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From: Michael Ellerman <mpe@ellerman.id.au>
Date: Tue, 08 Sep 2015 20:40:21 +1000
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Subject: Re: [Qemu-devel] [PATCH 19/23] userfaultfd: activate syscall
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To: bharata@linux.vnet.ibm.com
Cc: kvm@vger.kernel.org, qemu-devel@nongnu.org, Sanidhya Kashyap <sanidhya.gatech@gmail.com>, linux-mm@kvack.org, Andrea Arcangeli <aarcange@redhat.com>, zhang.zhanghailiang@huawei.com, Pavel Emelyanov <xemul@parallels.com>, Hugh Dickins <hughd@google.com>, Mel Gorman <mgorman@suse.de>, "Huangpeng (Peter)" <peter.huangpeng@huawei.com>, "Dr.
	David Alan Gilbert" <dgilbert@redhat.com>, Andres Lagar-Cavilla <andreslc@google.com>, "Kirill A. Shutemov" <kirill@shutemov.name>, Dave Hansen <dave.hansen@intel.com>, linux-api@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Andy Lutomirski <luto@amacapital.net>, Johannes Weiner <hannes@cmpxchg.org>, Paolo Bonzini <pbonzini@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org>, Peter Feiner <pfeiner@google.com>

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