Re: Is: x86: mm: Fix vmalloc_fault oops during lazy MMU updates Was:Re: [PATCH] mm/x86: Flush lazy MMU when DEBUG_PAGEALLOC is set

From: Boris Ostrovsky
Date: Thu Feb 28 2013 - 11:27:51 EST


On 02/28/2013 11:22 AM, Borislav Petkov wrote:
On Thu, Feb 28, 2013 at 11:20:20AM -0500, Boris Ostrovsky wrote:
On 02/28/2013 11:10 AM, Borislav Petkov wrote:
On Thu, Feb 28, 2013 at 07:53:44AM -0800, H. Peter Anvin wrote:
At the very least we should have an early filter for the **COMMON!**
case that we are not on a PV platform.
... or, patch it out with the alternatives on baremetal, as Steven
suggested.

What was the suggestion exactly? I don't remember seeing that message.

-boris


I think making a check for paravirt_enabled() is safe enough. I'll
send a patch shortly.
Why not make it absolutely for free?


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