Tosa kernel bloat

Tosa kernel bloat

[Junqian Gordon Xu]

Tosa kernel is bloated with the recent patch and change to defconfig-tosa

|`/home/gordon/oe/build/tmp/work/tosa-angstrom-linux-gnueabi/linux-rp-2.6.23-r14/linux-2.6.23'
| Size is 1296464
| FATAL: This kernel is too big for your PXA Zaurus and will destroy 
data if you flash it. Please reduce the size of the kernel by making 
more of it modular.

Anybody else experience this? I guess kernel size below 1280000 is ok? 
I'm not sure where I should look to trim it down?

Regards
Gordon

Re: [Angstrom-devel] Tosa kernel bloat

[Koen Kooi]

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Hash: SHA1

Junqian Gordon Xu schreef:
> Tosa kernel is bloated with the recent patch and change to defconfig-tosa
> 
> |`/home/gordon/oe/build/tmp/work/tosa-angstrom-linux-gnueabi/linux-rp-2.6.23-r14/linux-2.6.23'
> | Size is 1296464
> | FATAL: This kernel is too big for your PXA Zaurus and will destroy 
> data if you flash it. Please reduce the size of the kernel by making 
> more of it modular.
> 
> Anybody else experience this? I guess kernel size below 1280000 is ok? 
> I'm not sure where I should look to trim it down?

Is that also the case in the angstrom stable branch?

regards,

Koen

- --
koen@dominion.kabel.utwente.nl will go go away in december 2007, please
use k.kooi@student.utwente.nl instead.

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Re: [Angstrom-devel] Tosa kernel bloat

[cyril Romain]

Koen Kooi wrote:
> Junqian Gordon Xu schreef:
> > Tosa kernel is bloated with the recent patch and change to
> defconfig-tosa
>
> Is that also the case in the angstrom stable branch?
Yes.
This is the case for linux-rp-2.6.23-r12 (angstrom stable branch) and
linux-rp-2.6.23-r14: (angstrom dev branch)
The tosa kernel compiled fine with linux-rp-2.6.23-r10 (metadata from
december, 8th)

To cut the kernel size down, some of the following built-in features may
be set as modules instead:

-------8<---------8<---------
CONFIG_USB_ETH_RNDIS=y
CONFIG_MSDOS_PARTITION=y
CONFIG_USB_GADGET_SELECTED=y
CONFIG_USB_GADGET_PXA2XX=y
CONFIG_USB_EZUSB=y
CONFIG_USB_HIDINPUT=y
CONFIG_VIDEO_V4L1=y
CONFIG_VIDEO_V4L1_COMPAT=y
CONFIG_VIDEO_V4L2=y
CONFIG_NET_RADIO=y
CONFIG_SCSI_MULTI_LUN=y
-------8<---------8<---------

Regards,

  -- cyril

Re: [Angstrom-devel] Tosa kernel bloat

[Marcin Juszkiewicz]

Dnia piątek, 28 grudnia 2007, cyril Romain napisał:

> To cut the kernel size down, some of the following built-in features
> may be set as modules instead:

> -------8<---------8<---------
> CONFIG_USB_ETH_RNDIS=y

thats option not module

> CONFIG_MSDOS_PARTITION=y

thats option not module

> CONFIG_USB_GADGET_SELECTED=y

thats auto option

> CONFIG_USB_GADGET_PXA2XX=y

thats option not module

CONFIG_USB_GADGET would be good choice instead

> CONFIG_USB_EZUSB=y

> CONFIG_USB_HIDINPUT=y

thats option not module

> CONFIG_VIDEO_V4L1=y

thats option not module

> CONFIG_VIDEO_V4L1_COMPAT=y

thats option not module

> CONFIG_VIDEO_V4L2=y

thats option not module

> CONFIG_NET_RADIO=y

thats option not module

> CONFIG_SCSI_MULTI_LUN=y

thats option not module

-- 
JID: hrw-jabber.org
OpenEmbedded developer/consultant

   Gdyby człowiek musiał zezwalać innym na to, co toleruje u siebie,
   życie byłoby nie do wytrzymania.             [Georges Courteline]

