Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring buffer overwrite

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring buffer overwrite
Date	2017-08-10 11:30 +0200
Message-ID	<ucRWW-3Ia-3@gated-at.bofh.it> (permalink)
References	<ubKut-59V-3@gated-at.bofh.it> <ubKut-59V-1@gated-at.bofh.it> <ucA02-8w8-21@gated-at.bofh.it> <ucKC6-79t-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Aug 10, 2017 at 10:32:16AM +0900, Byungchul Park wrote:
> On Wed, Aug 09, 2017 at 04:16:05PM +0200, Peter Zijlstra wrote:
> > Hehe, _another_ scheme...
> > 
> > Yes I think this works.. but I had just sort of understood the last one.
> > 
> > How about I do this on top? That I think is a combination of what I
> > proposed last and your single invalidate thing. Combined they solve the
> > problem with the least amount of extra storage (a single int).
> 
> I'm sorry for saying that.. I'm not sure if this works well.

OK, I'll sit on the patch a little while, if you could share your
concerns then maybe I can improve the comments ;-)

Thread

[PATCH v8 06/14] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-08-07 09:20 +0200
  Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Peter Zijlstra <peterz@infradead.org> - 2017-08-09 16:20 +0200
    Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-08-10 03:40 +0200
      Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Peter Zijlstra <peterz@infradead.org> - 2017-08-10 11:30 +0200
    Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-08-10 12:40 +0200
  Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Boqun Feng <boqun.feng@gmail.com> - 2017-08-10 14:00 +0200
    RE: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring buffer overwrite "Byungchul Park" <byungchul.park@lge.com> - 2017-08-10 14:30 +0200
      Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Boqun Feng <boqun.feng@gmail.com> - 2017-08-10 15:00 +0200
        Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Boqun Feng <boqun.feng@gmail.com> - 2017-08-10 15:20 +0200
          Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-08-11 02:50 +0200
          Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-08-11 05:50 +0200
            Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Boqun Feng <boqun.feng@gmail.com> - 2017-08-11 10:10 +0200
              Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-08-11 11:00 +0200
                Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-08-11 11:50 +0200
                Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <max.byungchul.park@gmail.com> - 2017-08-11 15:10 +0200
        Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-08-11 02:50 +0200
          Re: [PATCH v8 06/14] lockdep: Detect and handle hist_lock ring  buffer overwrite Boqun Feng <boqun.feng@gmail.com> - 2017-08-11 03:10 +0200
  [tip:locking/core] locking/lockdep: Detect and handle hist_lock  ring buffer overwrite tip-bot for Byungchul Park <tipbot@zytor.com> - 2017-08-10 14:30 +0200

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