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: <22416.50164.521430.604730@mariner.uk.xensource.com>
Date:	Thu, 21 Jul 2016 13:45:40 +0100
From:	Ian Jackson <ian.jackson@...citrix.com>
To:	"stable@...r.kernel.org" <stable@...r.kernel.org>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"Odzioba, Lukasz" <lukasz.odzioba@...el.com>,
	"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>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	Sebastian Gottschall <s.gottschall@...wrt.com>
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]

I see that linux-4.1.y is still at 5880876e9469 which has the serious
bug introduced by the backport c5ad33184354 "mm/swap.c: flush lru
pvecs on compound page arrival".

The analogous problem is also still affecting at least linux-3.18.y.

Is there some problem with reverting this patch in the stable
branches ?

Thanks,
Ian.