Messages in this thread | | | Date | Sat, 29 Sep 2007 02:01:41 -0700 | From | Andrew Morton <> | Subject | Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK |
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On Sat, 29 Sep 2007 10:53:41 +0200 Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> > On Sat, 2007-09-29 at 10:47 +0200, Peter Zijlstra wrote: > > > Ah, right, that was the detail... all this lumpy reclaim is useless for > > atomic allocations. And with SLUB using higher order pages, atomic !0 > > order allocations will be very very common. > > > > One I can remember was: > > > > add_to_page_cache() > > radix_tree_insert() > > radix_tree_node_alloc() > > kmem_cache_alloc() > > > > which is an atomic callsite. > > > > Which leaves us in a situation where we can load pages, because there is > > free memory, but can't manage to allocate memory to track them.. > > Ah, I found a boot log of one of these sessions, its also full of > order-2 OOMs.. :-/
oom-killings, or page allocation failures? The latter, one hopes. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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