* Adding a disk to RAID0
@ 2012-02-28 23:34 Victor Balakine
2012-03-05 23:35 ` Victor Balakine
0 siblings, 1 reply; 5+ messages in thread
From: Victor Balakine @ 2012-02-28 23:34 UTC (permalink / raw)
To: linux-raid
I am trying to add another disk to RAID0 and this functionality appears
to be broken.
First I create a RAID0 array:
#mdadm --create /dev/md0 --level=0 --raid-devices=1 --force /dev/xvda2
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
So far everything works fine. Then I add another disk to it:
#mdadm --grow /dev/md0 --raid-devices=2 --add /dev/xvda3
--backup-file=/backup-md0
mdadm: level of /dev/md0 changed to raid4
mdadm: added /dev/xvda3
mdadm: Need to backup 1024K of critical section..
This is what I see in /var/log/messages
Feb 28 15:03:30 storage kernel: [ 1420.174022] md: bind<xvda2>
Feb 28 15:03:30 storage kernel: [ 1420.209167] md: raid0 personality
registered for level 0
Feb 28 15:03:30 storage kernel: [ 1420.209818] bio: create slab <bio-1> at 1
Feb 28 15:03:30 storage kernel: [ 1420.209832] md/raid0:md0: looking at
xvda2
Feb 28 15:03:30 storage kernel: [ 1420.209837] md/raid0:md0: comparing
xvda2(8386560) with xvda2(8386560)
Feb 28 15:03:30 storage kernel: [ 1420.209844] md/raid0:md0: END
Feb 28 15:03:30 storage kernel: [ 1420.209851] md/raid0:md0: ==> UNIQUE
Feb 28 15:03:30 storage kernel: [ 1420.209856] md/raid0:md0: 1 zones
Feb 28 15:03:30 storage kernel: [ 1420.209859] md/raid0:md0: FINAL 1 zones
Feb 28 15:03:30 storage kernel: [ 1420.209866] md/raid0:md0: done.
Feb 28 15:03:30 storage kernel: [ 1420.209870] md/raid0:md0: md_size is
8386560 sectors.
Feb 28 15:03:30 storage kernel: [ 1420.209875] ******* md0 configuration
*********
Feb 28 15:03:30 storage kernel: [ 1420.209879] zone0=[xvda2/]
Feb 28 15:03:30 storage kernel: [ 1420.209885] zone offset=0kb
device offset=0kb size=4193280kb
Feb 28 15:03:30 storage kernel: [ 1420.209902]
**********************************
Feb 28 15:03:30 storage kernel: [ 1420.209903]
Feb 28 15:03:30 storage kernel: [ 1420.209919] md0: detected capacity
change from 0 to 4293918720
Feb 28 15:03:30 storage kernel: [ 1420.223968] md0: p1
...
Feb 28 15:04:01 storage kernel: [ 1450.783016] async_tx: api initialized
(async)
Feb 28 15:04:01 storage kernel: [ 1450.796912] xor: automatically using
best checksumming function: generic_sse
Feb 28 15:04:01 storage kernel: [ 1450.816012] generic_sse: 9509.000
MB/sec
Feb 28 15:04:01 storage kernel: [ 1450.816021] xor: using function:
generic_sse (9509.000 MB/sec)
Feb 28 15:04:01 storage kernel: [ 1450.912021] raid6: int64x1 1888 MB/s
Feb 28 15:04:01 storage kernel: [ 1450.980013] raid6: int64x2 2707 MB/s
Feb 28 15:04:01 storage kernel: [ 1451.048025] raid6: int64x4 2073 MB/s
Feb 28 15:04:01 storage kernel: [ 1451.116039] raid6: int64x8 2010 MB/s
Feb 28 15:04:01 storage kernel: [ 1451.184017] raid6: sse2x1 4764 MB/s
Feb 28 15:04:01 storage kernel: [ 1451.252018] raid6: sse2x2 5170 MB/s
Feb 28 15:04:01 storage kernel: [ 1451.320016] raid6: sse2x4 7548 MB/s
Feb 28 15:04:01 storage kernel: [ 1451.320025] raid6: using algorithm
sse2x4 (7548 MB/s)
Feb 28 15:04:01 storage kernel: [ 1451.330136] md: raid6 personality
registered for level 6
Feb 28 15:04:01 storage kernel: [ 1451.330145] md: raid5 personality
registered for level 5
Feb 28 15:04:01 storage kernel: [ 1451.330149] md: raid4 personality
registered for level 4
Feb 28 15:04:01 storage kernel: [ 1451.330662] md/raid:md0: device xvda2
operational as raid disk 0
Feb 28 15:04:01 storage kernel: [ 1451.330820] md/raid:md0: allocated 2176kB
Feb 28 15:04:01 storage kernel: [ 1451.330869] md/raid:md0: raid level 4
active with 1 out of 2 devices, algorithm 5
Feb 28 15:04:01 storage kernel: [ 1451.330874] RAID conf printout:
Feb 28 15:04:01 storage kernel: [ 1451.330876] --- level:4 rd:2 wd:1
Feb 28 15:04:01 storage kernel: [ 1451.330878] disk 0, o:1, dev:xvda2
Feb 28 15:04:01 storage kernel: [ 1451.417995] md: bind<xvda3>
Feb 28 15:04:01 storage kernel: [ 1451.616399] RAID conf printout:
Feb 28 15:04:01 storage kernel: [ 1451.616404] --- level:4 rd:3 wd:2
Feb 28 15:04:01 storage kernel: [ 1451.616408] disk 0, o:1, dev:xvda2
Feb 28 15:04:01 storage kernel: [ 1451.616411] disk 1, o:1, dev:xvda3
Feb 28 15:04:01 storage kernel: [ 1451.619054] md: reshape of RAID array md0
Feb 28 15:04:01 storage kernel: [ 1451.619066] md: minimum _guaranteed_
speed: 1000 KB/sec/disk.
Feb 28 15:04:01 storage kernel: [ 1451.619069] md: using maximum
available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
Feb 28 15:04:01 storage kernel: [ 1451.619075] md: using 128k window,
over a total of 4193280k.
Feb 28 15:05:02 storage udevd[280]: timeout '/sbin/blkid -o udev -p
/dev/md0'
Feb 28 15:05:03 storage udevd[280]: timeout: killing '/sbin/blkid -o
udev -p /dev/md0' [1829]
Feb 28 15:05:04 storage udevd[280]: timeout: killing '/sbin/blkid -o
udev -p /dev/md0' [1829]
Feb 28 15:05:05 storage udevd[280]: timeout: killing '/sbin/blkid -o
udev -p /dev/md0' [1829]
And then it just goes on forever. md0_raid0 process stays at 100% CPU load.
