Re: [Xen-devel] [PATCH v2 1/2] x86/mm: fix a potential race condition in map_pages_to_xen().

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 10.11.17 at 15:05, <yu.c.zhang@xxxxxxxxxxxxxxx> wrote:
> On 11/10/2017 5:49 PM, Jan Beulich wrote:
>> I'm not certain this is important enough a fix to consider for 4.10,
>> and you seem to think it's good enough if this gets applied only
>> after the tree would be branched, as you didn't Cc Julien. Please
>> indicate if you actually simply weren't aware, and you indeed
>> there's an important aspect to this that I'm overlooking.
> 
> Well, at first I have not expected this to be accepted for 4.10. But 
> since we have
> met this issue in practice, when running a graphic application which 
> consumes
> memory intensively in dom0, I think it also makes sense if we can fix it 
> in xen's
> release as early as possible. Do you think this is a reasonable 
> requirement? :-)

You'd need to provide further details for us to understand the
scenario. It obviously depends on whether you have other
patches to Xen which actually trigger this. If the problem can
be triggered from outside of a vanilla upstream Xen, then yes,
I think I would favor the fixes being included.

Jan


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