From: Amit Shah <amit.shah@redhat.com>
To: Alexey Kardashevskiy <aik@ozlabs.ru>,
Juan Quintela <quintela@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
qemu-devel@nongnu.org,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>
Subject: Re: [Qemu-devel] [PATCH] migration: Increase default max_downtime from 30ms to 300ms
Date: Mon, 9 Jun 2014 10:52:28 +0530 [thread overview]
Message-ID: <20140609052228.GA25383@grmbl.mre> (raw)
In-Reply-To: <5391F0CE.5040304@ozlabs.ru>
On (Sat) 07 Jun 2014 [02:48:14], Alexey Kardashevskiy wrote:
> On 06/06/2014 10:50 PM, Amit Shah wrote:
> > On (Thu) 27 Mar 2014 [14:57:26], Alexey Kardashevskiy wrote:
> >> The existing timeout is 30ms which on 100MB/s (1Gbit) gives us
> >> 3MB/s rate maximum. If we put some load on the guest, it is easy to
> >> get page dirtying rate too big so live migration will never complete.
> >> In the case of libvirt that means that the guest will be stopped
> >> anyway after a timeout specified in the "virsh migrate" command and
> >> this normally generates even bigger delay.
> >>
> >> This changes max_downtime to 300ms which seems to be more
> >> reasonable value.
> >>
> >> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> >
> > Reviewed-by: Amit Shah <amit.shah@redhat.com>
>
> Cool, thanks!
>
> But what is next? The patch is > 2 months old and it is simple and
> everything but it did not make it to any tree so far :)
I'll pester Juan to get it in :-)
Amit
prev parent reply other threads:[~2014-06-09 5:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-27 3:57 [Qemu-devel] [PATCH] migration: Increase default max_downtime from 30ms to 300ms Alexey Kardashevskiy
2014-03-27 9:01 ` Markus Armbruster
[not found] ` <53494FD0.8020009@ozlabs.ru>
[not found] ` <53604D73.1040905@ozlabs.ru>
2014-05-05 9:17 ` Alexey Kardashevskiy
2014-05-05 11:20 ` Juan Quintela
2014-06-04 8:13 ` Alexey Kardashevskiy
2014-06-04 10:25 ` Juan Quintela
2014-06-04 10:26 ` Paolo Bonzini
2014-06-06 12:50 ` Amit Shah
2014-06-06 16:48 ` Alexey Kardashevskiy
2014-06-09 5:22 ` Amit Shah [this message]
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