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Groups > linux.kernel > #1727625
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock() |
| Date | 2017-09-06 18:10 +0200 |
| Message-ID | <umL3P-49l-5@gated-at.bofh.it> (permalink) |
| References | <umKr7-3Dj-11@gated-at.bofh.it> <umKr7-3Dj-9@gated-at.bofh.it> <umKKt-3MF-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Sep 06, 2017 at 11:49:49AM -0400, Waiman Long wrote:
> > #define virt_spin_lock virt_spin_lock
> > static inline bool virt_spin_lock(struct qspinlock *lock)
> > {
> > + if (!static_branch_likely(&virt_spin_lock_key))
> > + return false;
> > if (!static_cpu_has(X86_FEATURE_HYPERVISOR))
> > return false;
> >
Now native has two NOPs instead of one. Can't we merge these two static
branches?
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[PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock() Juergen Gross <jgross@suse.com> - 2017-09-06 17:30 +0200
Re: [PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock() Waiman Long <longman@redhat.com> - 2017-09-06 17:50 +0200
Re: [PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock() Peter Zijlstra <peterz@infradead.org> - 2017-09-06 18:10 +0200
Re: [PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock() Waiman Long <longman@redhat.com> - 2017-09-06 18:20 +0200
Re: [PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock() Juergen Gross <jgross@suse.com> - 2017-09-06 20:00 +0200
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