linux-kernel - RE: [PATCH] xen: fix logical error in tlb flushing

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Date:	Wed, 5 Sep 2012 05:41:37 +0000
From:	"Ren, Yongjie" <yongjie.ren@...el.com>
To:	"Shi, Alex" <alex.shi@...el.com>, Jan Beulich <JBeulich@...e.com>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"hpa@...or.com" <hpa@...or.com>
Subject: RE: [PATCH] xen: fix logical error in tlb flushing

> -----Original Message-----
> From: Shi, Alex
> Sent: Wednesday, September 05, 2012 1:35 PM
> To: Jan Beulich
> Cc: Konrad Rzeszutek Wilk; tglx@...utronix.de; mingo@...hat.com;
> linux-kernel@...r.kernel.org; hpa@...or.com; Ren, Yongjie
> Subject: Re: [PATCH] xen: fix logical error in tlb flushing
> 
> On 08/25/2012 03:45 AM, Jan Beulich wrote:
> 
> >>>> On 24.08.12 at 20:17, Konrad Rzeszutek Wilk
> <konrad.wilk@...cle.com> wrote:
> >> On Fri, Aug 24, 2012 at 04:16:39PM +0100, Jan Beulich wrote:
> >>>>>> On 24.08.12 at 10:55, Alex Shi <alex.shi@...el.com> wrote:
> >>>> While TLB_FLUSH_ALL gets passed as 'end' argument to
> >>>> flush_tlb_others(), the Xen code was made to check its 'start'
> >>>> parameter. That may give a incorrect op.cmd to
> MMUEXT_INVLPG_MULTI
> >>>> instead of MMUEXT_TLB_FLUSH_MULTI. Then it causes some page
> can not
> >>>> be flushed from TLB.
> >>>>
> >>>> This patch fixed this issue.
> >>>>
> >>>> Reported-by: Jan Beulich <jbeulich@...e.com>
> >>>> Signed-off-by: Alex Shi <alex.shi@...el.com>
> >>>
> >>> Acked-by: Jan Beulich <jbeulich@...e.com>
> 
Tested-by: Yongjie Ren <yongjie.ren@...el.com>

> 
> CC to Yongjie,
> Could you like to test this patch on PV guest
> 
Xen Dom0 and a PV guest kernel with this patch can boot up correctly.

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