From: Kirill Korotaev <dev@openvz.org>
Date: Fri, 23 Jun 2006 09:03:50 +0000 (-0700)
Subject: [PATCH] printk() should not be called under zone->lock
X-Git-Tag: v2.6.18-rc1~1081^2~159
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f9de51a4a98ba32f839903b7d009788bc2c295d;p=pandora-kernel.git

[PATCH] printk() should not be called under zone->lock

This patch fixes printk() under zone->lock in show_free_areas().  It can be
unsafe to call printk() under this lock, since caller can try to
allocate/free some memory and selfdeadlock on this lock.  I found
allocations/freeing mem both in netconsole and serial console.

This issue was faced in reallity when meminfo was periodically printed for
debug purposes and netconsole was used.

Signed-off-by: Kirill Korotaev <dev@openvz.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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