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

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Message-ID: <20120905143350.GD5844@phenom.dumpdata.com>
Date:	Wed, 5 Sep 2012 10:33:50 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	"Ren, Yongjie" <yongjie.ren@...el.com>
Cc:	"Shi, Alex" <alex.shi@...el.com>, Jan Beulich <JBeulich@...e.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

On Wed, Sep 05, 2012 at 05:41:37AM +0000, Ren, Yongjie wrote:
> > -----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.

OK, applied for v3.6
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