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SubjectRe: [patch v3] swap: virtual swap readahead
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On Wed, 2009-06-10 at 16:56 +0800, Wu Fengguang wrote:
>
> Yes it worked! But then I run into page allocation failures:
>
> [ 340.639803] Xorg: page allocation failure. order:4, mode:0x40d0
> [ 340.645744] Pid: 3258, comm: Xorg Not tainted 2.6.30-rc8-mm1 #303
> [ 340.651839] Call Trace:
> [ 340.654289] [<ffffffff810c8204>] __alloc_pages_nodemask+0x344/0x6c0
> [ 340.660645] [<ffffffff810f7489>] __slab_alloc_page+0xb9/0x3b0
> [ 340.666472] [<ffffffff810f8608>] __kmalloc+0x198/0x250
> [ 340.671786] [<ffffffffa014bf9f>] ? i915_gem_execbuffer+0x17f/0x11e0 [i915]
> [ 340.678746] [<ffffffffa014bf9f>] i915_gem_execbuffer+0x17f/0x11e0 [i915]

Jesse Barnes had a patch to add a vmalloc fallback to those largish kms
allocs.

But order-4 allocs failing isn't really strange, but it might indicate
this patch fragments stuff sooner, although I've seen these particular
failues before.


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