linux-kernel - [PATCH] xfs: clear PF_NOFREEZE for xfsaild kthread

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Message-ID: <alpine.LNX.2.00.1510261552160.8998@pobox.suse.cz>
Date:	Mon, 26 Oct 2015 15:53:40 +0900 (KST)
From:	Jiri Kosina <jikos@...nel.org>
To:	Dave Chinner <david@...morbit.com>, Christoph Hellwig <hch@....de>
cc:	xfs@....sgi.com, linux-kernel@...r.kernel.org
Subject: [PATCH] xfs: clear PF_NOFREEZE for xfsaild kthread

From: Jiri Kosina <jkosina@...e.cz>

Since xfsaild has been converted to kthread in 0030807c, it calls 
try_to_freeze() during every AIL push iteration. It however doesn't set 
itself as freezable, and therefore this try_to_freeze() will never do 
anything.

Before (hopefully eventually) kthread freezing gets converted to fileystem 
freezing, we'd rather mark xfsaild freezable (as it can generate I/O 
during suspend).

Signed-off-by: Jiri Kosina <jkosina@...e.cz>
---
 fs/xfs/xfs_trans_ail.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 1098cf4..06d1a29 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -497,6 +497,7 @@ xfsaild(
 	long		tout = 0;	/* milliseconds */
 
 	current->flags |= PF_MEMALLOC;
+	set_freezable();
 
 	while (!kthread_should_stop()) {
 		if (tout && tout <= 20)
-- 
Jiri Kosina
SUSE Labs

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