# ps -ef | grep md0
root 7268 2 99 09:34 ? 05:53:00 [md0_raid0]
root 7270 2 0 09:34 ? 00:00:00 [md0_reshape]
root 7271 1 0 09:34 pts/0 00:00:00 mdadm --grow /dev/md0
--raid-devices=2 --add /dev/sdc1 --backup-file=/backup-md0
# cat /proc/mdstat
Personalities : [raid0] [raid6] [raid5] [raid4]
md0 : active raid4 xvda3[2] xvda2[0]
4193280 blocks super 1.2 level 4, 512k chunk, algorithm 5 [3/1] [U__]
resync=DELAYED
unused devices: <none>
# mdadm --version
mdadm - v3.2.2 - 17th June 2011
# uname -a
Linux storage 3.1.9-1.4-xen #1 SMP Fri Jan 27 08:55:10 UTC 2012
(efb5ff4) x86_64 x86_64 x86_64 GNU/Linux
It's OpenSUSE 12.1 with all the latest updates running in XEN that I
created to reproduce the problem. The actual server is running the same
version of OpenSUSE (Linux san1 3.1.9-1.4-desktop #1 SMP PREEMPT Fri Jan
27 08:55:10 UTC 2012 (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux) on a
hardware server. If you need any more information I can easily get it
since it's a VM and the problem is easily reproducible.
Victor
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Adding a disk to RAID0
2012-02-28 23:34 Adding a disk to RAID0 Victor Balakine
@ 2012-03-05 23:35 ` Victor Balakine
2012-03-06 1:21 ` NeilBrown
0 siblings, 1 reply; 5+ messages in thread
From: Victor Balakine @ 2012-03-05 23:35 UTC (permalink / raw)
To: linux-raid
Am I the only one having problem adding disks to RAID0? Has anybody
tried that on 3.* kernel?
Victor
On 2012-02-28 15:34, Victor Balakine wrote:
> I am trying to add another disk to RAID0 and this functionality appears
> to be broken.
> First I create a RAID0 array:
> #mdadm --create /dev/md0 --level=0 --raid-devices=1 --force /dev/xvda2
> mdadm: Defaulting to version 1.2 metadata
> mdadm: array /dev/md0 started.
>
> So far everything works fine. Then I add another disk to it:
> #mdadm --grow /dev/md0 --raid-devices=2 --add /dev/xvda3
> --backup-file=/backup-md0
> mdadm: level of /dev/md0 changed to raid4
> mdadm: added /dev/xvda3
> mdadm: Need to backup 1024K of critical section..
>
> This is what I see in /var/log/messages
> Feb 28 15:03:30 storage kernel: [ 1420.174022] md: bind<xvda2>
> Feb 28 15:03:30 storage kernel: [ 1420.209167] md: raid0 personality
> registered for level 0
> Feb 28 15:03:30 storage kernel: [ 1420.209818] bio: create slab <bio-1>
> at 1
> Feb 28 15:03:30 storage kernel: [ 1420.209832] md/raid0:md0: looking at
> xvda2
> Feb 28 15:03:30 storage kernel: [ 1420.209837] md/raid0:md0: comparing
> xvda2(8386560) with xvda2(8386560)
> Feb 28 15:03:30 storage kernel: [ 1420.209844] md/raid0:md0: END
> Feb 28 15:03:30 storage kernel: [ 1420.209851] md/raid0:md0: ==> UNIQUE
> Feb 28 15:03:30 storage kernel: [ 1420.209856] md/raid0:md0: 1 zones
> Feb 28 15:03:30 storage kernel: [ 1420.209859] md/raid0:md0: FINAL 1 zones
> Feb 28 15:03:30 storage kernel: [ 1420.209866] md/raid0:md0: done.
> Feb 28 15:03:30 storage kernel: [ 1420.209870] md/raid0:md0: md_size is
> 8386560 sectors.
> Feb 28 15:03:30 storage kernel: [ 1420.209875] ******* md0 configuration
> *********
> Feb 28 15:03:30 storage kernel: [ 1420.209879] zone0=[xvda2/]
> Feb 28 15:03:30 storage kernel: [ 1420.209885] zone offset=0kb device
> offset=0kb size=4193280kb
> Feb 28 15:03:30 storage kernel: [ 1420.209902]
> **********************************
> Feb 28 15:03:30 storage kernel: [ 1420.209903]
> Feb 28 15:03:30 storage kernel: [ 1420.209919] md0: detected capacity
> change from 0 to 4293918720
> Feb 28 15:03:30 storage kernel: [ 1420.223968] md0: p1
> ...
> Feb 28 15:04:01 storage kernel: [ 1450.783016] async_tx: api initialized
> (async)
> Feb 28 15:04:01 storage kernel: [ 1450.796912] xor: automatically using
> best checksumming function: generic_sse
> Feb 28 15:04:01 storage kernel: [ 1450.816012] generic_sse: 9509.000 MB/sec
> Feb 28 15:04:01 storage kernel: [ 1450.816021] xor: using function:
> generic_sse (9509.000 MB/sec)
> Feb 28 15:04:01 storage kernel: [ 1450.912021] raid6: int64x1 1888 MB/s
> Feb 28 15:04:01 storage kernel: [ 1450.980013] raid6: int64x2 2707 MB/s
> Feb 28 15:04:01 storage kernel: [ 1451.048025] raid6: int64x4 2073 MB/s
> Feb 28 15:04:01 storage kernel: [ 1451.116039] raid6: int64x8 2010 MB/s
> Feb 28 15:04:01 storage kernel: [ 1451.184017] raid6: sse2x1 4764 MB/s
> Feb 28 15:04:01 storage kernel: [ 1451.252018] raid6: sse2x2 5170 MB/s
> Feb 28 15:04:01 storage kernel: [ 1451.320016] raid6: sse2x4 7548 MB/s
> Feb 28 15:04:01 storage kernel: [ 1451.320025] raid6: using algorithm
> sse2x4 (7548 MB/s)
> Feb 28 15:04:01 storage kernel: [ 1451.330136] md: raid6 personality
> registered for level 6
> Feb 28 15:04:01 storage kernel: [ 1451.330145] md: raid5 personality
> registered for level 5
> Feb 28 15:04:01 storage kernel: [ 1451.330149] md: raid4 personality
> registered for level 4
> Feb 28 15:04:01 storage kernel: [ 1451.330662] md/raid:md0: device xvda2
> operational as raid disk 0
> Feb 28 15:04:01 storage kernel: [ 1451.330820] md/raid:md0: allocated
> 2176kB
> Feb 28 15:04:01 storage kernel: [ 1451.330869] md/raid:md0: raid level 4
> active with 1 out of 2 devices, algorithm 5
> Feb 28 15:04:01 storage kernel: [ 1451.330874] RAID conf printout:
> Feb 28 15:04:01 storage kernel: [ 1451.330876] --- level:4 rd:2 wd:1
> Feb 28 15:04:01 storage kernel: [ 1451.330878] disk 0, o:1, dev:xvda2
> Feb 28 15:04:01 storage kernel: [ 1451.417995] md: bind<xvda3>
> Feb 28 15:04:01 storage kernel: [ 1451.616399] RAID conf printout:
> Feb 28 15:04:01 storage kernel: [ 1451.616404] --- level:4 rd:3 wd:2
> Feb 28 15:04:01 storage kernel: [ 1451.616408] disk 0, o:1, dev:xvda2
> Feb 28 15:04:01 storage kernel: [ 1451.616411] disk 1, o:1, dev:xvda3
> Feb 28 15:04:01 storage kernel: [ 1451.619054] md: reshape of RAID array
> md0
> Feb 28 15:04:01 storage kernel: [ 1451.619066] md: minimum _guaranteed_
> speed: 1000 KB/sec/disk.
