On Fri, Nov 04, 2016 at 04:46:03PM +1100, Neil Brown wrote: > As we don't wait for writes to complete in bitmap_daemon_work, they > could still be in-flight when bitmap_unplug writes again. Or when > bitmap_daemon_work tries to write again. > This can be confusing and could risk the wrong data being written last. Applied the first 3 patches, thanks! This one seems not completely solving the race condition. It's still possible bitmap_daemon_work clears BITMAP_PAGE_NEEDWRITE but hasn't dispatch the IO yet, bitmap_unplug then does nothing and thinks bitmap is updated to disk. Why don't we add locking here? Thanks, Shaohua -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
