Re: [PATCH RESEND V5,2/2] mm: shmem: implement POSIX_FADV_[WILL|DONT]NEED for shmem

[Andrew Morton]

On Tue, 7 Jun 2022 20:22:34 +0530 Charan Teja Kalla <quic_charante@xxxxxxxxxxx> wrote:

> > Is there an actual userspace/driver combination which will use this? 
> > Has the new feature been tested in such an arrangement?  And if so,
> > which driver(s)?
> > 
> 
> Currently my organization is using this setup where it does makes use of
> the shmem infrastructure to allocate the pages and its fd is passed to
> the user. The user is now deciding on when to reclaim these pages to
> free up the memory through already presented vfs_fadvise(DONTNEED)
> system call and bringing back them through vfs_fadvise(WILLNEED), when

OK, thanks.  Please capture all these thoughts in the [0/n] changelog,
leave it a few days for reviewer input then resend and I'll take a
closer look.

The patches don't seem to be getting a lot of traction.