> Feb 28 15:04:01 storage kernel: [ 1451.619069] md: using maximum
> available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
> Feb 28 15:04:01 storage kernel: [ 1451.619075] md: using 128k window,
> over a total of 4193280k.
> Feb 28 15:05:02 storage udevd[280]: timeout '/sbin/blkid -o udev -p
> /dev/md0'
> Feb 28 15:05:03 storage udevd[280]: timeout: killing '/sbin/blkid -o
> udev -p /dev/md0' [1829]
> Feb 28 15:05:04 storage udevd[280]: timeout: killing '/sbin/blkid -o
> udev -p /dev/md0' [1829]
> Feb 28 15:05:05 storage udevd[280]: timeout: killing '/sbin/blkid -o
> udev -p /dev/md0' [1829]
>
> And then it just goes on forever. md0_raid0 process stays at 100% CPU load.
> # ps -ef | grep md0
> root 7268 2 99 09:34 ? 05:53:00 [md0_raid0]
> root 7270 2 0 09:34 ? 00:00:00 [md0_reshape]
> root 7271 1 0 09:34 pts/0 00:00:00 mdadm --grow /dev/md0
> --raid-devices=2 --add /dev/sdc1 --backup-file=/backup-md0
>
> # cat /proc/mdstat
> Personalities : [raid0] [raid6] [raid5] [raid4]
> md0 : active raid4 xvda3[2] xvda2[0]
> 4193280 blocks super 1.2 level 4, 512k chunk, algorithm 5 [3/1] [U__]
> resync=DELAYED
>
> unused devices: <none>
>
> # mdadm --version
> mdadm - v3.2.2 - 17th June 2011
> # uname -a
> Linux storage 3.1.9-1.4-xen #1 SMP Fri Jan 27 08:55:10 UTC 2012
> (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux
>
> It's OpenSUSE 12.1 with all the latest updates running in XEN that I
> created to reproduce the problem. The actual server is running the same
> version of OpenSUSE (Linux san1 3.1.9-1.4-desktop #1 SMP PREEMPT Fri Jan
> 27 08:55:10 UTC 2012 (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux) on a
> hardware server. If you need any more information I can easily get it
> since it's a VM and the problem is easily reproducible.
>
> Victor
> --
> 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
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Adding a disk to RAID0
2012-03-05 23:35 ` Victor Balakine
@ 2012-03-06 1:21 ` NeilBrown
2012-03-06 19:10 ` Victor Balakine
0 siblings, 1 reply; 5+ messages in thread
From: NeilBrown @ 2012-03-06 1:21 UTC (permalink / raw)
To: Victor Balakine; +Cc: linux-raid
[-- Attachment #1: Type: text/plain, Size: 7349 bytes --]
On Mon, 05 Mar 2012 15:35:15 -0800 Victor Balakine <victor.balakine@ubc.ca>
wrote:
> Am I the only one having problem adding disks to RAID0? Has anybody
> tried that on 3.* kernel?
Strange. It works for me.
We need to find out what the md0_raid0 process is doing.
Can you
cat /proc/PROCESSID/stack
and see what that shows?
NeilBrown
>
> Victor
>
> On 2012-02-28 15:34, Victor Balakine wrote:
> > I am trying to add another disk to RAID0 and this functionality appears
> > to be broken.
> > First I create a RAID0 array:
> > #mdadm --create /dev/md0 --level=0 --raid-devices=1 --force /dev/xvda2
> > mdadm: Defaulting to version 1.2 metadata
> > mdadm: array /dev/md0 started.
> >
> > So far everything works fine. Then I add another disk to it:
> > #mdadm --grow /dev/md0 --raid-devices=2 --add /dev/xvda3
> > --backup-file=/backup-md0
> > mdadm: level of /dev/md0 changed to raid4
> > mdadm: added /dev/xvda3
> > mdadm: Need to backup 1024K of critical section..
> >
> > This is what I see in /var/log/messages
> > Feb 28 15:03:30 storage kernel: [ 1420.174022] md: bind<xvda2>
> > Feb 28 15:03:30 storage kernel: [ 1420.209167] md: raid0 personality
> > registered for level 0
> > Feb 28 15:03:30 storage kernel: [ 1420.209818] bio: create slab <bio-1>
> > at 1
> > Feb 28 15:03:30 storage kernel: [ 1420.209832] md/raid0:md0: looking at
> > xvda2
> > Feb 28 15:03:30 storage kernel: [ 1420.209837] md/raid0:md0: comparing
> > xvda2(8386560) with xvda2(8386560)
> > Feb 28 15:03:30 storage kernel: [ 1420.209844] md/raid0:md0: END
> > Feb 28 15:03:30 storage kernel: [ 1420.209851] md/raid0:md0: ==> UNIQUE
> > Feb 28 15:03:30 storage kernel: [ 1420.209856] md/raid0:md0: 1 zones
> > Feb 28 15:03:30 storage kernel: [ 1420.209859] md/raid0:md0: FINAL 1 zones
> > Feb 28 15:03:30 storage kernel: [ 1420.209866] md/raid0:md0: done.
