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Re: [Xen-devel] [PATCH] x86, locking: Remove ticket (spin)lock implementation

From Paolo Bonzini <pbonzini@redhat.com>
Newsgroups linux.kernel
Subject Re: [Xen-devel] [PATCH] x86, locking: Remove ticket (spin)lock implementation
Date 2016-05-19 13:00 +0200
Message-ID <rAtQm-73x-23@gated-at.bofh.it> (permalink)
References <rAeHD-5LI-3@gated-at.bofh.it> <rAfaG-6av-25@gated-at.bofh.it> <rAfu1-6iT-17@gated-at.bofh.it>
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On 18/05/2016 21:34, Peter Zijlstra wrote:
>> I don't know of any enterprise distro that is shipping anything
>> > more modern than 4.1?
> RHEL 7			-- v3.10
> SLES 12			-- v3.12
> Debian Jessie		-- v3.16
> Ubuntu 16.04 LTS	-- v4.4
> 
> But waiting for the major enterprise distros (RHEL/SLES) would mean
> another decade or so before people start using it. We don't usually wait
> this long for anything.

We're looking at converting a few specific spinlocks to qspinlock in
RHEL, though we cannot convert all of them due to the spin_lock_t ABI.
It won't get into customer's hands for a while of course.

Thanks,

Paolo

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Thread

[PATCH] x86,locking: Remove ticket (spin)lock implementation Peter Zijlstra <peterz@infradead.org> - 2016-05-18 20:50 +0200
  Re: [Xen-devel] [PATCH] x86, locking: Remove ticket (spin)lock  implementation Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> - 2016-05-18 21:20 +0200
    Re: [Xen-devel] [PATCH] x86, locking: Remove ticket (spin)lock  implementation Peter Zijlstra <peterz@infradead.org> - 2016-05-18 21:40 +0200
      Re: [Xen-devel] [PATCH] x86, locking: Remove ticket (spin)lock  implementation Ingo Molnar <mingo@kernel.org> - 2016-05-19 09:20 +0200
      Re: [Xen-devel] [PATCH] x86, locking: Remove ticket (spin)lock  implementation Paolo Bonzini <pbonzini@redhat.com> - 2016-05-19 13:00 +0200
  Re: [PATCH] x86,locking: Remove ticket (spin)lock implementation David Vrabel <david.vrabel@citrix.com> - 2016-05-19 11:10 +0200

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