Re: [GIT PULL] killable rwsems for v4.7

[Michal Hocko]

On Mon 16-05-16 13:32:28, Linus Torvalds wrote:
> On Mon, May 16, 2016 at 7:55 AM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> >
> > This tree, by Michal Hocko, implements down_write_killable(). The main usecase
> > will be to update mm_sem usage sites to use this new API,
> 
> Hmm. Is somebody (Michal?) looking at down_read_killable() too?

I wasn't because I didn't need it for my oom_reaper use case.

> The VFS layer will want it with the pending parallel lookup code - the
> inode semaphore is being converted to a rwsem, and there's a couple of
> "killable" users.. The first step actually just wants to the exclusive
> case (ie the write case that this adds), but I think the readdir code
> could really use a reading version too..

This is more a question for Al but I do not think adding killable read
lock is a big deal. I can certainly help with it.
-- 
Michal Hocko
SUSE Labs