From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael R. Hines" <mrhines@linux.vnet.ibm.com>
Cc: aliguori@us.ibm.com, mst@redhat.com, qemu-devel@nongnu.org,
owasserm@redhat.com, abali@us.ibm.com, mrhines@us.ibm.com,
gokul@us.ibm.com
Subject: Re: [Qemu-devel] [RFC PATCH RDMA support v4: 08/10] introduce QEMUFileRDMA
Date: Tue, 19 Mar 2013 19:40:55 +0100 [thread overview]
Message-ID: <5148B137.4070300@redhat.com> (raw)
In-Reply-To: <5148AE2F.2030206@linux.vnet.ibm.com>
Il 19/03/2013 19:27, Michael R. Hines ha scritto:
>>>
>> That however gives me an idea... Instead of the full drain at the end
>> of an iteration, does it make sense to do a "partial" drain at every
>> chunk full, so that you don't have > N bytes pending and the downtime is
>> correspondingly limited?
>
>
> Sure, you could do that, but it seems overly complex just to avoid
> a single flush() call at the end of each iteration, right?
Would it really be that complex? Not having an extra QEMUFile op
perhaps balances that complexity (and the complexity remains hidden in
rdma.c, which is an advantage).
You could alternatively drain every N megabytes sent, or something like
that. But a partial drain would help obeying the maximum downtime
limitations.
Paolo
next prev parent reply other threads:[~2013-03-19 18:41 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-18 3:18 [Qemu-devel] [RFC PATCH RDMA support v4: 00/10] cleaner ramblocks and documentation mrhines
2013-03-18 3:18 ` [Qemu-devel] [RFC PATCH RDMA support v4: 01/10] ./configure --enable-rdma mrhines
2013-03-18 3:18 ` [Qemu-devel] [RFC PATCH RDMA support v4: 02/10] check for CONFIG_RDMA mrhines
2013-03-18 3:18 ` [Qemu-devel] [RFC PATCH RDMA support v4: 03/10] more verbose documentation of the RDMA transport mrhines
2013-03-18 10:40 ` Michael S. Tsirkin
2013-03-18 20:24 ` Michael R. Hines
2013-03-18 21:26 ` Michael S. Tsirkin
2013-03-18 23:23 ` Michael R. Hines
2013-03-19 8:19 ` Michael S. Tsirkin
2013-03-19 13:21 ` Michael R. Hines
2013-03-19 15:08 ` Michael R. Hines
2013-03-19 15:16 ` Michael S. Tsirkin
2013-03-19 15:32 ` Michael R. Hines
2013-03-19 15:36 ` Michael S. Tsirkin
2013-03-19 17:09 ` Michael R. Hines
2013-03-19 17:14 ` Paolo Bonzini
2013-03-19 17:23 ` Michael S. Tsirkin
2013-03-19 17:40 ` Michael R. Hines
2013-03-19 17:52 ` Paolo Bonzini
2013-03-19 18:04 ` Michael R. Hines
2013-03-20 13:07 ` Michael S. Tsirkin
2013-03-20 15:15 ` Michael R. Hines
2013-03-20 15:22 ` Michael R. Hines
2013-03-20 15:55 ` Michael S. Tsirkin
2013-03-20 16:08 ` Michael R. Hines
2013-03-20 19:06 ` Michael S. Tsirkin
2013-03-20 20:20 ` Michael R. Hines
2013-03-20 20:31 ` Michael S. Tsirkin
2013-03-20 20:39 ` Michael R. Hines
2013-03-20 20:46 ` Michael S. Tsirkin
2013-03-20 20:56 ` Michael R. Hines
2013-03-21 5:20 ` Michael S. Tsirkin
2013-03-20 20:24 ` Michael R. Hines
2013-03-20 20:37 ` Michael S. Tsirkin
2013-03-20 20:45 ` Michael R. Hines
2013-03-20 20:52 ` Michael S. Tsirkin
2013-03-19 17:49 ` Michael R. Hines
2013-03-21 6:11 ` Michael S. Tsirkin
2013-03-21 15:22 ` Michael R. Hines
2013-04-05 20:45 ` Michael R. Hines
2013-04-05 20:46 ` Michael R. Hines
2013-03-18 3:18 ` [Qemu-devel] [RFC PATCH RDMA support v4: 04/10] iterators for getting the RAMBlocks mrhines
2013-03-18 8:48 ` Paolo Bonzini
2013-03-18 20:25 ` Michael R. Hines
2013-03-18 3:18 ` [Qemu-devel] [RFC PATCH RDMA support v4: 05/10] reuse function for parsing the QMP 'migrate' string mrhines
2013-03-18 3:18 ` [Qemu-devel] [RFC PATCH RDMA support v4: 06/10] core RDMA migration code (rdma.c) mrhines
2013-03-18 3:19 ` [Qemu-devel] [RFC PATCH RDMA support v4: 07/10] connection-establishment for RDMA mrhines
2013-03-18 8:56 ` Paolo Bonzini
2013-03-18 20:26 ` Michael R. Hines
2013-03-18 3:19 ` [Qemu-devel] [RFC PATCH RDMA support v4: 08/10] introduce QEMUFileRDMA mrhines
2013-03-18 9:09 ` Paolo Bonzini
2013-03-18 20:33 ` Michael R. Hines
2013-03-19 9:18 ` Paolo Bonzini
2013-03-19 13:12 ` Michael R. Hines
2013-03-19 13:25 ` Paolo Bonzini
2013-03-19 13:40 ` Michael R. Hines
2013-03-19 13:45 ` Paolo Bonzini
2013-03-19 14:10 ` Michael R. Hines
2013-03-19 14:22 ` Paolo Bonzini
2013-03-19 15:02 ` [Qemu-devel] [Bug]? (RDMA-related) ballooned memory not consulted during migration? Michael R. Hines
2013-03-19 15:12 ` Michael R. Hines
2013-03-19 15:17 ` Michael S. Tsirkin
2013-03-19 18:27 ` [Qemu-devel] [RFC PATCH RDMA support v4: 08/10] introduce QEMUFileRDMA Michael R. Hines
2013-03-19 18:40 ` Paolo Bonzini [this message]
2013-03-20 15:20 ` Paolo Bonzini
2013-03-20 16:09 ` Michael R. Hines
2013-03-18 3:19 ` [Qemu-devel] [RFC PATCH RDMA support v4: 09/10] check for QMP string and bypass nonblock() calls mrhines
2013-03-18 8:47 ` Paolo Bonzini
2013-03-18 20:37 ` Michael R. Hines
2013-03-19 9:23 ` Paolo Bonzini
2013-03-19 13:08 ` Michael R. Hines
2013-03-19 13:20 ` Paolo Bonzini
2013-03-18 3:19 ` [Qemu-devel] [RFC PATCH RDMA support v4: 10/10] send pc.ram over RDMA mrhines
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