Re: [PATCH](retry 4) invalidate caches before going into suspend

[Ingo Molnar]

* Mark Langsdorf <mark.langsdorf@xxxxxxx> wrote:

> When a CPU core is shut down, all of its caches need to be flushed to 
> prevent stale data from causing errors if the core is resumed. Current 
> Linux suspend code performs an assignment after the flush, which can 
> add dirty data back to the cache.  On some AMD platforms, additional 
> speculative reads have caused crashes on resume because of this dirty 
> data.
>  
> Relocate the cache flush to be the very last thing done before 
> halting.  Tie into an assembly line so the compile will not reorder 
> it.  Add some documentation explaining what is going on and why we're 
> doing this.
> 
> Signed-off-by: Mark Langsdorf <mark.langsdorf@xxxxxxx>
> Acked-by: Mark Borden <mark.borden@xxxxxxx>
> Acked-by: Michael Hohmuth <michael.hohmuth@xxxxxxx>

applied to tip/x86/urgent - thanks Mark.

	Ingo
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