On Wed, Aug 12, 2015 at 12:36:02AM -0700, Ming Lin wrote: > On Tue, 2015-08-11 at 17:38 -0800, Kent Overstreet wrote: > > On Tue, Aug 11, 2015 at 10:59:42AM -0700, Ming Lin wrote: > > > On Tue, 2015-08-11 at 00:34 -0800, Kent Overstreet wrote: > > > > Like in other filesystems, you can now do > > > > > > > > mount /dev/sda1 /foo > > > > mount /dev/sda1 /bar > > > > > > > > What this really means is that if the udev hook has registered the bcache device > > > > via the old style sysfs interface for caching, you'll still be able to mount the > > > > device like normal. > > > > > > Thanks! > > > > > > BTW, could you share the bcachefs long term development plans and short > > > term high priority tasks? > > > > Right now, my main priority is stabilizing it and making it usable - fixing all > > the things that people are going to trip over when they try it out. I want to > > get it somewhat more polished before I announce on linux-fsdevel. > > > > The big thing I'm working on at the moment is debugging atomic renames, I had to > > back that code out at the last minute. > > > > > I'd like to pick something to work on. Probably the debugfs tool you > > > mentioned or other things? > > > > One thing that would actually be really helpful is more benchmarking vs. > > ext4/xfs - identifying areas where there's still more performance work to do. > > > > The debugfs tool is definitely important but that's a longer term thing. If > > you're feeling productive like that feel free to keep going with it. > > > > Really though right now the main thing we need is more testing and debugging. > > I have run xfstests. Here is the results for generic tests. > http://minggr.net/pub/bcachefs/xfstests.log > > One thing is fallocate not supported yet. Is it known? > > root@bee:~# mount |grep bcache > /dev/sda on /mnt/test type bcache (rw,relatime) > > root@bee:~# fallocate -l 4096 /mnt/test/hello.c > fallocate: /mnt/test/hello.c: fallocate failed: Operation not supported I do have code for fpunch/fcollapse in another branch - but it's not entirely working yet. Fallocate itself is going to be more involved, we'll need some sort of persistent reservations which are going to be a pain... should probably look and find out what semantics btrfs implements first. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
