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

On Sun, 9 Dec 2007 10:20:19 +0200
"Pekka Enberg" <[email protected]> wrote:
\
> Now, while SLAB code is "pleasant and straightforward code" (thanks,
> btw) for UMA, it's really hairy for NUMA plus the "alien caches" eat
> tons of memory 

.. and they make slab slower on numa systems for database workloads
(I'm sure they do fine for SGI's customers HPC load though))

>(which is why Christoph wrote SLUB in the first place,
> the current code in SLAB is mostly unfixable due to its *queuing*
> nature).

To be honest, a SLAB without the alien stuff might be one of the best
performers today .... ;)
(on database loads.. where slub is quite a disaster as everyone knows)

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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]>
- 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: 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: 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: "Pekka Enberg" <[email protected]>

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