From: Nick Piggin <npiggin@kernel.dk>
Date: Fri, 7 Jan 2011 06:49:39 +0000 (+1100)
Subject: fs: dcache avoid starvation in dcache multi-step operations
X-Git-Tag: v2.6.38-rc1~468^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=58db63d086790eec2ed433f9d8c4962239809cf8;p=pandora-kernel.git

fs: dcache avoid starvation in dcache multi-step operations

Long lived dcache "multi-step" operations which retry on rename seq can
be starved with a lot of rename activity. If they fail after the 1st pass,
take the rename_lock for writing to avoid further starvation.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
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