From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 19 Feb 2008 09:02:29 +0000 (+0100)
Subject: cfq-iosched: add hlist for browsing parallel to the radix tree
X-Git-Tag: v2.6.25-rc3~122^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ffc4e7595734cf768fa60cea8a4d545dfef8231a;p=pandora-kernel.git

cfq-iosched: add hlist for browsing parallel to the radix tree

It's cumbersome to browse a radix tree from start to finish, especially
since we modify keys when a process exits. So add a hlist for the single
purpose of browsing over all known cfq_io_contexts, used for exit,
io prio change, etc.

This fixes http://bugzilla.kernel.org/show_bug.cgi?id=9948

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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