* [bcachefs] Mounting the same device multiple times now works
@ 2015-08-11 8:34 Kent Overstreet
2015-08-11 17:59 ` Ming Lin
0 siblings, 1 reply; 6+ messages in thread
From: Kent Overstreet @ 2015-08-11 8:34 UTC (permalink / raw)
To: linux-bcache; +Cc: Ming Lin
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.
Keep the bug reports coming!
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bcachefs] Mounting the same device multiple times now works
2015-08-11 8:34 [bcachefs] Mounting the same device multiple times now works Kent Overstreet
@ 2015-08-11 17:59 ` Ming Lin
2015-08-12 1:38 ` Kent Overstreet
0 siblings, 1 reply; 6+ messages in thread
From: Ming Lin @ 2015-08-11 17:59 UTC (permalink / raw)
To: Kent Overstreet; +Cc: linux-bcache
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?
I'd like to pick something to work on. Probably the debugfs tool you
mentioned or other things?
>
> Keep the bug reports coming!
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bcachefs] Mounting the same device multiple times now works
2015-08-11 17:59 ` Ming Lin
@ 2015-08-12 1:38 ` Kent Overstreet
2015-08-12 7:36 ` Ming Lin
0 siblings, 1 reply; 6+ messages in thread
From: Kent Overstreet @ 2015-08-12 1:38 UTC (permalink / raw)
To: Ming Lin; +Cc: linux-bcache
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.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bcachefs] Mounting the same device multiple times now works
2015-08-12 1:38 ` Kent Overstreet
@ 2015-08-12 7:36 ` Ming Lin
2015-08-13 4:57 ` Ming Lin
2015-08-13 5:03 ` Kent Overstreet
0 siblings, 2 replies; 6+ messages in thread
From: Ming Lin @ 2015-08-12 7:36 UTC (permalink / raw)
To: Kent Overstreet; +Cc: linux-bcache
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
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bcachefs] Mounting the same device multiple times now works
2015-08-12 7:36 ` Ming Lin
@ 2015-08-13 4:57 ` Ming Lin
2015-08-13 5:03 ` Kent Overstreet
1 sibling, 0 replies; 6+ messages in thread
From: Ming Lin @ 2015-08-13 4:57 UTC (permalink / raw)
To: Kent Overstreet; +Cc: linux-bcache
On Wed, Aug 12, 2015 at 12:36 AM, Ming Lin <mlin@kernel.org> 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?
Yes, fallocate is not implemented in bch_file_operations.
>
> 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
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bcachefs] Mounting the same device multiple times now works
2015-08-12 7:36 ` Ming Lin
2015-08-13 4:57 ` Ming Lin
@ 2015-08-13 5:03 ` Kent Overstreet
1 sibling, 0 replies; 6+ messages in thread
From: Kent Overstreet @ 2015-08-13 5:03 UTC (permalink / raw)
To: Ming Lin; +Cc: linux-bcache
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.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-08-13 5:03 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2015-08-11 8:34 [bcachefs] Mounting the same device multiple times now works Kent Overstreet
2015-08-11 17:59 ` Ming Lin
2015-08-12 1:38 ` Kent Overstreet
2015-08-12 7:36 ` Ming Lin
2015-08-13 4:57 ` Ming Lin
2015-08-13 5:03 ` Kent Overstreet
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