> > Feb 28 15:03:30 storage kernel: [ 1420.209870] md/raid0:md0: md_size is
> > 8386560 sectors.
> > Feb 28 15:03:30 storage kernel: [ 1420.209875] ******* md0 configuration
> > *********
> > Feb 28 15:03:30 storage kernel: [ 1420.209879] zone0=[xvda2/]
> > Feb 28 15:03:30 storage kernel: [ 1420.209885] zone offset=0kb device
> > offset=0kb size=4193280kb
> > Feb 28 15:03:30 storage kernel: [ 1420.209902]
> > **********************************
> > Feb 28 15:03:30 storage kernel: [ 1420.209903]
> > Feb 28 15:03:30 storage kernel: [ 1420.209919] md0: detected capacity
> > change from 0 to 4293918720
> > Feb 28 15:03:30 storage kernel: [ 1420.223968] md0: p1
> > ...
> > Feb 28 15:04:01 storage kernel: [ 1450.783016] async_tx: api initialized
> > (async)
> > Feb 28 15:04:01 storage kernel: [ 1450.796912] xor: automatically using
> > best checksumming function: generic_sse
> > Feb 28 15:04:01 storage kernel: [ 1450.816012] generic_sse: 9509.000 MB/sec
> > Feb 28 15:04:01 storage kernel: [ 1450.816021] xor: using function:
> > generic_sse (9509.000 MB/sec)
> > Feb 28 15:04:01 storage kernel: [ 1450.912021] raid6: int64x1 1888 MB/s
> > Feb 28 15:04:01 storage kernel: [ 1450.980013] raid6: int64x2 2707 MB/s
> > Feb 28 15:04:01 storage kernel: [ 1451.048025] raid6: int64x4 2073 MB/s
> > Feb 28 15:04:01 storage kernel: [ 1451.116039] raid6: int64x8 2010 MB/s
> > Feb 28 15:04:01 storage kernel: [ 1451.184017] raid6: sse2x1 4764 MB/s
> > Feb 28 15:04:01 storage kernel: [ 1451.252018] raid6: sse2x2 5170 MB/s
> > Feb 28 15:04:01 storage kernel: [ 1451.320016] raid6: sse2x4 7548 MB/s
> > Feb 28 15:04:01 storage kernel: [ 1451.320025] raid6: using algorithm
> > sse2x4 (7548 MB/s)
> > Feb 28 15:04:01 storage kernel: [ 1451.330136] md: raid6 personality
> > registered for level 6
> > Feb 28 15:04:01 storage kernel: [ 1451.330145] md: raid5 personality
> > registered for level 5
> > Feb 28 15:04:01 storage kernel: [ 1451.330149] md: raid4 personality
> > registered for level 4
> > Feb 28 15:04:01 storage kernel: [ 1451.330662] md/raid:md0: device xvda2
> > operational as raid disk 0
> > Feb 28 15:04:01 storage kernel: [ 1451.330820] md/raid:md0: allocated
> > 2176kB
> > Feb 28 15:04:01 storage kernel: [ 1451.330869] md/raid:md0: raid level 4
> > active with 1 out of 2 devices, algorithm 5
> > Feb 28 15:04:01 storage kernel: [ 1451.330874] RAID conf printout:
> > Feb 28 15:04:01 storage kernel: [ 1451.330876] --- level:4 rd:2 wd:1
> > Feb 28 15:04:01 storage kernel: [ 1451.330878] disk 0, o:1, dev:xvda2
> > Feb 28 15:04:01 storage kernel: [ 1451.417995] md: bind<xvda3>
> > Feb 28 15:04:01 storage kernel: [ 1451.616399] RAID conf printout:
> > Feb 28 15:04:01 storage kernel: [ 1451.616404] --- level:4 rd:3 wd:2
> > Feb 28 15:04:01 storage kernel: [ 1451.616408] disk 0, o:1, dev:xvda2
> > Feb 28 15:04:01 storage kernel: [ 1451.616411] disk 1, o:1, dev:xvda3
> > Feb 28 15:04:01 storage kernel: [ 1451.619054] md: reshape of RAID array
> > md0
> > Feb 28 15:04:01 storage kernel: [ 1451.619066] md: minimum _guaranteed_
> > speed: 1000 KB/sec/disk.
> > Feb 28 15:04:01 storage kernel: [ 1451.619069] md: using maximum
> > available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
> > Feb 28 15:04:01 storage kernel: [ 1451.619075] md: using 128k window,
> > over a total of 4193280k.
> > Feb 28 15:05:02 storage udevd[280]: timeout '/sbin/blkid -o udev -p
> > /dev/md0'
> > Feb 28 15:05:03 storage udevd[280]: timeout: killing '/sbin/blkid -o
> > udev -p /dev/md0' [1829]
> > Feb 28 15:05:04 storage udevd[280]: timeout: killing '/sbin/blkid -o
> > udev -p /dev/md0' [1829]
> > Feb 28 15:05:05 storage udevd[280]: timeout: killing '/sbin/blkid -o
> > udev -p /dev/md0' [1829]
> >
> > And then it just goes on forever. md0_raid0 process stays at 100% CPU load.
> > # ps -ef | grep md0
> > root 7268 2 99 09:34 ? 05:53:00 [md0_raid0]
> > root 7270 2 0 09:34 ? 00:00:00 [md0_reshape]
> > root 7271 1 0 09:34 pts/0 00:00:00 mdadm --grow /dev/md0
> > --raid-devices=2 --add /dev/sdc1 --backup-file=/backup-md0
> >
> > # cat /proc/mdstat
> > Personalities : [raid0] [raid6] [raid5] [raid4]
> > md0 : active raid4 xvda3[2] xvda2[0]
> > 4193280 blocks super 1.2 level 4, 512k chunk, algorithm 5 [3/1] [U__]
> > resync=DELAYED
> >
> > unused devices: <none>
> >
> > # mdadm --version
> > mdadm - v3.2.2 - 17th June 2011
> > # uname -a
> > Linux storage 3.1.9-1.4-xen #1 SMP Fri Jan 27 08:55:10 UTC 2012
> > (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux
> >
> > It's OpenSUSE 12.1 with all the latest updates running in XEN that I
> > created to reproduce the problem. The actual server is running the same
> > version of OpenSUSE (Linux san1 3.1.9-1.4-desktop #1 SMP PREEMPT Fri Jan
> > 27 08:55:10 UTC 2012 (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux) on a
> > hardware server. If you need any more information I can easily get it
> > since it's a VM and the problem is easily reproducible.
