From mboxrd@z Thu Jan  1 00:00:00 1970
From: Julien Grall <julien.grall@linaro.org>
Subject: Re: [PATCH RFC] xen: arm: use uncached foreign mappings
 when building guests
Date: Thu, 19 Dec 2013 04:26:52 +0000
Message-ID: <52B2758C.70208@linaro.org>
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To: Ian Campbell <Ian.Campbell@citrix.com>, xen-devel <xen-devel@lists.xen.org>
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>, Julien Grall <julien.grall@citrix.com>, Stefano.Stabellini@citrix.com, David Vrabel <david.vrabel@citrix.com>, Boris Ostrovsky <boris.ostrovsky@oracle.com>
List-Id: xen-devel@lists.xenproject.org



On 12/18/2013 05:28 PM, Ian Campbell wrote:
>
> I've tried this on arm64 and it seems ok, Julien, please can you give
> this a go in your midway test case which exposes this issue.
>

It's even worst :/. Crash every 2 times instead of 5 times.

Did you try to create/destroy numerous time? I have a script shell for 
this purpose:
#! /bin/bash

for i in `seq 1 20000`; do
     echo "Boot dom $i";
     xl create ~/dom1.xl
     sleep 5;
     xl destroy test;
     if [ $? -ne 0 ]; then
         exit
     fi
done

To be sure that the guest crash "correctly", you will need to revert the 
commit 91082d7b877cbb40de73199ba3f769d98be94215 "xen: arm: inject 
unhandled instruction and data aborts to the guest.".
Otherwise the data/prefetch fault will be redirected to the guest and 
hide for the script shell.

Cheers,

-- 
Julien Grall