Re: %u-order allocation failed

From: Alex Bligh - linux-kernel (
Date: Mon Oct 08 2001 - 10:01:05 EST

--On Sunday, October 07, 2001 12:30 PM -0600 "Eric W. Biederman"
<> wrote:

>> Note also that something (not sure what) has made fragmentation
>> increasingly prevalent over the years since the buddy allocator
>> was originally put in.
> Actually it seems to be situations like the stack now being two pages

Instrumentation posted here before appears to corellate fragmentation
being /caused/ with I/O activity (single bonnie process and thus a
single 8k stack frame). My own guess is that it is due to
a different persistence of various caches.

I haven't seen anyone before blaming stack frame allocation
as a /cause/ of fragmenation - I've heard people say they
notice fragmentation more as stack frame allocs start to
fail - but that's a symptom.

Alex Bligh
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