Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2.6.24-rc4-git5: Reported regressions from 2.6.23]


On Sat, 8 Dec 2007, Andrew Morton wrote:
>
> > So which warning is it that triggers the bogus error?
> 
> It's a kmap_atomic() debugging patch which I wrote ages ago and whcih Ingo
> sucked into his tree.  I don't _think_ this warning is present in your tree
> at all.

Ok, that explains it.

> Knocking out __GFP_ZERO at the point where the slab allocator(s) call the
> page allocator seems like a good approach to me.
> 
> But I don't think we need to do anything for 2.6.24..

Good. Although we should perhaps look at that reported performance problem 
with SLUB. It looks like SLUB will do a memclear() for the area twice 
(first for the whole page, then for the thing it allocated) for the slow 
case. Maybe that exacerbates the problem.

			Linus
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Follow-Ups:
- Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2.6.24-rc4-git5: Reported regressions from 2.6.23]
  - From: Ingo Molnar <[email protected]>

References:
- 2.6.24-rc4-git5: Reported regressions from 2.6.23
  - From: "Rafael J. Wysocki" <[email protected]>
- Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2.6.24-rc4-git5: Reported regressions from 2.6.23]
  - From: Ingo Molnar <[email protected]>
- Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2.6.24-rc4-git5: Reported regressions from 2.6.23]
  - From: Matt Mackall <[email protected]>
- Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2.6.24-rc4-git5: Reported regressions from 2.6.23]
  - From: Linus Torvalds <[email protected]>
- Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2.6.24-rc4-git5: Reported regressions from 2.6.23]
  - From: Linus Torvalds <[email protected]>
- Re: tipc_init(), WARNING: at arch/x86/mm/highmem_32.c:52, [2.6.24-rc4-git5: Reported regressions from 2.6.23]
  - From: Andrew Morton <[email protected]>

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