linux-kernel - [PATCH 1/1] PM: Making bdi threads non-freezable

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Message-ID: <B85A65D85D7EB246BE421B3FB0FBB59301DE1EBC66@dbde02.ent.ti.com>
Date:	Mon, 2 Nov 2009 16:33:42 +0530
From:	"Dasgupta, Romit" <romit@...com>
To:	"viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
	"rjw@...k.pl" <rjw@...k.pl>
CC:	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...ts.linux-foundation.org" 
	<linux-pm@...ts.linux-foundation.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>
Subject: [PATCH 1/1] PM: Making bdi threads non-freezable

Fixes the case when bdi threads are in the refrigerator but file system sync
can happen after this. This is possible in MMC when CONFIG_MMC_UNSAFE_RESUME is
not set.

Signed-off-by: Romit Dasgupta <romit@...com>
---
 
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 9d5360c..661229d 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -956,7 +956,6 @@ int bdi_writeback_task(struct bdi_writeback *wb)
 
 		wait_jiffies = msecs_to_jiffies(dirty_writeback_interval * 10);
 		schedule_timeout_interruptible(wait_jiffies);
-		try_to_freeze();
 	}
 
 	return 0;
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 5a37e20..9383271 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -273,7 +273,6 @@ static void bdi_task_init(struct backing_dev_info *bdi,
 	spin_unlock(&bdi->wb_lock);
 
 	tsk->flags |= PF_FLUSHER | PF_SWAPWRITE;
-	set_freezable();
 
 	/*
 	 * Our parent may run at a different priority, just set us to normal
@@ -419,7 +418,6 @@ static int bdi_forker_task(void *ptr)
 			spin_unlock_bh(&bdi_lock);
 			wait = msecs_to_jiffies(dirty_writeback_interval * 10);
 			schedule_timeout(wait);
-			try_to_freeze();
 			continue;
 		}

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