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Groups > linux.kernel > #1736614
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC PATCH v2 1/2] membarrier: Provide register expedited private command |
| Date | 2017-09-21 14:20 +0200 |
| Message-ID | <us8Cu-Sx-15@gated-at.bofh.it> (permalink) |
| References | <urcRQ-47U-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Sep 18, 2017 at 06:36:47PM -0400, Mathieu Desnoyers wrote:
> @@ -3373,6 +3362,7 @@ static void __sched notrace __schedule(bool preempt)
>
> /* Also unlocks the rq: */
> rq = context_switch(rq, prev, next, &rf);
> + membarrier_arch_sched_in(prev, next);
That's wrong iirc; we just switched stacks, you cannot use @prev and
@next.
> } else {
> rq->clock_update_flags &= ~(RQCF_ACT_SKIP|RQCF_REQ_SKIP);
> rq_unlock_irq(rq, &rf);
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[RFC PATCH v2 1/2] membarrier: Provide register expedited private command Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2017-09-19 00:40 +0200
[RFC PATCH 2/2] membarrier: selftest: Test private expedited cmd Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2017-09-19 00:40 +0200
Re: [RFC PATCH v2 1/2] membarrier: Provide register expedited private command Peter Zijlstra <peterz@infradead.org> - 2017-09-21 14:20 +0200
Re: [RFC PATCH v2 1/2] membarrier: Provide register expedited private command Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2017-09-21 17:20 +0200
Re: [RFC PATCH v2 1/2] membarrier: Provide register expedited private command "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-21 17:30 +0200
Re: [RFC PATCH v2 1/2] membarrier: Provide register expedited private command Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2017-09-21 17:50 +0200
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