Hello! On Sun 08-12-24 17:58:42, Klara Modin wrote: > On 2024-11-15 16:30, Josef Bacik wrote: > > FS_PRE_ACCESS or FS_PRE_MODIFY will be generated on page fault depending > > on the faulting method. > > > > This pre-content event is meant to be used by hierarchical storage > > managers that want to fill in the file content on first read access. > > > > Export a simple helper that file systems that have their own ->fault() > > will use, and have a more complicated helper to be do fancy things with > > in filemap_fault. > > > > This patch (0790303ec869d0fd658a548551972b51ced7390c in next-20241206) > interacts poorly with some programs which hang and are stuck at 100 % sys > cpu usage (examples of programs are logrotate and atop with root > privileges). > > I also retested the new version on Jan Kara's for_next branch and it behaves > the same way. Thanks for report! What is your kernel config please? I've just fixed a bug reported by [1] which manifested in the same way with CONFIG_FANOTIFY_ACCESS_PERMISSIONS=n. Can you perhaps test with my for_next branch I've just pushed out? Thanks! Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
