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

[Paolo Bonzini]

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