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Commit 4b438a23 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki Committed by Linus Torvalds
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[PATCH] md: do not freeze md threads for suspend 



If there's a swap file on a software RAID, it should be possible to use this
file for saving the swsusp's suspend image.  Also, this file should be
available to the memory management subsystem when memory is being freed before
the suspend image is created.

For the above reasons it seems that md_threads should not be frozen during the
suspend and the appended patch makes this happen, but then there is the
question if they don't cause any data to be written to disks after the suspend
image has been created, provided that all filesystems are frozen at that time.

Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 0692c6b1

drivers/md/md.c

+1 −1
Original line number Diff line number Diff line
@@ -4486,6 +4486,7 @@ static int md_thread(void * arg) 
	 * many dirty RAID5 blocks.

	 */



	current->flags |= PF_NOFREEZE;

	allow_signal(SIGKILL);

	while (!kthread_should_stop()) {
@@ -4502,7 +4503,6 @@ static int md_thread(void * arg) 
			 test_bit(THREAD_WAKEUP, &thread->flags)

			 || kthread_should_stop(),

			 thread->timeout);

		try_to_freeze();



		clear_bit(THREAD_WAKEUP, &thread->flags);