Re: [PATCH 0/5] Volatile fanotify marks

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On Thu, Mar 17, 2022 at 4:12 PM Jan Kara <jack@xxxxxxx> wrote:
>
> On Mon 07-03-22 17:57:36, Amir Goldstein wrote:
> > Jan,
> >
> > Following RFC discussion [1], following are the volatile mark patches.
> >
> > Tested both manually and with this LTP test [2].
> > I was struggling with this test for a while because drop caches
> > did not get rid of the un-pinned inode when test was run with
> > ext2 or ext4 on my test VM. With xfs, the test works fine for me,
> > but it may not work for everyone.
> >
> > Perhaps you have a suggestion for a better way to test inode eviction.
>
> Drop caches does not evict dirty inodes. The inode is likely dirty because
> you have chmodded it just before drop caches. So I think calling sync or
> syncfs before dropping caches should fix your problems with ext2 / ext4.  I
> suspect this has worked for XFS only because it does its private inode
> dirtiness tracking and keeps the inode behind VFS's back.

I did think of that and tried to fsync which did not help, but maybe
I messed it up somehow.

Thanks,
Amir.



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