On Wed, Dec 12, 2012 at 03:49:49PM +1100, Dave Chinner wrote: [cut...] > > > > Hence, I wonder whether or not we could revert stable page write temporarily. > > > > After it is improved, we could add it back again. > > > > > > The plan is to turn it off for filesystems/devices that don't > > > require it. That list of devices will grow in future, so you > > > probably should plan to handle latencies in the application > > > properly... > > > > I wonder whether we can provide a sysctl to turn on/off stable page > > write. At least we need to give sysadmin an opportunity to control it. > > That's already been considered and discarded because turning off > stable pages on devices that require it will cause validation or > data corruption problems. The discussion was for these patches (and > I think a followup series as well): > > http://www.spinics.net/lists/linux-fsdevel/msg59421.html Thanks for pointing out. So now it seems that only I can do is to present a proposal to revert stable page write temporarily because it causes a huge latency for some applications. Thanks, - Zheng -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
