Re: [PATCH] mm: fix up a spurious page fault whenever it happens

From: H. Peter Anvin
Date: Thu May 23 2013 - 11:07:46 EST

On 05/23/2013 06:29 AM, Steven Rostedt wrote:
> On Thu, 2013-05-23 at 08:19 -0400, Rik van Riel wrote:
>> We can add a bit in the architecture bits that
>> we use to check against other CPU and system
>> errata, and conditionally flush the whole TLB
>> from __native_flush_tlb_single().
> If we find that some CPUs have issues and others do not, and we can
> determine this by checking the CPU type at run time, I would strongly
> suggest using the jump_label infrastructure to do the branches. I know
> this is early to suggest something like this, but I just wanted to put
> it in your head ;-)

We don't even need the jump_label infrastructure -- we have
static_cpu_has*() which actually predates jump_label although it uses
the same underlying ideas.


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