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Commit 053c525f authored by Jens Axboe's avatar Jens Axboe
Browse files

buffer: switch do_emergency_thaw() away from pdflush_operation() 



This is (again) a preparatory patch similar to commit
a2a9537a. It open codes a simple
async way of executing do_thaw_all() out of context, so we can get
rid of pdflush.

Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 329007ce

fs/buffer.c

+9 −2
Original line number Original line Diff line number Diff line
@@ -547,7 +547,7 @@ static int osync_buffers_list(spinlock_t *lock, struct list_head *list) 
	return err;

	return err;

}

}





void do_thaw_all(unsigned long unused)

void do_thaw_all(struct work_struct *work)

{

{

	struct super_block *sb;

	struct super_block *sb;

	char b[BDEVNAME_SIZE];

	char b[BDEVNAME_SIZE];
@@ -567,6 +567,7 @@ void do_thaw_all(unsigned long unused) 
			goto restart;

			goto restart;

	}

	}

	spin_unlock(&sb_lock);

	spin_unlock(&sb_lock);

	kfree(work);

	printk(KERN_WARNING "Emergency Thaw complete\n");

	printk(KERN_WARNING "Emergency Thaw complete\n");

}

}
@@ -577,7 +578,13 @@ void do_thaw_all(unsigned long unused) 
 */

 */

void emergency_thaw_all(void)

void emergency_thaw_all(void)

{

{

	pdflush_operation(do_thaw_all, 0);

	struct work_struct *work;



	work = kmalloc(sizeof(*work), GFP_ATOMIC);

	if (work) {

		INIT_WORK(work, do_thaw_all);

		schedule_work(work);

	}

}

}





/**

/**