Re: invalidate caches before going into suspend
From: Linus Torvalds
Date: Wed Aug 13 2008 - 13:18:26 EST
On Wed, 13 Aug 2008, Mark Langsdorf wrote:
>
> I don't think it's necessary. I can submit a delta patch later if you
> think it's really necessary.
Why not at least move it to after the local_irq_disable()?
That local_irq_disable() will do tons of writes if you have
lockdep enabled, it calls trace_hardirqs_off() etc. Maybe they don't end
up ever mattering, but wouldn't it make much more sense to just move the
wbinvd down to just before the
while (1)
halt();
which is also likely to make sure that the compiler won't do anything at
all because everything is dead at that point with no function calls etc
happening.
Linus
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