Re: [Angstrom-devel] Tosa kernel bloat

[Junqian Gordon Xu]

On 12/28/2007 07:04 AM, cyril Romain wrote:
> Koen Kooi wrote:
>> Junqian Gordon Xu schreef:
>>> Tosa kernel is bloated with the recent patch and change to
>> defconfig-tosa
>>
>> Is that also the case in the angstrom stable branch?
> Yes.
> This is the case for linux-rp-2.6.23-r12 (angstrom stable branch) and
> linux-rp-2.6.23-r14: (angstrom dev branch)
> The tosa kernel compiled fine with linux-rp-2.6.23-r10 (metadata from
> december, 8th)

Since there is little to trim down for tosa kernel (WM9712 and tosa_ts 
are possible targets, but need to patch kernel to make those 
modularizable). The only option for now is to disable KEXEC and ATAGS. 
Please review the patch for both stable and dev.

Regards
Gordon

# old_revision [93692aaac63b82b355275bee987480a1232079a1]
#
# patch "packages/linux/linux-rp-2.6.23/defconfig-tosa"
#  from [1980d93e930a1fd5959d13384211a7f445751136]
#    to [f7677a83e981b7570f63b19ba6fde79500d32e64]
#
============================================================
--- packages/linux/linux-rp-2.6.23/defconfig-tosa 
1980d93e930a1fd5959d13384211a7f445751136
+++ packages/linux/linux-rp-2.6.23/defconfig-tosa 
f7677a83e981b7570f63b19ba6fde79500d32e64
@@ -142,8 +142,8 @@ CONFIG_XSCALE_PMU=y
  #
  CONFIG_ARM_THUMB=y
  CONFIG_XSCALE_PMU=y
-CONFIG_KEXEC=y
-CONFIG_ATAGS_PROC=y
+# CONFIG_KEXEC is not set
+# CONFIG_ATAGS_PROC is not set
  CONFIG_SHARP_PARAM=y
  CONFIG_SHARPSL_PM=y
  CONFIG_SHARP_SCOOP=y

Re: Tosa kernel bloat

[Marcin Juszkiewicz]

Dnia piątek, 28 grudnia 2007, Junqian Gordon Xu napisał:
> Tosa kernel is bloated with the recent patch and change to
> defconfig-tosa
>
> |`/home/gordon/oe/build/tmp/work/tosa-angstrom-linux-gnueabi/linux-rp-2
> |.6.23-r14/linux-2.6.23' Size is 1296464
> | FATAL: This kernel is too big for your PXA Zaurus and will destroy
>
> data if you flash it. Please reduce the size of the kernel by making
> more of it modular.

Same on Poodle:

| make[1]: Leaving directory 
`/home/hrw/devel/build/angstrom/tmp/work/poodle-angstrom-linux-gnueabi/linux-rp-2.6.23-r14/linux-2.6.23'
| Size is 1306384
| FATAL: This kernel is too big for your PXA Zaurus and will destroy data 
if you flash it. Please reduce the size of the kernel by making more of 
it modular.



-- 
JID: hrw-jabber.org
OpenEmbedded developer/consultant

           Q:      What's a light-year?
           A:      One-third less calories than a regular year.

Re: Tosa kernel bloat

[Michael 'Mickey' Lauer]

>> Tosa kernel is bloated with the recent patch and change to
>> defconfig-tosa
>>
>> |`/home/gordon/oe/build/tmp/work/tosa-angstrom-linux-gnueabi/linux-rp-2
>> |.6.23-r14/linux-2.6.23' Size is 1296464
>> | FATAL: This kernel is too big for your PXA Zaurus and will destroy
>>
>> data if you flash it. Please reduce the size of the kernel by making
>> more of it modular.

