On Mon, Apr 10, 2017 at 09:06:23PM -0600, Andreas Dilger wrote: > Hi Ted, > now that FAST'17 is behind us, is there any plan to land the ext4-lazy code > (SMR optimizations) to the upstream kernel? This looks like it improves > some workloads even without SMR disks, and doesn't have any noticeable > overhead for other workloads. > > I'd guess the one thing that we might want to do is still allow the journal > to optionally checkpoint the metadata to the filesystem in the background, > when the filesystem is otherwise idle, so that in case of journal loss for > some reason the whole filesystem is not lost? Don't forget to fix jbd2_bh_submit_read to behave when JBD2_FLAG_ESCAPE is set on a journal data block. --D > > Cheers, Andreas > > > > >
