tree 6f93f77708c6f1f85b9394d102d12548aa2fd057
parent ca57f450507548d2eb14a15764e0f159c784c842
author Vineeth Vijayan <vneethv@linux.ibm.com> 1592491365 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1599125064 +0200

s390/cio: add cond_resched() in the slow_eval_known_fn() loop

[ Upstream commit 0b8eb2ee9da1e8c9b8082f404f3948aa82a057b2 ]

The scanning through subchannels during the time of an event could
take significant amount of time in case of platforms with lots of
known subchannels. This might result in higher scheduling latencies
for other tasks especially on systems with a single CPU. Add
cond_resched() call, as the loop in slow_eval_known_fn() can be
executed for a longer duration.

Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>