linux-kernel - Re: apparent regressions from TLB range flushing page set

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Message-Id: <50349AB4020000780008A4B5@nat28.tlf.novell.com>
Date:	Wed, 22 Aug 2012 08:39:16 +0100
From:	"Jan Beulich" <jbeulich@...e.com>
To:	<alex.shi@...el.com>
Cc:	<konrad.wilk@...cle.com>, <linux-kernel@...r.kernel.org>,
	<hpa@...or.com>
Subject: Re: apparent regressions from TLB range flushing page set

>>> Alex Shi <alex.shi@...el.com> 08/22/12 5:24 AM >>>
>On 08/20/2012 10:12 PM, Jan Beulich wrote:
>I was thought you have 'Agreed' for xen part code. :)

I had agreed to it being done the right way, and I had pointed out the
problem once. I can't say for sure that I looked at the most recent rev
closely enough to spot the issue still being unfixed.

>> For one, while TLB_FLUSH_ALL gets passed as 'end' argument to
>> flush_tlb_others(), the Xen code was made to check its 'start'
>> parameter.
>
>Do you mean need the following change? --untested.

Yes. I'd question though whether for that special case it shouldn't be
start _and_ end to get passed the special value.

Jan

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