* Re: SLUB 0:1 SLAB (OOM during massive parallel kernel builds)
[not found] ` <Pine.LNX.4.64.0710231305050.20095@schroedinger.engr.sgi.com>
@ 2007-10-23 20:41 ` Pekka Enberg
2007-10-24 16:56 ` Christoph Lameter
0 siblings, 1 reply; 2+ messages in thread
From: Pekka Enberg @ 2007-10-23 20:41 UTC (permalink / raw)
To: Christoph Lameter; +Cc: Alexey Dobriyan, linux-kernel, Linux MM
Hi Christoph,
(I fixed linux-mm cc to kvack.org.)
On 10/23/07, Christoph Lameter <clameter@sgi.com> wrote:
> The number of objects per page is reduced by enabling full debugging. That
> triggers a potential of more order 1 allocations but we are failing at
> order 0 allocs.
Yeah, but we're _not failing_ when debugging is enabled. Thus, it's
likely, that the _failing_ (non-debug) case has potential for more
order 0 allocs, no? I am just guessing here but maybe it's
slab_order() behaving differently from calculate_slab_order() so that
we see more order 0 pressure in SLUB than SLAB?
Pekka
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: SLUB 0:1 SLAB (OOM during massive parallel kernel builds)
2007-10-23 20:41 ` SLUB 0:1 SLAB (OOM during massive parallel kernel builds) Pekka Enberg
@ 2007-10-24 16:56 ` Christoph Lameter
0 siblings, 0 replies; 2+ messages in thread
From: Christoph Lameter @ 2007-10-24 16:56 UTC (permalink / raw)
To: Pekka Enberg; +Cc: Alexey Dobriyan, linux-kernel, Linux MM
On Tue, 23 Oct 2007, Pekka Enberg wrote:
> Yeah, but we're _not failing_ when debugging is enabled. Thus, it's
> likely, that the _failing_ (non-debug) case has potential for more
> order 0 allocs, no? I am just guessing here but maybe it's
> slab_order() behaving differently from calculate_slab_order() so that
> we see more order 0 pressure in SLUB than SLAB?
Seesm that order 0 pressure is better than order 1?
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2007-10-23 20:41 ` SLUB 0:1 SLAB (OOM during massive parallel kernel builds) Pekka Enberg
2007-10-24 16:56 ` Christoph Lameter
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