RE: [PATCH v5 06/13] lockdep: Implement crossrelease feature

From	"byungchul.park" <byungchul.park@lge.com>
Newsgroups	linux.kernel
Subject	RE: [PATCH v5 06/13] lockdep: Implement crossrelease feature
Date	2017-03-02 07:20 +0100
Message-ID	<tgsfL-6BU-1@gated-at.bofh.it> (permalink)
References	<t0YjD-4z4-5@gated-at.bofh.it> <t0Ytl-4D1-41@gated-at.bofh.it> <tfVWy-rZ-9@gated-at.bofh.it> <tgqQF-5t3-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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> -----Original Message-----
> From: Matthew Wilcox [mailto:willy@infradead.org]
> Sent: Thursday, March 02, 2017 1:20 PM
> To: Peter Zijlstra
> Cc: Byungchul Park; mingo@kernel.org; tglx@linutronix.de;
> walken@google.com; boqun.feng@gmail.com; kirill@shutemov.name; linux-
> kernel@vger.kernel.org; linux-mm@kvack.org; iamjoonsoo.kim@lge.com;
> akpm@linux-foundation.org; npiggin@gmail.com
> Subject: Re: [PATCH v5 06/13] lockdep: Implement crossrelease feature
> 
> On Tue, Feb 28, 2017 at 07:15:47PM +0100, Peter Zijlstra wrote:
> > (And we should not be returning to userspace with locks held anyway --
> > lockdep already has a check for that).
> 
> Don't we return to userspace with page locks held, eg during async
> directio?

Hello,

I think that the check when returning to user with crosslocks held
should be an exception. Don't you think so?

Thanks,
Byungchul

Thread

Re: [PATCH v5 06/13] lockdep: Implement crossrelease feature Matthew Wilcox <willy@infradead.org> - 2017-03-02 05:50 +0100
  RE: [PATCH v5 06/13] lockdep: Implement crossrelease feature "byungchul.park" <byungchul.park@lge.com> - 2017-03-02 07:20 +0100
    Re: [PATCH v5 06/13] lockdep: Implement crossrelease feature Matthew Wilcox <willy@infradead.org> - 2017-03-02 15:50 +0100
      Re: [PATCH v5 06/13] lockdep: Implement crossrelease feature Byungchul Park <byungchul.park@lge.com> - 2017-03-03 01:00 +0100
        Re: [PATCH v5 06/13] lockdep: Implement crossrelease feature Byungchul Park <byungchul.park@lge.com> - 2017-03-05 09:10 +0100

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