From: Olaf Hering <olaf@aepfle.de>
To: Jan Beulich <jbeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <iwj@xenproject.org>, Wei Liu <wl@xen.org>,
Xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH] tools/libxenguest: Fix migration's debug option
Date: Mon, 5 Jul 2021 10:02:28 +0200 [thread overview]
Message-ID: <20210705100228.4947ed4e.olaf@aepfle.de> (raw)
In-Reply-To: <06968742-355f-ad37-0681-e51eea256414@suse.com>
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Am Mon, 5 Jul 2021 09:57:21 +0200
schrieb Jan Beulich <jbeulich@suse.com>:
> What is "the grant problem" referring to here? Neither anything above
> nor the offending original commit has any reference to grants, or a
> problem with them.
When the guest is paused during final transit, the backends will continue to write into domU memory. As a result the final additional iteration to verify memory on both sides will always see errors. The code has no way to know for which pfn such mismatches in page content can safely be ignored.
Olaf
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next prev parent reply other threads:[~2021-07-05 8:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-02 19:03 [PATCH] tools/libxenguest: Fix migration's debug option Andrew Cooper
2021-07-05 7:53 ` Olaf Hering
2021-07-05 7:57 ` Jan Beulich
2021-07-05 8:02 ` Olaf Hering [this message]
2021-07-05 8:23 ` Jan Beulich
2021-07-05 8:32 ` Olaf Hering
2021-07-05 9:19 ` Jan Beulich
2021-07-05 9:25 ` Olaf Hering
2021-07-05 9:31 ` Jan Beulich
2021-07-05 10:06 ` Andrew Cooper
2021-07-05 10:36 ` Jan Beulich
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