> >
> > Victor
> > --
> > 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
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 828 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Adding a disk to RAID0
2012-03-06 1:21 ` NeilBrown
@ 2012-03-06 19:10 ` Victor Balakine
2012-03-07 14:59 ` Nikolay Kichukov
0 siblings, 1 reply; 5+ messages in thread
From: Victor Balakine @ 2012-03-06 19:10 UTC (permalink / raw)
To: linux-raid
# cat /proc/1506/stack
[<ffffffff8003a1e5>] __cond_resched+0x25/0x40
[<ffffffffa0102ebf>] raid5d+0x26f/0x3d0 [raid456]
[<ffffffff803c7a36>] md_thread+0x106/0x140
[<ffffffff8006444e>] kthread+0x7e/0x90
[<ffffffff80510d24>] kernel_thread_helper+0x4/0x10
[<ffffffffffffffff>] 0xffffffffffffffff
And this is what I see on system console
[ 411.331287] md: bind<xvda2>
[ 411.353737] md: raid0 personality registered for level 0
[ 411.354362] bio: create slab <bio-1> at 1
[ 411.354377] md/raid0:md0: looking at xvda2
[ 411.354382] md/raid0:md0: comparing xvda2(8386560) with xvda2(8386560)
[ 411.354389] md/raid0:md0: END
[ 411.354393] md/raid0:md0: ==> UNIQUE
[ 411.354397] md/raid0:md0: 1 zones
[ 411.354400] md/raid0:md0: FINAL 1 zones
[ 411.354409] md/raid0:md0: done.
[ 411.354414] md/raid0:md0: md_size is 8386560 sectors.
[ 411.354418] ******* md0 configuration *********
[ 411.354424] zone0=[xvda2/]
[ 411.354430] zone offset=0kb device offset=0kb size=4193280kb
[ 411.354434] **********************************
[ 411.354436]
[ 411.354451] md0: detected capacity change from 0 to 4293918720
[ 411.372921] md0: p1
[ 434.228901] md/raid:md0: device xvda2 operational as raid disk 0
[ 434.229104] md/raid:md0: allocated 2176kB
[ 434.229159] md/raid:md0: raid level 4 active with 1 out of 2 devices,
algorithm 5
[ 434.306479] md: bind<xvda3>
[ 434.405827] md: reshape of RAID array md0
[ 434.405839] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
[ 434.405844] md: using maximum available idle IO bandwidth (but not
more than 200000 KB/sec) for reshape.
[ 434.405851] md: using 128k window, over a total of 4193280k.
And a little while later:
[ 960.220050] INFO: task md0_reshape:1508 blocked for more than 480
seconds.
[ 960.220068] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[ 960.220077] md0_reshape D 0000000000000000 0 1508 2
0x00000000
[ 960.220087] ffff88001e69fbc0 0000000000000246 ffff88001e10c1c0
ffffffffa0100c45
[ 960.220097] ffff88001e69ffd8 ffff88001e10c1c0 ffff88001e69ffd8
ffff88001e10c1c0
[ 960.220106] ffff88001e038440 ffff88001e10c1c0 0000000000000001
0000000000000000
[ 960.220119] Call Trace:
[ 960.220141] [<ffffffffa0101f6d>] reshape_request+0x57d/0x930 [raid456]
[ 960.220165] [<ffffffffa010266e>] sync_request+0x23e/0x2c0 [raid456]
[ 960.220183] [<ffffffff803cae48>] md_do_sync+0x748/0xd10
[ 960.220194] [<ffffffff803c7a36>] md_thread+0x106/0x140
[ 960.220204] [<ffffffff8006444e>] kthread+0x7e/0x90
[ 960.220216] [<ffffffff80510d24>] kernel_thread_helper+0x4/0x10
Victor
On 2012-03-05 17:21, NeilBrown wrote:
> On Mon, 05 Mar 2012 15:35:15 -0800 Victor Balakine<victor.balakine@ubc.ca>
> wrote:
>
>> Am I the only one having problem adding disks to RAID0? Has anybody
>> tried that on 3.* kernel?
>
> Strange. It works for me.
>
> We need to find out what the md0_raid0 process is doing.
> Can you
> cat /proc/PROCESSID/stack
>
> and see what that shows?
>
> NeilBrown
>
>
>>
>> Victor
>>
>> On 2012-02-28 15:34, Victor Balakine wrote:
>>> I am trying to add another disk to RAID0 and this functionality appears
>>> to be broken.
>>> First I create a RAID0 array:
>>> #mdadm --create /dev/md0 --level=0 --raid-devices=1 --force /dev/xvda2
>>> mdadm: Defaulting to version 1.2 metadata
>>> mdadm: array /dev/md0 started.
>>>
>>> So far everything works fine. Then I add another disk to it:
>>> #mdadm --grow /dev/md0 --raid-devices=2 --add /dev/xvda3
>>> --backup-file=/backup-md0
>>> mdadm: level of /dev/md0 changed to raid4
>>> mdadm: added /dev/xvda3
>>> mdadm: Need to backup 1024K of critical section..
>>>
>>> This is what I see in /var/log/messages
>>> Feb 28 15:03:30 storage kernel: [ 1420.174022] md: bind<xvda2>
>>> Feb 28 15:03:30 storage kernel: [ 1420.209167] md: raid0 personality
>>> registered for level 0
>>> Feb 28 15:03:30 storage kernel: [ 1420.209818] bio: create slab<bio-1>
>>> at 1
>>> Feb 28 15:03:30 storage kernel: [ 1420.209832] md/raid0:md0: looking at
>>> xvda2
>>> Feb 28 15:03:30 storage kernel: [ 1420.209837] md/raid0:md0: comparing
>>> xvda2(8386560) with xvda2(8386560)
>>> Feb 28 15:03:30 storage kernel: [ 1420.209844] md/raid0:md0: END
>>> Feb 28 15:03:30 storage kernel: [ 1420.209851] md/raid0:md0: ==> UNIQUE
>>> Feb 28 15:03:30 storage kernel: [ 1420.209856] md/raid0:md0: 1 zones
>>> Feb 28 15:03:30 storage kernel: [ 1420.209859] md/raid0:md0: FINAL 1 zones
>>> Feb 28 15:03:30 storage kernel: [ 1420.209866] md/raid0:md0: done.
