tree a4eca4110f1b672f78191c8a8f92086b1b6ade7a
parent b70c864d3ce706571d2f3cac1d35d4fba01d6072
author Oleg Nesterov <oleg@tv-sign.ru> 1194439895 +0100
committer Jens Axboe <jens.axboe@oracle.com> 1194439895 +0100

cfq_idle_class_timer: add paranoid checks for jiffies overflow

In theory, if the queue was idle long enough, cfq_idle_class_timer may have
a false (and very long) timeout because jiffies can wrap into the past wrt
->last_end_request.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>