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Groups > linux.kernel > #1262966
| From | Linus Torvalds <torvalds@linux-foundation.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [patch 02/14] x86/apic: Implement single target IPI function for x2apic_cluster |
| Date | 2015-11-05 08:10 +0100 |
| Message-ID | <qrmQh-3q6-13@gated-at.bofh.it> (permalink) |
| References | <qrfc5-6Fb-3@gated-at.bofh.it> <qrflN-6Yk-33@gated-at.bofh.it> <qrmQh-3q6-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Nov 4, 2015 at 10:38 PM, Ingo Molnar <mingo@kernel.org> wrote:
>
> but in the above sequence I think we can do even better: we don't need the
> local_irq_save()/restore() I think.
Right. Thomas added that one to my patch.
I don't think he realized just *how* trivial sending a single IPI is
with the x2apic, and just how horribly nasty the mask case is in
comparison (and how nasty it is that we historically turn a the single
ipi into a mask).
Linus
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[patch 00/14] x86/apic: Implement single target IPI callback Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
[patch 06/14] x86/apic: Remove pointless indirections from bigsmp_apic Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
[tip:x86/apic] x86/apic: Remove pointless indirections from bigsmp_apic tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
[patch 01/14] x86/apic: Add a single-target IPI function to the apic Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
[tip:x86/apic] x86/apic: Add a single-target IPI function to the apic tip-bot for Linus Torvalds <tipbot@zytor.com> - 2015-11-05 15:50 +0100
[patch 05/14] x86/apic: Wire up single IPI for apic_physflat Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
[tip:x86/apic] x86/apic: Wire up single IPI for apic_physflat tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
[patch 04/14] x86/apic: Remove pointless indirections from apic_physflat Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
[tip:x86/apic] x86/apic: Remove pointless indirections from apic_physflat tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
[patch 08/14] x86/apic: Implement single IPI for x2apic_phys Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
[tip:x86/apic] x86/apic: Implement single IPI for x2apic_phys tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
[patch 02/14] x86/apic: Implement single target IPI function for x2apic_cluster Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
Re: [patch 02/14] x86/apic: Implement single target IPI function for x2apic_cluster Linus Torvalds <torvalds@linux-foundation.org> - 2015-11-05 08:10 +0100
Re: [patch 02/14] x86/apic: Implement single target IPI function for x2apic_cluster Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 09:10 +0100
Re: [patch 02/14] x86/apic: Implement single target IPI function for x2apic_cluster Ingo Molnar <mingo@kernel.org> - 2015-11-05 08:10 +0100
[tip:x86/apic] x86/apic: Implement single target IPI function for x2apic_cluster tip-bot for Linus Torvalds <tipbot@zytor.com> - 2015-11-05 15:50 +0100
[patch 10/14] x86/apic: Implement single IPI for apic_noop Thomas Gleixner <tglx@linutronix.de> - 2015-11-05 00:10 +0100
[tip:x86/apic] x86/apic: Implement single IPI for apic_noop tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2015-11-05 15:50 +0100
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