Re: [Xen-devel] [xen-unstable bisection] complete test-i386-i386-xl

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Ian Campbell
> Sent: 16 January 2012 10:22
> To: Ian Jackson; Paul Durrant
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Keir (Xen.org); Stefano Stabellini
> Subject: Re: [Xen-devel] [xen-unstable bisection] complete test-i386-i386-xl
> 
> On Sat, 2012-01-14 at 12:05 +0000, xen.org wrote:
> > branch xen-unstable
> > xen branch xen-unstable
> > job test-i386-i386-xl
> > test guest-localmigrate
> >
> > Tree: linux
> > git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
> > Tree: qemu git://xenbits.xen.org/staging/qemu-xen-unstable.git
> > Tree: xen http://xenbits.xen.org/staging/xen-unstable.hg
> >
> > *** Found and reproduced problem changeset ***
> >
> >   Bug is in tree:  xen http://xenbits.xen.org/staging/xen-unstable.hg
> >   Bug introduced:  3c4c5df2cd0e
> >   Bug not present: 92630d4b093e
> >
> >
> >   changeset:   24471:3c4c5df2cd0e
> >   user:        Paul Durrant <paul.durrant@xxxxxxxxxx>
> >   date:        Fri Dec 16 14:54:14 2011 +0000
> >
> >       tools: VM generation ID save/restore and migrate.
> >
> >       Add code to track the address of the VM generation ID buffer across a
> >       save/restore or migrate, and increment it as necessary.
> >       The address of the buffer is written into xenstore by hvmloader at
> >       boot time. It must be read from xenstore by the caller of
> >       xc_domain_save() and then written back again by the caller of
> >       xc_domain_restore().
> >
> >       Note that the changes to xc_save.c and xc_restore.c are merely
> >       sufficient for them to build.
> >
> >       Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> >       Committed-by: Ian Jackson <ian.jackson.citrix.com>
> 
> The logs show a guest kernel crash but I think this is a second order effect
> (which I'll investigate) related to xl not recovering from a failed migration 
> in
> a way that guest kernels actually like.
> 
> The original failure seems to be a PV migration failure. Paul can you look
> into that aspect please. Probably an imbalance for PV save/restore due to
> something not correctly gated on HVM on one side or the other.
> 

Yep, I'll check now.

