Messages in this thread | | | Subject | Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK | From | Peter Zijlstra <> | Date | Sat, 29 Sep 2007 10:53:41 +0200 |
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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.. :-/
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