linux-kernel - Re: Revert c5ad33184354260be6d05de57e46a5498692f6d6 "mm/swap.c: flush lru pvecs on compound page arrival" from stable tree? Was:[osstest-admin@...project.org: [Xen-devel] [linux-4.1 bisection] complete test-amd64-i386-qemut-rhel6hvm-amd]

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Message-ID: <20160718161805.GA18050@char.us.oracle.com>
Date:	Mon, 18 Jul 2016 12:18:05 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	"Odzioba, Lukasz" <lukasz.odzioba@...el.com>,
	ian.jackson@...rix.com
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"boris.ostrovsky@...cle.com" <boris.ostrovsky@...cle.com>,
	"david.vrabel@...rix.com" <david.vrabel@...rix.com>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: Revert c5ad33184354260be6d05de57e46a5498692f6d6 "mm/swap.c:
 flush lru pvecs on compound page arrival" from stable tree?
 Was:[osstest-admin@...project.org: [Xen-devel] [linux-4.1 bisection]
 complete test-amd64-i386-qemut-rhel6hvm-amd]

On Mon, Jul 18, 2016 at 03:48:03PM +0000, Odzioba, Lukasz wrote:
> On Monday, July 18, 2016 5:31 PM, Konrad Rzeszutek Wilk wrote:
> > We found that your patch in the automated Xen test-case ends up
> > OOMing the box when trying to install guests. This worked prior
> > to your patch.
> >
> > See serial log:
> > http://logs.test-lab.xenproject.org/osstest/logs/97597/test-amd64-i386-qemut-rhel6hvm-amd/serial-pinot0.log
> >
> > Would it be OK to revert this patch from the stable trees?
> 
> I think it is ok to revert that, but the source of a problem may be somewhere else.
> Is it the only problem with this patch, you see?

I believe so.

> By stable trees do you mean just 4.1 or all stable trees?

We have only tested 3.18 and 4.1. It may be that other stable trees
are affected.
> 
> Thanks,
> Lukas