tree 9b95aca67ea7c9e87254da501f73cca64504051d
parent 84e9e03c55c2456799ab19f1d577e72f721fdd39
author Jens Axboe <jens.axboe@oracle.com> 1203411749 +0100
committer Jens Axboe <jens.axboe@oracle.com> 1203411840 +0100

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>