commit 32f2e807a3938b24d0831211e6094f9e44b2fc83
author Vivek Goyal <vgoyal@redhat.com> Thu Jul 09 22:13:16 2009 +0200
committer Jens Axboe <axboe@carl.(none)> Fri Jul 10 20:31:54 2009 +0200
tree 80baac86022bc36bc07a787008642149fa205642
parent ecb554a846f8e9d2a58f6d6c118168a63ac065aa

cfq-iosched: reset oom_cfqq in cfq_set_request()

In case memory is scarce, we now default to oom_cfqq. Once memory is
available again, we should allocate a new cfqq and stop using oom_cfqq for
a particular io context.

Once a new request comes in, check if we are using oom_cfqq, and if yes,
try to allocate a new cfqq.

Tested the patch by forcing the use of oom_cfqq and upon next request thread
realized that it was using oom_cfqq and it allocated a new cfqq.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>