af_unix: use freezable blocking calls in read

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Avoid waking up every thread sleeping in read call on an AF_UNIX
socket 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>

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Colin Cross 2013-05-06 23:50:21 +00:00 • committed by Rafael J. Wysocki

parent a2d5f1f5d9

commit 2b15af6f95

1 changed files with 2 additions and 1 deletions

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net/unix/af_unix.c

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