Re: [patch] CFS scheduler, -v12

Siddha, Suresh B wrote:

On Tue, May 29, 2007 at 07:18:18PM -0700, Peter Williams wrote:

Siddha, Suresh B wrote:

I can try 32-bit kernel to check.

Don't bother.  I just checked 2.6.22-rc3 and the problem is not present
which means something between rc2 and rc3 has fixed the problem.  I hate
it when problems (appear to) fix themselves as it usually means they're
just hiding.

I didn't see any patches between rc2 and rc3 that were likely to have
fixed this (but doesn't mean there wasn't one).  I'm wondering whether I
should do a git bisect to see if I can find where it got fixed?

Could you see if you can reproduce it on 2.6.22-rc2?

No. Just tried 2.6.22-rc2 64-bit version at runlevel 3 on my remote
system at office. 15 attempts didn't show the issue.

Sure that nothing changed in your test setup?

More experiments tomorrow morning..

I've finished bisecting and the patch at which things appear to improve is cd5477911fc9f5cc64678e2b95cdd606c59a11b5 which is in the middle of a bunch of patches reorganizing the link phase of the build. Patch description is:

kbuild: add "Section mismatch" warning whitelist for powerpc
author	Li Yang <[email protected]>
	Mon, 14 May 2007 10:04:28 +0000 (18:04 +0800)
committer	Sam Ravnborg <[email protected]>
	Sat, 19 May 2007 07:11:57 +0000 (09:11 +0200)
commit	cd5477911fc9f5cc64678e2b95cdd606c59a11b5
tree	d893f07b0040d36dfc60040dc695384e9afcf103	tree | snapshot
parent	f892b7d480eec809a5dfbd6e65742b3f3155e50e	commit | diff
kbuild: add "Section mismatch" warning whitelist for powerpc

This patch fixes the following class of "Section mismatch" warnings when
building powerpc platforms.

WARNING: arch/powerpc/kernel/built-in.o - Section mismatch: reference to .init.data:.got2 from prom_entry (offset 0x0) WARNING: arch/powerpc/platforms/built-in.o - Section mismatch: reference to .init.text:mpc8313_rdb_probe from .machine.desc after 'mach_mpc8313_rdb' (at offset 0x4)

....

Signed-off-by: Li Yang <[email protected]>
Signed-off-by: Sam Ravnborg <[email protected]>

scripts/mod/modpost.c

Peter
--
Peter Williams                                   [email protected]

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 -- Ambrose Bierce
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---

• References:
  • Re: [patch] CFS scheduler, -v12
    • From: Peter Williams <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: Peter Williams <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: Peter Williams <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: Peter Williams <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: "Siddha, Suresh B" <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: Peter Williams <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: "Siddha, Suresh B" <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: Peter Williams <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: "Siddha, Suresh B" <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: Peter Williams <[email protected]>
  • Re: [patch] CFS scheduler, -v12
    • From: "Siddha, Suresh B" <[email protected]>

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