tree 3fbf6842e6c22f8f4af04b4e86401e442b9b2fbd
parent e2610b268bb74d24866a9578e78d8c3de90ed596
author Colin Cross <ccross@android.com> 1367884216 +0000
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1368360982 +0200

epoll: use freezable blocking call

Avoid waking up every thread sleeping in an epoll_wait call during
suspend and resume by calling a freezable blocking call.  Previous
patches modified the freezer to avoid sending wakeups to threads
that are blocked in freezable blocking calls.

This call was selected to be converted to a freezable call because
it doesn't hold any locks or release any resources when interrupted
that might be needed by another freezing task or a kernel driver
during suspend, and is a common site where idle userspace tasks are
blocked.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>