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Groups > linux.kernel > #1672028
| From | Marc Herbert <Marc.Herbert@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] kernel/watchdog: fix spurious hard lockups |
| Date | 2017-06-21 23:10 +0200 |
| Message-ID | <tUV2W-3fo-19@gated-at.bofh.it> (permalink) |
| References | <tUz2p-5x0-1@gated-at.bofh.it> <tUzYu-65l-11@gated-at.bofh.it> <tUArv-6wp-5@gated-at.bofh.it> <tUBxg-7al-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 20/06/17 17:12, Prarit Bhargava wrote: >>> Hmm ... odd that I haven't seen this. We're running a pretty wide >>> variety of systems here. Do you have a reproducer? I'd like to see >>> this occur on production HW. "Production" is where this patch was born and still lives right now: https://chromium-review.googlesource.com/c/506327/ >> It only happens on a few specific CPU SKUs with a very wide Turbo range. > > Which ones? > The ones with turbo mode > 2.5 x TSC_MHz when you stress them hard and long enough. Simple maths: just compare the soft and hard timers in the code. The factor 3 moves the condition to: turbo > 7.5 x TSC_MHz.
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[PATCH] kernel/watchdog: fix spurious hard lockups kan.liang@intel.com - 2017-06-20 23:40 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Andrew Morton <akpm@linux-foundation.org> - 2017-06-21 00:10 +0200
RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-21 14:50 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Don Zickus <dzickus@redhat.com> - 2017-06-21 15:50 +0200
RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-21 16:20 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Prarit Bhargava <prarit@redhat.com> - 2017-06-21 00:40 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Andi Kleen <ak@linux.intel.com> - 2017-06-21 01:10 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Prarit Bhargava <prarit@redhat.com> - 2017-06-21 02:20 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Marc Herbert <Marc.Herbert@intel.com> - 2017-06-21 23:10 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Don Zickus <dzickus@redhat.com> - 2017-06-21 15:50 +0200
RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-21 16:10 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Michal Hocko <mhocko@kernel.org> - 2017-06-28 13:50 +0200
RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-28 15:30 +0200
RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-28 16:40 +0200
Re: [PATCH] kernel/watchdog: fix spurious hard lockups Michal Hocko <mhocko@kernel.org> - 2017-06-28 16:40 +0200
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