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Groups > linux.kernel > #1318995
| From | "Michael S. Tsirkin" <mst@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2 0/3] x86: faster mb()+other barrier.h tweaks |
| Date | 2016-01-27 15:20 +0100 |
| Message-ID | <qVz6V-4J4-1@gated-at.bofh.it> (permalink) |
| References | (1 earlier) <qQfBT-7kg-5@gated-at.bofh.it> <qV7aG-1qe-7@gated-at.bofh.it> <qVjvc-1Q5-11@gated-at.bofh.it> <qVyXg-4EQ-7@gated-at.bofh.it> <qVz6V-4J4-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Jan 27, 2016 at 03:14:09PM +0100, Peter Zijlstra wrote: > On Wed, Jan 27, 2016 at 04:07:56PM +0200, Michael S. Tsirkin wrote: > > mwait_idle is the only one that calls smp_mb and not mb() > > I couldn't figure out why - original patches did mb() > > there. > > That probably wants changing. That said, running UP kernels on affected > hardware is 'unlikely' :-) OK that's nice. After changing that one place, everyone calls mb() around clflush so it should be safe to change smp_mb away from mfence without breaking things. I'm testing v4 that does this. -- MST
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Re: [PATCH v2 0/3] x86: faster mb()+other barrier.h tweaks "Michael S. Tsirkin" <mst@redhat.com> - 2016-01-26 09:30 +0100
Re: [PATCH v2 0/3] x86: faster mb()+other barrier.h tweaks "H. Peter Anvin" <hpa@zytor.com> - 2016-01-26 22:40 +0100
Re: [PATCH v2 0/3] x86: faster mb()+other barrier.h tweaks "Michael S. Tsirkin" <mst@redhat.com> - 2016-01-27 15:10 +0100
Re: [PATCH v2 0/3] x86: faster mb()+other barrier.h tweaks "Michael S. Tsirkin" <mst@redhat.com> - 2016-01-27 15:20 +0100
Re: [PATCH v2 0/3] x86: faster mb()+other barrier.h tweaks Peter Zijlstra <peterz@infradead.org> - 2016-01-27 15:20 +0100
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