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Groups > linux.kernel > #1687017
| From | Byungchul Park <byungchul.park@lge.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite |
| Date | 2017-07-14 03:50 +0200 |
| Message-ID | <u2XTY-4Tk-3@gated-at.bofh.it> (permalink) |
| References | (5 earlier) <u2J4D-3Zi-23@gated-at.bofh.it> <u2JnY-4lu-11@gated-at.bofh.it> <u2JxE-4oH-7@gated-at.bofh.it> <u2Kk2-4UU-23@gated-at.bofh.it> <u2KtH-4Y8-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Jul 13, 2017 at 08:23:33PM +0900, Byungchul Park wrote: > On Thu, Jul 13, 2017 at 8:12 PM, Peter Zijlstra <peterz@infradead.org> wrote: > > On Thu, Jul 13, 2017 at 12:29:05PM +0200, Peter Zijlstra wrote: > >> On Thu, Jul 13, 2017 at 07:09:53PM +0900, Byungchul Park wrote: > >> > On Thu, Jul 13, 2017 at 11:50:52AM +0200, Peter Zijlstra wrote: > >> > > wait_for_completion(&C); > >> > > atomic_inc_return(); > >> > > > >> > > mutex_lock(A1); > >> > > mutex_unlock(A1); > >> > > > >> > > > >> > > <IRQ> > >> > > spin_lock(B1); > >> > > spin_unlock(B1); > >> > > > >> > > ... > >> > > > >> > > spin_lock(B64); > >> > > spin_unlock(B64); > >> > > </IRQ> > >> > > > >> > > > > > > Also consider the alternative: > > > > <IRQ> > > spin_lock(D); > > spin_unlock(D); > > > > complete(&C); > > </IRQ> > > > > in which case the context test will also not work. > > Context tests are done on xhlock with the release context, _not_ > acquisition context. For example, spin_lock(D) and complete(&C) are > in the same context, so the test would pass in this example. Something wrong?
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Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Peter Zijlstra <peterz@infradead.org> - 2017-07-11 18:20 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-07-12 04:10 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Peter Zijlstra <peterz@infradead.org> - 2017-07-12 10:00 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-07-13 04:10 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Peter Zijlstra <peterz@infradead.org> - 2017-07-13 10:20 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-07-13 11:00 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Peter Zijlstra <peterz@infradead.org> - 2017-07-13 12:00 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-07-13 12:20 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Peter Zijlstra <peterz@infradead.org> - 2017-07-13 12:30 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Peter Zijlstra <peterz@infradead.org> - 2017-07-13 13:20 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <max.byungchul.park@gmail.com> - 2017-07-13 13:30 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-07-14 03:50 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-07-14 08:50 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <max.byungchul.park@gmail.com> - 2017-07-13 13:20 +0200
Re: [PATCH v7 06/16] lockdep: Detect and handle hist_lock ring buffer overwrite Byungchul Park <byungchul.park@lge.com> - 2017-07-18 03:30 +0200
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