> Same on Poodle:
> | make[1]: Leaving directory
> `/home/hrw/devel/build/angstrom/tmp/work/poodle-angstrom-linux-gnueabi/linux-rp-2.6.23-r14/linux-2.6.23'
> | Size is 1306384
> | FATAL: This kernel is too big for your PXA Zaurus and will destroy data
> if you flash it. Please reduce the size of the kernel by making more of
> it modular.

I vaguely remember that the host toolset has an influence on that. Do
you remember where the same kernel compiled ok for Richard but other
guys got the too-big error? Did we ever found the actual cause of
that?

:M:

Re: Tosa kernel bloat

[Richard Purdie]

On Mon, 2007-12-31 at 21:10 +0100, Michael 'Mickey' Lauer wrote:
> >> Tosa kernel is bloated with the recent patch and change to
> >> defconfig-tosa
> >>
> >> |`/home/gordon/oe/build/tmp/work/tosa-angstrom-linux-gnueabi/linux-rp-2
> >> |.6.23-r14/linux-2.6.23' Size is 1296464
> >> | FATAL: This kernel is too big for your PXA Zaurus and will destroy
> >>
> >> data if you flash it. Please reduce the size of the kernel by making
> >> more of it modular.
> 
> > Same on Poodle:
> > | make[1]: Leaving directory
> > `/home/hrw/devel/build/angstrom/tmp/work/poodle-angstrom-linux-gnueabi/linux-rp-2.6.23-r14/linux-2.6.23'
> > | Size is 1306384
> > | FATAL: This kernel is too big for your PXA Zaurus and will destroy data
> > if you flash it. Please reduce the size of the kernel by making more of
> > it modular.
> 
> I vaguely remember that the host toolset has an influence on that. Do
> you remember where the same kernel compiled ok for Richard but other
> guys got the too-big error? Did we ever found the actual cause of
> that?

I don't think we did ever get to the bottom of that. It was a 64 bit
machine compiling for 32 bit that showed the problem.

I have to admit I haven't tested the size of the kernels, I have that
check disabled locally as I've been pushing kexec and relying on that. I
pushed a load of defconfig fixes for poodle and its size should be under
control now, I'm not sure about tosa.

We do have a problem with kernel sizes in recent kernels, one we can't
really afford to ignore any longer. I made a post to LKML about some
size tests I made. My conclusion is that the networking stack is the
point of bloat in the zaurus kernels now and its the area we need to
address. It seems its impossible to compile half the networking stack as
a module and I'd like to see that changed. Any ideas or help here
welcome!

Cheers,

Richard

Re: Tosa kernel bloat

[Koen Kooi]

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Hash: SHA1

Richard Purdie schreef:

> We do have a problem with kernel sizes in recent kernels, one we can't
> really afford to ignore any longer.

- --- packages/linux/linux-rp.inc 0754d43aed9f1733a268bc5a327d596268b601e3
+++ packages/linux/linux-rp.inc 4b074ddc2ac5e4e9c7531684c078362c386641ba
@@ -95,7 +95,7 @@ do_configure() {

        if [ "${TARGET_OS}" = "linux-gnueabi" -o "${TARGET_OS}" =
"linux-uclibcgnueabi" ]; then
                echo "CONFIG_AEABI=y"                   >> ${S}/.config
- -               echo "CONFIG_OABI_COMPAT=y"             >> ${S}/.config
+               echo "# CONFIG_OABI_COMPAT is not set"             >>
${S}/.config
        else
                echo "# CONFIG_AEABI is not set"        >> ${S}/.config
                echo "# CONFIG_OABI_COMPAT is not set"  >> ${S}/.config

saves a few precious kB.

regards,

Koen

- --
koen@dominion.kabel.utwente.nl will go go away in december 2007, please
use k.kooi@student.utwente.nl instead.

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