On Fri, Oct 14, 2011 at 03:14:34PM -0400, Mikulas Patocka wrote:
@@ -999,15 +1013,19 @@ again:
* someone is doing some writes simultaneously with us --- in
* this case, stop dropping the lock.
*/
if (dropped_lock)
goto again;
}
wake_up(&c->free_buffer_wait);
dm_bufio_unlock(c);
- a = xchg(&c->async_write_error, 0);
+ if (likely(!c->async_write_error))
+ a = 0;
+ else
+ a = xchg(&c->async_write_error, 0);
f = dm_bufio_issue_flush(c);
I didn't change this. Is it also fixing a preexisting issue?
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