# Re: \[PATCH v3 1/2\] mm: introduce process\_mrelease system call

- From: Michal Hocko \<mhocko@suse.com\>
- Date: 2021-07-23 06:20:30 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2021/07/1455552
- Thread: https://ratatoskr.run/linux-api/2021/07/1455552/t.md

```text
On Thu 22-07-21 21:47:56, Suren Baghdasaryan wrote:
> On Thu, Jul 22, 2021, 7:04 PM Shakeel Butt [ref] wrote:
> 
> > On Thu, Jul 22, 2021 at 6:14 PM Suren Baghdasaryan [ref]
> > wrote:
> > >
> > [...]
> > > +
> > > +       mmap_read_lock(mm);
> >
> > How about mmap_read_trylock(mm) and return -EAGAIN on failure?
> >
> 
> That sounds like a good idea. Thanks! I'll add that in the next respin.

Why is that a good idea? Can you do anything meaningful about the
failure other than immediately retry the syscall and hope for the best?

-- 
Michal Hocko
SUSE Labs
```