On Tue, Oct 24, 2017 at 03:22:23PM -0400, Mike Snitzer wrote:
> On Fri, Oct 20 2017 at 1:24am -0400,
> Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx> wrote:
>
> > Now that we have the ability log filesystem writes using a flat buffer, add
> > support for DAX. Unfortunately we can't easily track data that has been
> > written via mmap() now that the dax_flush() abstraction was removed by this
> > commit:
> >
> > commit c3ca015fab6d ("dax: remove the pmem_dax_ops->flush abstraction")
> >
> > Otherwise we could just treat each flush as a big write, and store the data
> > that is being synced to media. It may be worthwhile to add the dax_flush()
> > entry point back, just as a notifier so we can do this logging.
> >
> > The motivation for this support is the need for an xfstest that can test
> > the new MAP_SYNC DAX flag. By logging the filesystem activity with
> > dm-log-writes we can show that the MAP_SYNC page faults are writing out
> > their metadata as they happen, instead of requiring an explicit
> > msync/fsync.
> >
> > Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
>
> I've picked this up, please see:
> https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=for-4.15/dm&id=ae613bbb0144e84cb3c0ebfa9f4fd4d1507c2f0e
>
> I tweaked the header and tweaked a couple whitespace nits. Also
> switched version bump from 1.0.1 to 1.1.0.
>
> Thanks,
> Mike
Sure, your tweaks look fine. Thanks!
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