Re: [PATCH] xen/spinlock: Don't enable them unconditionally.
From: David Vrabel
Date: Mon Apr 07 2014 - 13:14:48 EST
On 04/04/14 19:48, konrad@xxxxxxxxxx wrote:
> From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> The git commit a945928ea2709bc0e8e8165d33aed855a0110279
> ('xen: Do not enable spinlocks before jump_label_init() has executed')
> was added to deal with the jump machinery. Earlier the code
> that turned on the jump label was only called by Xen specific
> functions. But now that it had been moved to the initcall machinery
> it gets called on Xen, KVM, and baremetal - ouch!. And the detection
> machinery to only call it on Xen wasn't remembered in the heat
> of merge window excitement.
> This means that the slowpath is enabled on baremetal while it should
> not be.
Applied to devel/for-linus-3.15.
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