Re: [patch] x86: avoid unnecessary smp alternatives switch during suspend/resume

[Ben Gamari]

On Fri, 19 Nov 2010 16:09:24 -0800, Suresh Siddha <suresh.b.siddha@xxxxxxxxx> wrote:
> During suspend, we disable all the non boot cpus. And during resume we bring
> them all back again. So no need to do alternatives_smp_switch() in between.
> 
> This speeds up both suspend and resume paths.
> 
Do you have typical before/after values? Is the change on the order of
microseconds, hundreds of milliseconds, or somewhere in between? It
might be good to note this in the changelog.

- Ben
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