From: Dave Chinner <dchinner@redhat.com>
Date: Thu, 27 May 2010 01:58:13 +0000 (+0000)
Subject: xfs: fix might_sleep() warning when initialising per-ag tree
X-Git-Tag: v2.6.35-rc2~3^2^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b98b6f3e1534bba2efcd5b16318945cf2218d99;p=pandora-kernel.git

xfs: fix might_sleep() warning when initialising per-ag tree

The use of radix_tree_preload() only works if the radix tree was
initialised without the __GFP_WAIT flag. The per-ag tree uses
GFP_NOFS, so does not trigger allocation of new tree nodes from the
preloaded array. Hence it enters the allocator with a spinlock held
and triggers the might_sleep() warnings.

Reported-by; Chris Mason <chris.mason@oracle.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
---

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