[dm-devel] Bcache upstreaming
Mike Snitzer
snitzer at redhat.com
Thu Jan 31 23:08:00 UTC 2013
On Thu, Jan 31 2013 at 5:25pm -0500,
Kent Overstreet <kent.overstreet at gmail.com> wrote:
> On Thu, Jan 31, 2013 at 2:17 PM, Mike Snitzer <snitzer at redhat.com> wrote:
> > Ah, yeah I had a typo in my script. When I fixed it I get a BUG (with
> > your latest bcache code) when I try to mkfs.xfs /dev/bcache0:
>
> Heh, that's the dev branch - you don't want to be running the dev
> branch, there's a lot of buggy crap in there and it almost definitely
> corrupts data. Testing branch should be good, though.
OK, I'll pick up changes from -testing until directed elsewhere.
BTW, here are couple things I've noticed with bcache:
- The log messages seem to have an extra newline at the end.
- bcache doesn't appear to be establishing proper holders on the devices
it uses for the backing and cache devices.
- lsblk doesn't show any associations with bcache devices.
- the fio utility isn't able to get any stats for the bcache device or
the devices bcache uses.
- if I 'stop' a bcache device (using sysfs) while it is mounted; once I
unmount the filesystem the device that bcache was using as a cache
still has an open count of 1 but the bcache device then no longer
exists
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