>>> Feb 28 15:03:30 storage kernel: [ 1420.209870] md/raid0:md0: md_size is
>>> 8386560 sectors.
>>> Feb 28 15:03:30 storage kernel: [ 1420.209875] ******* md0 configuration
>>> *********
>>> Feb 28 15:03:30 storage kernel: [ 1420.209879] zone0=[xvda2/]
>>> Feb 28 15:03:30 storage kernel: [ 1420.209885] zone offset=0kb device
>>> offset=0kb size=4193280kb
>>> Feb 28 15:03:30 storage kernel: [ 1420.209902]
>>> **********************************
>>> Feb 28 15:03:30 storage kernel: [ 1420.209903]
>>> Feb 28 15:03:30 storage kernel: [ 1420.209919] md0: detected capacity
>>> change from 0 to 4293918720
>>> Feb 28 15:03:30 storage kernel: [ 1420.223968] md0: p1
>>> ...
>>> Feb 28 15:04:01 storage kernel: [ 1450.783016] async_tx: api initialized
>>> (async)
>>> Feb 28 15:04:01 storage kernel: [ 1450.796912] xor: automatically using
>>> best checksumming function: generic_sse
>>> Feb 28 15:04:01 storage kernel: [ 1450.816012] generic_sse: 9509.000 MB/sec
>>> Feb 28 15:04:01 storage kernel: [ 1450.816021] xor: using function:
>>> generic_sse (9509.000 MB/sec)
>>> Feb 28 15:04:01 storage kernel: [ 1450.912021] raid6: int64x1 1888 MB/s
>>> Feb 28 15:04:01 storage kernel: [ 1450.980013] raid6: int64x2 2707 MB/s
>>> Feb 28 15:04:01 storage kernel: [ 1451.048025] raid6: int64x4 2073 MB/s
>>> Feb 28 15:04:01 storage kernel: [ 1451.116039] raid6: int64x8 2010 MB/s
>>> Feb 28 15:04:01 storage kernel: [ 1451.184017] raid6: sse2x1 4764 MB/s
>>> Feb 28 15:04:01 storage kernel: [ 1451.252018] raid6: sse2x2 5170 MB/s
>>> Feb 28 15:04:01 storage kernel: [ 1451.320016] raid6: sse2x4 7548 MB/s
>>> Feb 28 15:04:01 storage kernel: [ 1451.320025] raid6: using algorithm
>>> sse2x4 (7548 MB/s)
>>> Feb 28 15:04:01 storage kernel: [ 1451.330136] md: raid6 personality
>>> registered for level 6
>>> Feb 28 15:04:01 storage kernel: [ 1451.330145] md: raid5 personality
>>> registered for level 5
>>> Feb 28 15:04:01 storage kernel: [ 1451.330149] md: raid4 personality
>>> registered for level 4
>>> Feb 28 15:04:01 storage kernel: [ 1451.330662] md/raid:md0: device xvda2
>>> operational as raid disk 0
>>> Feb 28 15:04:01 storage kernel: [ 1451.330820] md/raid:md0: allocated
>>> 2176kB
>>> Feb 28 15:04:01 storage kernel: [ 1451.330869] md/raid:md0: raid level 4
>>> active with 1 out of 2 devices, algorithm 5
>>> Feb 28 15:04:01 storage kernel: [ 1451.330874] RAID conf printout:
>>> Feb 28 15:04:01 storage kernel: [ 1451.330876] --- level:4 rd:2 wd:1
>>> Feb 28 15:04:01 storage kernel: [ 1451.330878] disk 0, o:1, dev:xvda2
>>> Feb 28 15:04:01 storage kernel: [ 1451.417995] md: bind<xvda3>
>>> Feb 28 15:04:01 storage kernel: [ 1451.616399] RAID conf printout:
>>> Feb 28 15:04:01 storage kernel: [ 1451.616404] --- level:4 rd:3 wd:2
>>> Feb 28 15:04:01 storage kernel: [ 1451.616408] disk 0, o:1, dev:xvda2
>>> Feb 28 15:04:01 storage kernel: [ 1451.616411] disk 1, o:1, dev:xvda3
>>> Feb 28 15:04:01 storage kernel: [ 1451.619054] md: reshape of RAID array
>>> md0
>>> Feb 28 15:04:01 storage kernel: [ 1451.619066] md: minimum _guaranteed_
>>> speed: 1000 KB/sec/disk.
>>> Feb 28 15:04:01 storage kernel: [ 1451.619069] md: using maximum
>>> available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
>>> Feb 28 15:04:01 storage kernel: [ 1451.619075] md: using 128k window,
>>> over a total of 4193280k.
>>> Feb 28 15:05:02 storage udevd[280]: timeout '/sbin/blkid -o udev -p
>>> /dev/md0'
>>> Feb 28 15:05:03 storage udevd[280]: timeout: killing '/sbin/blkid -o
>>> udev -p /dev/md0' [1829]
>>> Feb 28 15:05:04 storage udevd[280]: timeout: killing '/sbin/blkid -o
>>> udev -p /dev/md0' [1829]
>>> Feb 28 15:05:05 storage udevd[280]: timeout: killing '/sbin/blkid -o
>>> udev -p /dev/md0' [1829]
>>>
>>> And then it just goes on forever. md0_raid0 process stays at 100% CPU load.
>>> # ps -ef | grep md0
>>> root 7268 2 99 09:34 ? 05:53:00 [md0_raid0]
>>> root 7270 2 0 09:34 ? 00:00:00 [md0_reshape]
>>> root 7271 1 0 09:34 pts/0 00:00:00 mdadm --grow /dev/md0
>>> --raid-devices=2 --add /dev/sdc1 --backup-file=/backup-md0
>>>
>>> # cat /proc/mdstat
>>> Personalities : [raid0] [raid6] [raid5] [raid4]
>>> md0 : active raid4 xvda3[2] xvda2[0]
>>> 4193280 blocks super 1.2 level 4, 512k chunk, algorithm 5 [3/1] [U__]
>>> resync=DELAYED
>>>
>>> unused devices:<none>
>>>
>>> # mdadm --version
>>> mdadm - v3.2.2 - 17th June 2011
>>> # uname -a
>>> Linux storage 3.1.9-1.4-xen #1 SMP Fri Jan 27 08:55:10 UTC 2012
>>> (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux
>>>
>>> It's OpenSUSE 12.1 with all the latest updates running in XEN that I
>>> created to reproduce the problem. The actual server is running the same
>>> version of OpenSUSE (Linux san1 3.1.9-1.4-desktop #1 SMP PREEMPT Fri Jan
>>> 27 08:55:10 UTC 2012 (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux) on a
>>> hardware server. If you need any more information I can easily get it
>>> since it's a VM and the problem is easily reproducible.
