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Groups > linux.kernel > #1700120
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC][PATCH]: x86: clarify/fix no-op barriers for text_poke_bp() |
| Date | 2017-07-31 17:30 +0200 |
| Message-ID | <u9kNQ-7Wi-25@gated-at.bofh.it> (permalink) |
| References | <u9g7x-54B-33@gated-at.bofh.it> <u9jRN-7nb-7@gated-at.bofh.it> <u9kuu-7PW-7@gated-at.bofh.it> <u9kEa-7Ta-21@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Jul 31, 2017 at 11:16:48AM -0400, Steven Rostedt wrote: > On Mon, 31 Jul 2017 17:04:11 +0200 > Peter Zijlstra <peterz@infradead.org> wrote: > > > Well, this is x86, its a NO-OP. The only reason to write barriers like > > Is it really a nop? smp_wmb() is ever since we killed OOSTORE, and smp_rmb() is effectively (I don't think anybody uses PPRO_FENCE). The normal x86 TSO memory model doesn't need read or write barriers -- only weird and wonderful (broken) x86 bits do.
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[RFC][PATCH]: x86: clarify/fix no-op barriers for text_poke_bp() Peter Zijlstra <peterz@infradead.org> - 2017-07-31 12:30 +0200
Re: [RFC][PATCH]: x86: clarify/fix no-op barriers for text_poke_bp() Steven Rostedt <rostedt@goodmis.org> - 2017-07-31 16:30 +0200
Re: [RFC][PATCH]: x86: clarify/fix no-op barriers for text_poke_bp() Peter Zijlstra <peterz@infradead.org> - 2017-07-31 17:10 +0200
Re: [RFC][PATCH]: x86: clarify/fix no-op barriers for text_poke_bp() Steven Rostedt <rostedt@goodmis.org> - 2017-07-31 17:20 +0200
Re: [RFC][PATCH]: x86: clarify/fix no-op barriers for text_poke_bp() Peter Zijlstra <peterz@infradead.org> - 2017-07-31 17:30 +0200
Re: [RFC][PATCH]: x86: clarify/fix no-op barriers for text_poke_bp() Jiri Kosina <jikos@kernel.org> - 2017-08-01 11:20 +0200
[tip:x86/asm] x86: Clarify/fix no-op barriers for text_poke_bp() tip-bot for Peter Zijlstra <tipbot@zytor.com> - 2017-08-10 18:50 +0200
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