Re: [RFC][PATCH v2 0/5] Experiments with overlayfs filemap

Miklos Szeredi
2019-01-29T08:58:45Z

On Tue, Jan 29, 2019 at 9:54 AM Amir Goldstein <amir73il@gmail.com> wrote:
>
> On Tue, Jan 29, 2019 at 9:17 AM Miklos Szeredi <miklos@szeredi.hu> wrote:
> >
> > On Mon, Jan 28, 2019 at 11:14 PM Amir Goldstein <amir73il@gmail.com> wrote:
> > >
> > > On Mon, Jan 28, 2019 at 11:22 PM Miklos Szeredi <miklos@szeredi.hu> wrote:
> > > >
> > > > On Mon, Jan 28, 2019 at 10:17 PM Miklos Szeredi <miklos@szeredi.hu> wrote:
> > > >
> > > > > Trying to put some code together...
> > > >
> > > > Very rudimentary patch attached. It doens't do direct IO yet, but
> > > > demonstrates what I meant about achoring the upper file in the inode.
> > > >
> > >
> > > Code looks good, but blows up on xfstests, so I'll wait for a baked patch
> > > before testing.
> > >
> > > > Also found the trick to actually make writeback work:
> > > > super_setup_bdi() call in fill_super...
> > > >
> > >
> > > Cool, but when adding only setup_bdi() this to my code, I still don't see any
> > > writeback. No writeback observed with your patch as well.
> >
> > I did observe writeback, but haven't done much testing. Will
> > hopefully get this into a better shape today.
> >
>
> OK, I see the writebacks. Didn't see them with test:
>
> # ./run --ov --samefs --recycle rename-new-pop-dir

Which branch is this? Master doesn't have --recycle.

Thanks,
Miklos