  Paul

> Thanks,
> Ian.
> 
> >
> >
> >
> >
> > For bisection revision-tuple graph see:
> >
> > http://www.chiark.greenend.org.uk/~xensrcts/results/bisect.xen-unstabl
> > e.test-i386-i386-xl.guest-localmigrate.html
> > Revision IDs in each graph node refer, respectively, to the Trees above.
> >
> > ----------------------------------------
> > Searching for failure / basis pass:
> >  10700 fail [host=woodlouse] / 10649 ok.
> > Failure / basis pass flights: 10700 / 10649
> > Tree: linux
> > git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
> > Tree: qemu git://xenbits.xen.org/staging/qemu-xen-unstable.git
> > Tree: xen http://xenbits.xen.org/staging/xen-unstable.hg
> > Latest 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 6d8888519e3a Basis pass
> > 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 5b2676ac1321 Generating
> > revisions with ./adhoc-revtuple-generator
> > git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git#59b1ffe03
> > 9ce366305d48176b7fccce29ce729d3-
> 59b1ffe039ce366305d48176b7fccce29ce729
> > d3
> > git://xenbits.xen.org/staging/qemu-xen-
> unstable.git#bb36d632e4cabf4788
> > 2adff07a45c6702c4a5b30-bb36d632e4cabf47882adff07a45c6702c4a5b30
> > http://xenbits.xen.org/staging/xen-unstable.hg#5b2676ac1321-
> 6d8888519e
> > 3a pulling from ssh://xen@xxxxxxxxxxxxxxx/HG/staging/xen-unstable.hg
> > searching for changes
> > no changes found
> > pulling from ssh://xen@xxxxxxxxxxxxxxx/HG/staging/xen-unstable.hg
> > searching for changes
> > no changes found
> > Loaded 49 nodes in revision graph
> > Searching for test results:
> >  10697 [host=potato-beetle]
> >  10708 fail 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 db22b1aa11d3
> >  10689 [host=itch-mite]
> >  10698 [host=potato-beetle]
> >  10715 fail 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 3c4c5df2cd0e
> >  10709 pass 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 92630d4b093e
> >  10681 [host=potato-beetle]
> >  10645 [host=potato-beetle]
> >  10699 [host=itch-mite]
> >  10646 [host=moss-bug]
> >  10649 pass 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 5b2676ac1321
> >  10701 [host=itch-mite]
> >  10680 [host=lace-bug]
> >  10710 fail 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 1e3fa01b0c9e
> >  10702 [host=itch-mite]
> >  10703 [host=itch-mite]
> >  10711 fail 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 3c4c5df2cd0e
> >  10700 fail 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 6d8888519e3a
> >  10704 [host=itch-mite]
> >  10712 pass 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 92630d4b093e
> >  10705 pass 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 5b2676ac1321
> >  10706 fail 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 6d8888519e3a
> >  10713 fail 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 3c4c5df2cd0e
> >  10707 fail 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 32dd444700bd
> >  10714 pass 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 92630d4b093e Searching for
> > interesting versions  Result found: flight 10649 (pass), for basis
> > pass  Result found: flight 10700 (fail), for basis failure  Repro
> > found: flight 10705 (pass), for basis pass  Repro found: flight 10706
> > (fail), for basis failure
> >  0 revisions at 59b1ffe039ce366305d48176b7fccce29ce729d3
> > bb36d632e4cabf47882adff07a45c6702c4a5b30 92630d4b093e No revisions
> left to test, checking graph state.
> >  Result found: flight 10709 (pass), for last pass  Result found:
> > flight 10711 (fail), for first failure  Repro found: flight 10712
> > (pass), for last pass  Repro found: flight 10713 (fail), for first
> > failure  Repro found: flight 10714 (pass), for last pass  Repro found:
> > flight 10715 (fail), for first failure
> >
> > *** Found and reproduced problem changeset ***
> >
> >   Bug is in tree:  xen http://xenbits.xen.org/staging/xen-unstable.hg
> >   Bug introduced:  3c4c5df2cd0e
> >   Bug not present: 92630d4b093e
> >
> > pulling from ssh://xen@xxxxxxxxxxxxxxx/HG/staging/xen-unstable.hg
> > searching for changes
> > no changes found
> >
> >   changeset:   24471:3c4c5df2cd0e
> >   user:        Paul Durrant <paul.durrant@xxxxxxxxxx>
> >   date:        Fri Dec 16 14:54:14 2011 +0000
> >
> >       tools: VM generation ID save/restore and migrate.
> >
> >       Add code to track the address of the VM generation ID buffer across a
> >       save/restore or migrate, and increment it as necessary.
> >       The address of the buffer is written into xenstore by hvmloader at
> >       boot time. It must be read from xenstore by the caller of
> >       xc_domain_save() and then written back again by the caller of
> >       xc_domain_restore().
> >
> >       Note that the changes to xc_save.c and xc_restore.c are merely
> >       sufficient for them to build.
> >
> >       Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> >       Committed-by: Ian Jackson <ian.jackson.citrix.com>
> >
> >
> >
> > Revision graph left in /home/xc_osstest/results/bisect.xen-unstable.test-
> i386-i386-xl.guest-localmigrate.{dot,ps,png,html}.
> > ----------------------------------------
> > 10715: ALL FAIL
> >
> > flight 10715 xen-unstable real-bisect [real]
> > http://www.chiark.greenend.org.uk/~xensrcts/logs/10715/
> >
> >
> > jobs:
> >  test-i386-i386-xl                                            fail
> >
> >
> > ------------------------------------------------------------
> > sg-report-flight on woking.cam.xci-test.com
> > logs: /home/xc_osstest/logs
> > images: /home/xc_osstest/images
> >
> > Logs, config files, etc. are available at
> >     http://www.chiark.greenend.org.uk/~xensrcts/logs
> >
> > Test harness code can be found at
> >     http://xenbits.xensource.com/gitweb?p=osstest.git;a=summary
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> 

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