From: Andrew Morton <akpm@osdl.org>
Date: Sun, 25 Jun 2006 12:47:49 +0000 (-0700)
Subject: [PATCH] schedule_on_each_cpu(): reduce kmalloc() size
X-Git-Tag: v2.6.18-rc1~989
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b61367732fc273977cc3fb85c272ce1a7bb1f533;p=pandora-kernel.git

[PATCH] schedule_on_each_cpu(): reduce kmalloc() size

schedule_on_each_cpu() presently does a large kmalloc - 96 kbytes on 1024 CPU
64-bit.

Rework it so that we do one 8192-byte allocation and then a pile of tiny ones,
via alloc_percpu().  This has a much higher chance of success (100% in the
current VM).

This also has the effect of reducing the memory requirements from NR_CPUS*n to
num_possible_cpus()*n.

Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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