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From: John Snow <jsnow@redhat.com>
To: qemu-devel <qemu-devel@nongnu.org>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Subject: [Qemu-devel] Debugging Migration
Date: Tue, 6 Oct 2015 14:46:42 -0400	[thread overview]
Message-ID: <56141712.1010202@redhat.com> (raw)

Is there a convenient way of "pausing" or stalling a live migration to
allow methodical testing of race conditions?

I'd like to instrument something along the lines of:

(1) Live migration begins.
(2) migration is artificially halted or paused, but QEMU is allowed to run.
(3) Some additional qtest/QMP commands are received and processed.
(4) migration is allowed to resume.

Does anyone have perhaps even test patches to instrument this sort of
thing, or is it up to detective john to add it if he wants it?

Thanks,
--js

             reply	other threads:[~2015-10-06 18:46 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-06 18:46 John Snow [this message]
2015-10-06 19:00 ` [Qemu-devel] Debugging Migration Dr. David Alan Gilbert
2015-10-06 22:40 ` Denis V. Lunev
2015-10-06 23:02   ` John Snow
2015-10-07  6:20     ` [Qemu-devel] [RFC 0/8] QEMUFile-way to gather VM's memory statistics Denis V. Lunev
2015-10-07  6:20       ` [Qemu-devel] [PATCH 1/8] migration: fix expected_downtime Denis V. Lunev
2015-10-07  6:20       ` [Qemu-devel] [PATCH 2/8] qemu-file: new hook in qemu-file Denis V. Lunev
2015-10-07  6:20       ` [Qemu-devel] [PATCH 3/8] migration: add new capability test-only Denis V. Lunev
2015-10-07 15:05         ` Eric Blake
2015-10-08 14:54           ` Denis V. Lunev
2015-10-09 15:19             ` Dr. David Alan Gilbert
2015-10-07  6:20       ` [Qemu-devel] [PATCH 4/8] migration: add function for reseting migration bitmap Denis V. Lunev
2015-10-07  6:20       ` [Qemu-devel] [PATCH 5/8] migration: add draft of new transport Denis V. Lunev
2015-10-07  6:20       ` [Qemu-devel] [PATCH 6/8] migration: implementation of hook_ram_sync Denis V. Lunev
2015-10-07  9:44         ` Paolo Bonzini
2015-10-08 16:51           ` Denis V. Lunev
2015-10-07  9:44         ` Paolo Bonzini
2015-10-08 16:39           ` Denis V. Lunev
2015-10-07 14:03         ` Dr. David Alan Gilbert
2015-10-07  6:20       ` [Qemu-devel] [PATCH 7/8] migration: new migration test mode Denis V. Lunev
2015-10-07 13:56         ` Dr. David Alan Gilbert
2015-10-07 15:08           ` Eric Blake
2015-10-08 17:01             ` Denis V. Lunev
2015-10-08 17:05               ` Dr. David Alan Gilbert
2015-10-08 17:05           ` Denis V. Lunev
2015-10-08 18:57             ` Dr. David Alan Gilbert
2015-10-07  6:20       ` [Qemu-devel] [PATCH 8/8] migration: add output of gathered statistics Denis V. Lunev
2015-10-07 14:19       ` [Qemu-devel] [RFC 0/8] QEMUFile-way to gather VM's memory statistics Dr. David Alan Gilbert
2015-10-07  6:38     ` [Qemu-devel] Debugging Migration Denis V. Lunev

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