On Mon, Jan 28, 2019 at 11:14 PM Amir Goldstein <amir73il@xxxxxxxxx> wrote: > > On Mon, Jan 28, 2019 at 11:22 PM Miklos Szeredi <miklos@xxxxxxxxxx> wrote: > > > > On Mon, Jan 28, 2019 at 10:17 PM Miklos Szeredi <miklos@xxxxxxxxxx> 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. > Speaking of which, did you read the warning sign above > simple_write_end()? Aren't you missing the mark_inode_dirty() call? That's in __set_page_dirty_nobuffers(). Thanks, Miklos
