From: Tejun Heo <tj@kernel.org>
Date: Mon, 22 Jun 2009 02:56:24 +0000 (+0900)
Subject: x86: ensure percpu lpage doesn't consume too much vmalloc space
X-Git-Tag: v2.6.31-rc2~76^2~8^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0017c869ddcb73069905d09f9e98e68627466237;p=pandora-kernel.git

x86: ensure percpu lpage doesn't consume too much vmalloc space

On extreme configuration (e.g. 32bit 32-way NUMA machine), lpage
percpu first chunk allocator can consume too much of vmalloc space.
Make it fall back to 4k allocator if the consumption goes over 20%.

[ Impact: add sanity check for lpage percpu first chunk allocator ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Jan Beulich <JBeulich@novell.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
---

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