From: Julien Grall <julien.grall@linaro.org>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: xen-devel@lists.xenproject.org, tim@xen.org,
stefano.stabellini@citrix.com,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [PATCH v7 2/4] xen/arm: grant: Add another entry to map MFN 1:1 in dom0 p2m
Date: Tue, 20 May 2014 12:53:34 +0100 [thread overview]
Message-ID: <537B423E.6060708@linaro.org> (raw)
In-Reply-To: <1400585155.6946.2.camel@kazak.uk.xensource.com>
On 05/20/2014 12:25 PM, Ian Campbell wrote:
> On Tue, 2014-05-20 at 12:19 +0100, Julien Grall wrote:
>> FreeBSD is asking to write this buffer to the disk but from what I see
>> it mostly contains garbage (full of 0xc2).
>>
>> I can't find where this comes and wondering if you have any thoughts.
>
> 0xc2 is the value which Xen uses to scrub pages when debug=y (see
> xen/common/page_alloc.c:scrub_one_page).
I though about it, but I find strange that the guest is trying to write
non-modified page to the disk.
I will try to debug a bit more on it.
--
Julien Grall
next prev parent reply other threads:[~2014-05-20 11:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-15 14:16 [PATCH v7 0/4] IOMMU support for ARM Julien Grall
2014-05-15 14:16 ` [PATCH v7 1/4] xen/arm: p2m: Clean cache PT when the IOMMU doesn't support coherent walk Julien Grall
2014-05-15 15:20 ` Ian Campbell
2014-05-15 15:24 ` Julien Grall
2014-05-15 15:51 ` Ian Campbell
2014-05-15 16:05 ` Jan Beulich
2014-05-15 16:04 ` Jan Beulich
2014-05-15 17:06 ` Julien Grall
2014-05-16 10:00 ` Ian Campbell
2014-05-15 14:16 ` [PATCH v7 2/4] xen/arm: grant: Add another entry to map MFN 1:1 in dom0 p2m Julien Grall
2014-05-17 18:12 ` Julien Grall
2014-05-19 9:45 ` Ian Campbell
2014-05-19 14:20 ` Julien Grall
2014-05-20 7:30 ` Roger Pau Monné
2014-05-20 8:51 ` Ian Campbell
2014-05-20 11:19 ` Julien Grall
2014-05-20 11:25 ` Ian Campbell
2014-05-20 11:53 ` Julien Grall [this message]
2014-05-15 14:16 ` [PATCH v7 3/4] xen: iommu: Define PAGE_{SHIFT, SIZE, ALIGN, MASK)_64K Julien Grall
2014-05-15 14:16 ` [PATCH v7 4/4] drivers/passthrough: arm: Add support for SMMU drivers Julien Grall
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