>>>
>>> Victor
>>> --
>>> 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
>
--
Victor Balakine
Network Systems Administrator | Continuing Studies | Information Technology
The University of British Columbia | Vancouver Campus
Phone 604 822 1496
victor.balakine@ubc.ca
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Adding a disk to RAID0
2012-03-06 19:10 ` Victor Balakine
@ 2012-03-07 14:59 ` Nikolay Kichukov
0 siblings, 0 replies; 5+ messages in thread
From: Nikolay Kichukov @ 2012-03-07 14:59 UTC (permalink / raw)
To: Victor Balakine; +Cc: linux-raid
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Hi Victor,
The exact same behavior on my machine:
http://marc.info/?l=linux-raid&m=132757440920831&w=2
Cheers,
- -Nik
On 03/06/2012 09:10 PM, Victor Balakine wrote:
> # cat /proc/1506/stack
> [<ffffffff8003a1e5>] __cond_resched+0x25/0x40
> [<ffffffffa0102ebf>] raid5d+0x26f/0x3d0 [raid456]
> [<ffffffff803c7a36>] md_thread+0x106/0x140
> [<ffffffff8006444e>] kthread+0x7e/0x90
> [<ffffffff80510d24>] kernel_thread_helper+0x4/0x10
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> And this is what I see on system console
> [ 411.331287] md: bind<xvda2>
> [ 411.353737] md: raid0 personality registered for level 0
> [ 411.354362] bio: create slab <bio-1> at 1
> [ 411.354377] md/raid0:md0: looking at xvda2
> [ 411.354382] md/raid0:md0: comparing xvda2(8386560) with xvda2(8386560)
> [ 411.354389] md/raid0:md0: END
> [ 411.354393] md/raid0:md0: ==> UNIQUE
> [ 411.354397] md/raid0:md0: 1 zones
> [ 411.354400] md/raid0:md0: FINAL 1 zones
> [ 411.354409] md/raid0:md0: done.
> [ 411.354414] md/raid0:md0: md_size is 8386560 sectors.
> [ 411.354418] ******* md0 configuration *********
> [ 411.354424] zone0=[xvda2/]
> [ 411.354430] zone offset=0kb device offset=0kb size=4193280kb
> [ 411.354434] **********************************
> [ 411.354436]
> [ 411.354451] md0: detected capacity change from 0 to 4293918720
> [ 411.372921] md0: p1
> [ 434.228901] md/raid:md0: device xvda2 operational as raid disk 0
> [ 434.229104] md/raid:md0: allocated 2176kB
> [ 434.229159] md/raid:md0: raid level 4 active with 1 out of 2 devices, algorithm 5
> [ 434.306479] md: bind<xvda3>
> [ 434.405827] md: reshape of RAID array md0
> [ 434.405839] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
> [ 434.405844] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
> [ 434.405851] md: using 128k window, over a total of 4193280k.
>
> And a little while later:
> [ 960.220050] INFO: task md0_reshape:1508 blocked for more than 480 seconds.
> [ 960.220068] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 960.220077] md0_reshape D 0000000000000000 0 1508 2 0x00000000
> [ 960.220087] ffff88001e69fbc0 0000000000000246 ffff88001e10c1c0 ffffffffa0100c45
> [ 960.220097] ffff88001e69ffd8 ffff88001e10c1c0 ffff88001e69ffd8 ffff88001e10c1c0
> [ 960.220106] ffff88001e038440 ffff88001e10c1c0 0000000000000001 0000000000000000
> [ 960.220119] Call Trace:
> [ 960.220141] [<ffffffffa0101f6d>] reshape_request+0x57d/0x930 [raid456]
> [ 960.220165] [<ffffffffa010266e>] sync_request+0x23e/0x2c0 [raid456]
> [ 960.220183] [<ffffffff803cae48>] md_do_sync+0x748/0xd10
> [ 960.220194] [<ffffffff803c7a36>] md_thread+0x106/0x140
> [ 960.220204] [<ffffffff8006444e>] kthread+0x7e/0x90
> [ 960.220216] [<ffffffff80510d24>] kernel_thread_helper+0x4/0x10
>
> Victor
>
> On 2012-03-05 17:21, NeilBrown wrote:
>> On Mon, 05 Mar 2012 15:35:15 -0800 Victor Balakine<victor.balakine@ubc.ca>
>> wrote:
>>
>>> Am I the only one having problem adding disks to RAID0? Has anybody
>>> tried that on 3.* kernel?
>>
>> Strange. It works for me.
>>
>> We need to find out what the md0_raid0 process is doing.
>> Can you
>> cat /proc/PROCESSID/stack
>>
>> and see what that shows?
>>
>> NeilBrown
>>
>>
>>>
>>> Victor
>>>
>>> On 2012-02-28 15:34, Victor Balakine wrote:
>>>> I am trying to add another disk to RAID0 and this functionality appears
>>>> to be broken.
>>>> First I create a RAID0 array:
>>>> #mdadm --create /dev/md0 --level=0 --raid-devices=1 --force /dev/xvda2
>>>> mdadm: Defaulting to version 1.2 metadata
>>>> mdadm: array /dev/md0 started.
>>>>
>>>> So far everything works fine. Then I add another disk to it:
>>>> #mdadm --grow /dev/md0 --raid-devices=2 --add /dev/xvda3
>>>> --backup-file=/backup-md0
>>>> mdadm: level of /dev/md0 changed to raid4
>>>> mdadm: added /dev/xvda3
>>>> mdadm: Need to backup 1024K of critical section..
>>>>
>>>> This is what I see in /var/log/messages
>>>> Feb 28 15:03:30 storage kernel: [ 1420.174022] md: bind<xvda2>
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209167] md: raid0 personality
>>>> registered for level 0
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209818] bio: create slab<bio-1>
>>>> at 1
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209832] md/raid0:md0: looking at
>>>> xvda2
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209837] md/raid0:md0: comparing
>>>> xvda2(8386560) with xvda2(8386560)
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209844] md/raid0:md0: END
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209851] md/raid0:md0: ==> UNIQUE
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209856] md/raid0:md0: 1 zones
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209859] md/raid0:md0: FINAL 1 zones
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209866] md/raid0:md0: done.
