_V3_ACL is not set
# CONFIG_NFS_V4 is not set
# CONFIG_NFS_DIRECTIO is not set
# CONFIG_NFSD is not set
CONFIG_ROOT_NFS=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
# CONFIG_RPCSEC_GSS_KRB5 is not set
# CONFIG_RPCSEC_GSS_SPKM3 is not set
# CONFIG_SMB_FS is not set
# CONFIG_CIFS is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
# CONFIG_9P_FS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y

#
# Native Language Support
#
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_UTF8 is not set

#
# Distributed Lock Manager
#
# CONFIG_DLM is not set

#
# Profiling support
#
CONFIG_PROFILING=y
CONFIG_OPROFILE=y

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_PRINTK_TIME is not set
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_MAGIC_SYSRQ=y
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_HEADERS_CHECK is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
CONFIG_LOG_BUF_SHIFT=15
# CONFIG_DETECT_SOFTLOCKUP is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_SLAB is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_INFO=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_LIST is not set
CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_CROSSCOMPILE is not set
CONFIG_CMDLINE=""
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_KGDB is not set
CONFIG_SYS_SUPPORTS_KGDB=y
# CONFIG_RUNTIME_DEBUG is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
CONFIG_XOR_BLOCKS=y
CONFIG_ASYNC_CORE=y
CONFIG_ASYNC_MEMCPY=y
CONFIG_ASYNC_XOR=y
CONFIG_ASYNC_PQXOR=y
CONFIG_ASYNC_R6RECOV=y

#
# Cryptographic options
#
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_BLKCIPHER=m
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_XCBC is not set
CONFIG_CRYPTO_NULL=m
# CONFIG_CRYPTO_MD4 is not set
CONFIG_CRYPTO_MD5=m
CONFIG_CRYPTO_SHA1=m
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_WP512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_GF128MUL is not set
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_CBC=m
CONFIG_CRYPTO_PCBC=m
# CONFIG_CRYPTO_LRW is not set
CONFIG_CRYPTO_DES=m
# CONFIG_CRYPTO_FCRYPT is not set
CONFIG_CRYPTO_BLOWFISH=m
# CONFIG_CRYPTO_TWOFISH is not set
# CONFIG_CRYPTO_SERPENT is not set
CONFIG_CRYPTO_AES=m
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_ARC4 is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_DEFLATE is not set
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_TEST is not set

#
# Hardware crypto devices
#

#
# Library routines
#
CONFIG_BITREVERSE=y
# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
CONFIG_CRC32=y
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y