linux-kernel - Re: [Qemu-devel] [PATCH 19/23] userfaultfd: activate syscall

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Date:	Tue, 08 Sep 2015 20:40:21 +1000
From:	Michael Ellerman <mpe@...erman.id.au>
To:	bharata@...ux.vnet.ibm.com
Cc:	kvm@...r.kernel.org, qemu-devel@...gnu.org,
	Sanidhya Kashyap <sanidhya.gatech@...il.com>,
	linux-mm@...ck.org, Andrea Arcangeli <aarcange@...hat.com>,
	zhang.zhanghailiang@...wei.com,
	Pavel Emelyanov <xemul@...allels.com>,
	Hugh Dickins <hughd@...gle.com>, Mel Gorman <mgorman@...e.de>,
	"Huangpeng (Peter)" <peter.huangpeng@...wei.com>,
	"Dr. David Alan Gilbert" <dgilbert@...hat.com>,
	Andres Lagar-Cavilla <andreslc@...gle.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Dave Hansen <dave.hansen@...el.com>, linux-api@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Andy Lutomirski <luto@...capital.net>,
	Johannes Weiner <hannes@...xchg.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Feiner <pfeiner@...gle.com>
Subject: Re: [Qemu-devel] [PATCH 19/23] userfaultfd: activate syscall

On Tue, 2015-09-08 at 17:14 +1000, Michael Ellerman wrote:
> On Tue, 2015-09-08 at 12:09 +0530, Bharata B Rao wrote:
> > On Tue, Sep 08, 2015 at 04:08:06PM +1000, Michael Ellerman wrote:
> > > Hmm, not for me. See below.
> > > 
> > > What setup were you testing on Bharata?
> > 
> > I was on commit a94572f5799dd of userfault21 branch in Andrea's tree
> > git://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git
> > 
> > #uname -a
> > Linux 4.1.0-rc8+ #1 SMP Tue Aug 11 11:33:50 IST 2015 ppc64le ppc64le ppc64le GNU/Linux
> > 
> > In fact I had successfully done postcopy migration of sPAPR guest with
> > this setup.
> 
> OK, do you mind testing mainline with the same setup to see if the selftest
> passes.

Ah, I just tried it on big endian and it works. So it seems to not work on
little endian for some reason, /probably/ a test case bug?

cheers


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