From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
paulmck@linux.vnet.ibm.com, mingo@redhat.com, mpe@ellerman.id.au,
paulus@samba.org, benh@kernel.crashing.org, Waiman.Long@hpe.com,
boqun.feng@gmail.com, will.deacon@arm.com, dave@stgolabs.net,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>
Subject: Re: [PATCH 1/3] kernel/sched: introduce vcpu preempted check interface
Date: Tue, 28 Jun 2016 09:00:13 +0200 [thread overview]
Message-ID: <20160628070013.GC3784@osiris> (raw)
In-Reply-To: <20160627140043.GO30921@twins.programming.kicks-ass.net>
On Mon, Jun 27, 2016 at 04:00:43PM +0200, Peter Zijlstra wrote:
> On Mon, Jun 27, 2016 at 01:41:28PM -0400, Pan Xinhui wrote:
> > +++ b/include/linux/sched.h
> > @@ -3293,6 +3293,15 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
> >
> > #endif /* CONFIG_SMP */
> >
> > +#ifdef arch_vcpu_is_preempted
> > +static inline bool vcpu_is_preempted(int cpu)
> > +{
> > + return arch_vcpu_is_preempted(cpu);
> > +}
> > +#else
> > +#define vcpu_is_preempted(cpu) false
> > +#endif
>
> #ifndef vcpu_is_preempted
> #define vcpu_is_preempted(cpu) (false)
> #endif
>
> Is so much simpler...
>
> Also, please Cc the virt list so that other interested parties can
> comment, and maybe also the s390 folks.
The s390 implementation would be to simply use cpu_is_preempted() from
arch/s390/lib/spinlock.c.
It's nice that there will be a common code function for this!
next prev parent reply other threads:[~2016-06-28 7:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-27 17:41 [PATCH 0/3] implement vcpu preempted check Pan Xinhui
2016-06-27 17:41 ` [PATCH 1/3] kernel/sched: introduce vcpu preempted check interface Pan Xinhui
2016-06-27 14:00 ` Peter Zijlstra
2016-06-27 14:02 ` Peter Zijlstra
2016-06-28 3:14 ` xinhui
2016-06-28 7:00 ` Heiko Carstens [this message]
2016-06-28 9:47 ` xinhui
2016-06-27 14:05 ` Boqun Feng
2016-06-28 3:15 ` xinhui
2016-06-27 17:41 ` [PATCH 2/3] powerpc/spinlock: support vcpu preempted check Pan Xinhui
2016-06-27 14:17 ` Peter Zijlstra
2016-06-28 3:23 ` xinhui
2016-06-27 14:58 ` Boqun Feng
2016-06-28 3:39 ` xinhui
2016-06-28 5:03 ` Boqun Feng
2016-06-28 5:38 ` xinhui
2016-06-27 17:41 ` [PATCH 3/3] locking/osq: Drop the overload of osq_lock() Pan Xinhui
2016-06-27 14:21 ` Peter Zijlstra
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