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

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On Mon 16-05-16 13:32:28, Linus Torvalds wrote:
> On Mon, May 16, 2016 at 7:55 AM, Ingo Molnar <mingo@kernel.org> 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

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[GIT PULL] killable rwsems for v4.7 Ingo Molnar <mingo@kernel.org> - 2016-05-16 17:00 +0200
  Re: [GIT PULL] killable rwsems for v4.7 Linus Torvalds <torvalds@linux-foundation.org> - 2016-05-16 22:40 +0200
    Re: [GIT PULL] killable rwsems for v4.7 Michal Hocko <mhocko@kernel.org> - 2016-05-17 09:10 +0200
      Re: [GIT PULL] killable rwsems for v4.7 Al Viro <viro@ZenIV.linux.org.uk> - 2016-05-17 20:10 +0200
        Re: [GIT PULL] killable rwsems for v4.7 Linus Torvalds <torvalds@linux-foundation.org> - 2016-05-17 20:40 +0200
    Re: [GIT PULL] killable rwsems for v4.7 Peter Zijlstra <peterz@infradead.org> - 2016-05-17 13:10 +0200

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