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209870] md/raid0:md0: md_size is
>>>> 8386560 sectors.
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209875] ******* md0 configuration
>>>> *********
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209879] zone0=[xvda2/]
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209885] zone offset=0kb device
>>>> offset=0kb size=4193280kb
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209902]
>>>> **********************************
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209903]
>>>> Feb 28 15:03:30 storage kernel: [ 1420.209919] md0: detected capacity
>>>> change from 0 to 4293918720
>>>> Feb 28 15:03:30 storage kernel: [ 1420.223968] md0: p1
>>>> ...
>>>> Feb 28 15:04:01 storage kernel: [ 1450.783016] async_tx: api initialized
>>>> (async)
>>>> Feb 28 15:04:01 storage kernel: [ 1450.796912] xor: automatically using
>>>> best checksumming function: generic_sse
>>>> Feb 28 15:04:01 storage kernel: [ 1450.816012] generic_sse: 9509.000 MB/sec
>>>> Feb 28 15:04:01 storage kernel: [ 1450.816021] xor: using function:
>>>> generic_sse (9509.000 MB/sec)
>>>> Feb 28 15:04:01 storage kernel: [ 1450.912021] raid6: int64x1 1888 MB/s
>>>> Feb 28 15:04:01 storage kernel: [ 1450.980013] raid6: int64x2 2707 MB/s
>>>> Feb 28 15:04:01 storage kernel: [ 1451.048025] raid6: int64x4 2073 MB/s
>>>> Feb 28 15:04:01 storage kernel: [ 1451.116039] raid6: int64x8 2010 MB/s
>>>> Feb 28 15:04:01 storage kernel: [ 1451.184017] raid6: sse2x1 4764 MB/s
>>>> Feb 28 15:04:01 storage kernel: [ 1451.252018] raid6: sse2x2 5170 MB/s
>>>> Feb 28 15:04:01 storage kernel: [ 1451.320016] raid6: sse2x4 7548 MB/s
>>>> Feb 28 15:04:01 storage kernel: [ 1451.320025] raid6: using algorithm
>>>> sse2x4 (7548 MB/s)
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330136] md: raid6 personality
>>>> registered for level 6
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330145] md: raid5 personality
>>>> registered for level 5
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330149] md: raid4 personality
>>>> registered for level 4
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330662] md/raid:md0: device xvda2
>>>> operational as raid disk 0
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330820] md/raid:md0: allocated
>>>> 2176kB
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330869] md/raid:md0: raid level 4
>>>> active with 1 out of 2 devices, algorithm 5
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330874] RAID conf printout:
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330876] --- level:4 rd:2 wd:1
>>>> Feb 28 15:04:01 storage kernel: [ 1451.330878] disk 0, o:1, dev:xvda2
>>>> Feb 28 15:04:01 storage kernel: [ 1451.417995] md: bind<xvda3>
>>>> Feb 28 15:04:01 storage kernel: [ 1451.616399] RAID conf printout:
>>>> Feb 28 15:04:01 storage kernel: [ 1451.616404] --- level:4 rd:3 wd:2
>>>> Feb 28 15:04:01 storage kernel: [ 1451.616408] disk 0, o:1, dev:xvda2
>>>> Feb 28 15:04:01 storage kernel: [ 1451.616411] disk 1, o:1, dev:xvda3
>>>> Feb 28 15:04:01 storage kernel: [ 1451.619054] md: reshape of RAID array
>>>> md0
>>>> Feb 28 15:04:01 storage kernel: [ 1451.619066] md: minimum _guaranteed_
>>>> speed: 1000 KB/sec/disk.
>>>> Feb 28 15:04:01 storage kernel: [ 1451.619069] md: using maximum
>>>> available idle IO bandwidth (but not more than 200000 KB/sec) for reshape.
>>>> Feb 28 15:04:01 storage kernel: [ 1451.619075] md: using 128k window,
>>>> over a total of 4193280k.
>>>> Feb 28 15:05:02 storage udevd[280]: timeout '/sbin/blkid -o udev -p
>>>> /dev/md0'
>>>> Feb 28 15:05:03 storage udevd[280]: timeout: killing '/sbin/blkid -o
>>>> udev -p /dev/md0' [1829]
>>>> Feb 28 15:05:04 storage udevd[280]: timeout: killing '/sbin/blkid -o
>>>> udev -p /dev/md0' [1829]
>>>> Feb 28 15:05:05 storage udevd[280]: timeout: killing '/sbin/blkid -o
>>>> udev -p /dev/md0' [1829]
>>>>
>>>> And then it just goes on forever. md0_raid0 process stays at 100% CPU load.
>>>> # ps -ef | grep md0
>>>> root 7268 2 99 09:34 ? 05:53:00 [md0_raid0]
>>>> root 7270 2 0 09:34 ? 00:00:00 [md0_reshape]
>>>> root 7271 1 0 09:34 pts/0 00:00:00 mdadm --grow /dev/md0
>>>> --raid-devices=2 --add /dev/sdc1 --backup-file=/backup-md0
>>>>
>>>> # cat /proc/mdstat
>>>> Personalities : [raid0] [raid6] [raid5] [raid4]
>>>> md0 : active raid4 xvda3[2] xvda2[0]
>>>> 4193280 blocks super 1.2 level 4, 512k chunk, algorithm 5 [3/1] [U__]
>>>> resync=DELAYED
>>>>
>>>> unused devices:<none>
>>>>
>>>> # mdadm --version
>>>> mdadm - v3.2.2 - 17th June 2011
>>>> # uname -a
>>>> Linux storage 3.1.9-1.4-xen #1 SMP Fri Jan 27 08:55:10 UTC 2012
>>>> (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux
>>>>
>>>> It's OpenSUSE 12.1 with all the latest updates running in XEN that I
>>>> created to reproduce the problem. The actual server is running the same
>>>> version of OpenSUSE (Linux san1 3.1.9-1.4-desktop #1 SMP PREEMPT Fri Jan
>>>> 27 08:55:10 UTC 2012 (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux) on a
>>>> hardware server. If you need any more information I can easily get it
>>>> since it's a VM and the problem is easily reproducible.
>>>>
>>>> Victor
>>>> --
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>>
>
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2012-03-07 14:59 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-02-28 23:34 Adding a disk to RAID0 Victor Balakine
2012-03-05 23:35 ` Victor Balakine
2012-03-06 1:21 ` NeilBrown
2012-03-06 19:10 ` Victor Balakine
2012-03-07 14:59 ` Nikolay Kichukov
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