From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: Alexey Perevalov <a.perevalov@samsung.com>
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
"Juan Quintela" <quintela@redhat.com>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Peter Xu" <peterx@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Laurent Vivier" <lvivier@redhat.com>,
"QEMU Developers" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PULL 00/27] Migration pull
Date: Mon, 22 Jan 2018 19:52:21 +0000 [thread overview]
Message-ID: <20180122195221.GC2628@work-vm> (raw)
In-Reply-To: <96f66b1f-2248-04ed-aabb-0cac1342b0cc@samsung.com>
* Alexey Perevalov (a.perevalov@samsung.com) wrote:
> On 01/22/2018 07:26 PM, Peter Maydell wrote:
> > On 22 January 2018 at 16:25, Alexey Perevalov <a.perevalov@samsung.com> wrote:
> > > I want to keep 64bit atomic operations in migration.
> > Sorry, you can't -- some 32 bit CPUs simply do not provide these
> > operations. You need to rework your design to not require this.
> I would like to ask David,
> how do you think is it normal to use just one half of now_ms (int64_t), one
> half
> of 64 bit value should represent 1200 hours and probably it's enough to keep
> time
> difference.
Yes you could use an offset (start of migration?) - if the postcopy
phase is taking more than that long we're probably in trouble.
But remember your '0' value is special.
Dave
> >
> > thanks
> > -- PMM
> >
> >
> >
>
> --
> Best regards,
> Alexey Perevalov
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
next prev parent reply other threads:[~2018-01-22 19:52 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-15 11:52 [Qemu-devel] [PULL 00/27] Migration pull Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 01/27] migration: Use proper types in json Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 02/27] migration: print features as on off Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 03/27] migration: free addr in the same function that we created it Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 04/27] docs: Convert migration.txt to rst Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 05/27] migration: free result string Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 06/27] migration: fix analyze-migration.py script with radix table Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 07/27] migration: introduce postcopy-blocktime capability Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 08/27] migration: add postcopy blocktime ctx into MigrationIncomingState Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 09/27] migration: calculate vCPU blocktime on dst side Juan Quintela
2018-01-15 20:19 ` Max Reitz
2018-01-16 13:19 ` Juan Quintela
2018-01-16 17:43 ` Dr. David Alan Gilbert
2018-01-16 19:22 ` Alexey Perevalov
2018-01-15 11:52 ` [Qemu-devel] [PULL 10/27] migration: postcopy_blocktime documentation Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 11/27] migration: add blocktime calculation into migration-test Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 12/27] migration: add postcopy total blocktime into query-migrate Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 13/27] migration: Guard ram_bytes_remaining against early call Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 14/27] migration: finalize current_migration object Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 15/27] migration: assert colo instead of check Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 16/27] migration: qemu_savevm_state_cleanup() in cleanup Juan Quintela
2018-01-15 11:52 ` [Qemu-devel] [PULL 17/27] migration: remove "enable_colo" var Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 18/27] migration: split use of MigrationState.total_time Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 19/27] migration: move vm_old_running into global state Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 20/27] migration: introduce downtime_start Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 21/27] migration: introduce migrate_calculate_complete Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 22/27] migration: use switch at the end of migration Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 23/27] migration: cleanup stats update into function Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 24/27] migration: major cleanup for migrate iterations Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 25/27] migration: put the finish part into a new function Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 26/27] migration: remove some block_cleanup_parameters() Juan Quintela
2018-01-15 11:53 ` [Qemu-devel] [PULL 27/27] migration: remove notify in fd_error Juan Quintela
2018-01-15 16:14 ` [Qemu-devel] [PULL 00/27] Migration pull Peter Maydell
2018-01-19 16:27 ` Philippe Mathieu-Daudé
2018-01-19 16:34 ` Peter Maydell
2018-01-19 17:00 ` Philippe Mathieu-Daudé
2018-01-19 16:43 ` Alexey Perevalov
2018-01-19 17:01 ` Peter Maydell
2018-01-20 23:36 ` Juan Quintela
2018-01-21 3:19 ` Philippe Mathieu-Daudé
2018-01-22 10:03 ` Peter Maydell
2018-01-22 16:25 ` Alexey Perevalov
2018-01-22 16:26 ` Peter Maydell
2018-01-22 18:25 ` Alexey Perevalov
2018-01-22 19:52 ` Dr. David Alan Gilbert [this message]
2018-01-22 18:38 ` Alex Bennée
2018-01-22 12:22 ` Peter Maydell
2018-01-22 12:38 ` Dr. David Alan Gilbert
2018-01-22 13:38 ` Peter Maydell
2018-01-23 10:09 ` Peter Maydell
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