From: Andi Kleen <ak@muc.de>
Date: Wed, 27 Jul 2005 18:43:50 +0000 (-0700)
Subject: [PATCH] Undo mempolicy shared policy rbtree microoptimization
X-Git-Tag: v2.6.13-rc4~25^2~141
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=90c5029e471636f21221bf66b9a46ada2ab79a22;p=pandora-kernel.git

[PATCH] Undo mempolicy shared policy rbtree microoptimization

All mempolicy changes must be inside the spinlock and readding the rb_erase
prevents a crash while doing:

> echo "1" > /tmp/numatest
> numactl --length=0x4000 --shm /tmp/numatest --localalloc
> numactl --length=0x2000 --offset=0 --shm /tmp/numatest --membind=0
> numactl --length=0x2000 --offset=0x2000 --shm /tmp/numatest --membind=1
> ipcs
> ipcrm -M "the_key_value_of_this_shm_area"

Based on a patch by John Blackwood

Cc: <john.blackwood@ccur.com>
Cc: <andrea@suse.de>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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