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From: Olaf Hering <olaf@aepfle.de>
To: xen-devel@lists.xen.org
Subject: error in xen/arch/x86/mm.c:get_page during migration
Date: Thu, 21 Feb 2013 15:48:41 +0100	[thread overview]
Message-ID: <20130221144841.GB23819@aepfle.de> (raw)


While doing "while xm migrate --live domU localhost;do sleep 2;done" I
see many errors from get_page:

...
(XEN) HVM56 restore: TSC_ADJUST 0
(XEN) HVM56 restore: TSC_ADJUST 1
(XEN) mm.c:1982:d0 Error pfn 41a863: rd=ffff83036ffef000, od=0000000000000000, caf=180000000000000, taf=7400000000000001
(XEN) mm.c:1982:d0 Error pfn 41be1c: rd=ffff83036ffef000, od=0000000000000000, caf=180000000000000, taf=7400000000000001
(XEN) mm.c:1982:d0 Error pfn 41a862: rd=ffff83036ffef000, od=0000000000000000, caf=180000000000000, taf=7400000000000001
(XEN) mm.c:1982:d0 Error pfn 41b90f: rd=ffff83036ffef000, od=0000000000000000, caf=180000000000000, taf=7400000000000001
(XEN) mm.c:1982:d0 Error pfn 41b49a: rd=ffff83036ffef000, od=0000000000000000, caf=180000000000000, taf=7400000000000001
(XEN) mm.c:1982:d0 Error pfn 41b48d: rd=ffff83036ffef000, od=0000000000000000, caf=180000000000000, taf=7400000000000001
(XEN) irq.c:375: Dom56 callback via changed to Direct Vector 0xf3
(XEN) HVM56 save: CPU
...

The pfn number and the amount of pfn differs during iterations, but in the end
only these two variants appear:

# xm dmesg | grep -w mm | cut -d : -f 4- | sort | uniq -c | sort
     22  rd=ffff83036ffef000, od=0000000000000000, caf=180000000000000, taf=7400000000000001
     46  rd=ffff83036ffef000, od=0000000000000000, caf=180000000000000, taf=0000000000000001


It does not seem to cause issues other than the log output.
Does it indiciate a real bug?

Olaf

             reply	other threads:[~2013-02-21 14:48 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-21 14:48 Olaf Hering [this message]
2013-02-21 16:42 ` error in xen/arch/x86/mm.c:get_page during migration Jan Beulich
2013-02-21 17:31   ` Olaf Hering
2013-02-22  7:42     ` Jan Beulich
2013-02-22  8:57       ` Olaf Hering
2013-02-22 14:01     ` Jan Beulich
2013-02-22 20:07       ` Olaf Hering
2013-02-25  9:34         ` Jan Beulich
     [not found] <mailman.24679.1361784883.1399.xen-devel@lists.xen.org>
2013-02-25 14:52 ` Andres Lagar-Cavilla
2013-02-28 11:56   ` Tim Deegan
2013-02-28 13:12     ` Olaf Hering
2013-02-28 14:06     ` Jan Beulich
2013-02-28 14:13       ` Tim Deegan
2013-02-28 14:59       ` Andres Lagar-Cavilla
2013-02-28 15:15         ` Jan Beulich

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