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Re: [PATCH v2] floppy: refactor open() flags handling (was Re: mm: uninterruptable tasks hanged on mmap_sem)

From Jiri Kosina <jikos@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH v2] floppy: refactor open() flags handling (was Re: mm: uninterruptable tasks hanged on mmap_sem)
Date 2016-02-05 17:50 +0100
Message-ID <qYRK1-2JM-1@gated-at.bofh.it> (permalink)
References <qXQdk-cA-9@gated-at.bofh.it> <qYzDr-7yk-5@gated-at.bofh.it> <qYOVR-SY-29@gated-at.bofh.it> <qYP5y-Xo-43@gated-at.bofh.it> <qYPyx-1p9-3@gated-at.bofh.it>
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On Fri, 5 Feb 2016, Dmitry Vyukov wrote:

> I don't have any objections. And I agree that it does not make sense
> to spend any considerable time on optimizing this driver.

Yeah, on a second thought this definitely is the way how to deal with this 
in this particular driver.

> > Alternatively we can take more conservative aproach, accept the
> > nonblocking flag, but do the regular business of the driver.
> >
> > Actually, let's try that, to make sure that we don't introduce userspace
> > breakage.
> >
> > Could you please retest with the patch below?
> 
> Reapplied.

Thanks. Once/if you confirm that syzkaller is not able to reproduce the 
problem any more, I'll queue it and push to Jens.

-- 
Jiri Kosina
SUSE Labs

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Thread

mm: uninterruptable tasks hanged on mmap_sem Dmitry Vyukov <dvyukov@google.com> - 2016-02-02 22:00 +0100
  Re: mm: uninterruptable tasks hanged on mmap_sem Jiri Kosina <jikos@kernel.org> - 2016-02-02 22:10 +0100
    Re: mm: uninterruptable tasks hanged on mmap_sem Dmitry Vyukov <dvyukov@google.com> - 2016-02-02 22:20 +0100
      Re: mm: uninterruptable tasks hanged on mmap_sem Jiri Kosina <jikos@kernel.org> - 2016-02-02 22:30 +0100
        Re: mm: uninterruptable tasks hanged on mmap_sem Dmitry Vyukov <dvyukov@google.com> - 2016-02-02 22:40 +0100
      Re: mm: uninterruptable tasks hanged on mmap_sem Dmitry Vyukov <dvyukov@google.com> - 2016-02-02 22:30 +0100
  Re: mm: uninterruptable tasks hanged on mmap_sem Dmitry Vyukov <dvyukov@google.com> - 2016-02-03 14:20 +0100
  Re: mm: uninterruptable tasks hanged on mmap_sem Jiri Kosina <jikos@kernel.org> - 2016-02-03 14:20 +0100
  Re: mm: uninterruptable tasks hanged on mmap_sem Jiri Kosina <jikos@kernel.org> - 2016-02-04 00:40 +0100
  [PATCH] floppy: refactor open() flags handling (was Re: mm:  uninterruptable tasks hanged on mmap_sem) Jiri Kosina <jikos@kernel.org> - 2016-02-04 22:30 +0100
    Re: [PATCH] floppy: refactor open() flags handling (was Re: mm:  uninterruptable tasks hanged on mmap_sem) Dmitry Vyukov <dvyukov@google.com> - 2016-02-05 14:50 +0100
      [PATCH v2] floppy: refactor open() flags handling (was Re: mm:  uninterruptable tasks hanged on mmap_sem) Jiri Kosina <jikos@kernel.org> - 2016-02-05 15:00 +0100
        Re: [PATCH v2] floppy: refactor open() flags handling (was Re: mm:  uninterruptable tasks hanged on mmap_sem) Dmitry Vyukov <dvyukov@google.com> - 2016-02-05 15:30 +0100
          Re: [PATCH v2] floppy: refactor open() flags handling (was Re: mm:  uninterruptable tasks hanged on mmap_sem) Jiri Kosina <jikos@kernel.org> - 2016-02-05 17:50 +0100
            Re: [PATCH v2] floppy: refactor open() flags handling (was Re: mm:  uninterruptable tasks hanged on mmap_sem) Dmitry Vyukov <dvyukov@google.com> - 2016-02-05 22:20 +0100

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