From: "Michael S. Tsirkin" <mst@redhat.com>
To: Michael Galaxy <mgalaxy@akamai.com>
Cc: Sean Hefty <shefty@nvidia.com>, Peter Xu <peterx@redhat.com>,
"Gonglei (Arei)" <arei.gonglei@huawei.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"yu.zhang@ionos.com" <yu.zhang@ionos.com>,
"elmar.gerdes@ionos.com" <elmar.gerdes@ionos.com>,
zhengchuan <zhengchuan@huawei.com>,
"berrange@redhat.com" <berrange@redhat.com>,
"armbru@redhat.com" <armbru@redhat.com>,
"lizhijian@fujitsu.com" <lizhijian@fujitsu.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
Xiexiangyou <xiexiangyou@huawei.com>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"lixiao (H)" <lixiao91@huawei.com>,
"jinpu.wang@ionos.com" <jinpu.wang@ionos.com>,
Wangjialin <wangjialin23@huawei.com>
Subject: Re: [PATCH 0/6] refactor RDMA live migration based on rsocket API
Date: Sun, 29 Sep 2024 14:14:08 -0400 [thread overview]
Message-ID: <20240929141323-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <0730fa9b-49cd-46e4-9264-afabe2486154@akamai.com>
On Sat, Sep 28, 2024 at 12:52:08PM -0500, Michael Galaxy wrote:
> A bounce buffer defeats the entire purpose of using RDMA in these cases.
> When using RDMA for very large transfers like this, the goal here is to map
> the entire memory region at once and avoid all CPU interactions (except for
> message management within libibverbs) so that the NIC is doing all of the
> work.
>
> I'm sure rsocket has its place with much smaller transfer sizes, but this is
> very different.
To clarify, are you actively using rdma based migration in production? Stepping up
to help maintain it?
--
MST
next prev parent reply other threads:[~2024-09-29 18:14 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-04 12:14 [PATCH 0/6] refactor RDMA live migration based on rsocket API Gonglei
2024-06-04 12:14 ` Gonglei via
2024-06-04 12:14 ` [PATCH 1/6] migration: remove RDMA live migration temporarily Gonglei
2024-06-04 12:14 ` Gonglei via
2024-06-04 14:01 ` David Hildenbrand
2024-06-05 10:02 ` Gonglei (Arei)
2024-06-05 10:02 ` Gonglei (Arei) via
2024-06-10 11:45 ` Markus Armbruster
2024-06-04 12:14 ` [PATCH 2/6] io: add QIOChannelRDMA class Gonglei
2024-06-04 12:14 ` Gonglei via
2024-06-10 6:54 ` Jinpu Wang
2024-06-04 12:14 ` [PATCH 3/6] io/channel-rdma: support working in coroutine Gonglei
2024-06-04 12:14 ` Gonglei via
2024-06-06 13:34 ` Haris Iqbal
2024-06-07 8:45 ` Gonglei (Arei)
2024-06-07 8:45 ` Gonglei (Arei) via
2024-06-07 10:01 ` Haris Iqbal
2024-06-07 9:04 ` Daniel P. Berrangé
2024-06-07 9:28 ` Gonglei (Arei)
2024-06-07 9:28 ` Gonglei (Arei) via
2024-06-04 12:14 ` [PATCH 4/6] tests/unit: add test-io-channel-rdma.c Gonglei
2024-06-04 12:14 ` Gonglei via
2024-06-04 12:14 ` [PATCH 5/6] migration: introduce new RDMA live migration Gonglei
2024-06-04 12:14 ` Gonglei via
2024-06-04 12:14 ` [PATCH 6/6] migration/rdma: support multifd for RDMA migration Gonglei
2024-06-04 12:14 ` Gonglei via
2024-06-04 19:32 ` [PATCH 0/6] refactor RDMA live migration based on rsocket API Peter Xu
2024-06-05 10:09 ` Gonglei (Arei)
2024-06-05 10:09 ` Gonglei (Arei) via
2024-06-05 14:18 ` Peter Xu
2024-06-07 8:49 ` Gonglei (Arei)
2024-06-07 8:49 ` Gonglei (Arei) via
2024-06-10 16:35 ` Peter Xu
2024-06-07 10:06 ` Daniel P. Berrangé
2024-06-05 7:57 ` Michael S. Tsirkin
2024-06-05 10:00 ` Gonglei (Arei)
2024-06-05 10:00 ` Gonglei (Arei) via
2024-06-05 10:23 ` Michael S. Tsirkin
2024-06-06 11:31 ` Leon Romanovsky
2024-06-07 1:04 ` Zhijian Li (Fujitsu)
2024-06-07 1:04 ` Zhijian Li (Fujitsu) via
2024-06-07 16:24 ` Yu Zhang
2024-06-07 5:53 ` Jinpu Wang
2024-06-07 8:28 ` Gonglei (Arei)
2024-06-07 8:28 ` Gonglei (Arei) via
2024-06-10 16:31 ` Peter Xu
2024-08-27 20:15 ` Peter Xu
2024-08-27 20:57 ` Michael S. Tsirkin
2024-09-22 19:29 ` Michael Galaxy
2024-09-23 1:04 ` Gonglei (Arei)
2024-09-23 1:04 ` Gonglei (Arei) via
2024-09-25 15:08 ` Peter Xu
2024-09-27 21:45 ` Sean Hefty
2024-09-28 17:52 ` Michael Galaxy
2024-09-29 18:14 ` Michael S. Tsirkin [this message]
2024-09-29 20:26 ` Michael Galaxy
2024-09-29 22:26 ` Michael S. Tsirkin
2024-09-30 15:00 ` Michael Galaxy
2024-09-30 15:31 ` Yu Zhang
2024-09-30 18:16 ` Peter Xu
2024-09-30 19:20 ` Sean Hefty
2024-09-30 19:47 ` Peter Xu
2024-10-03 21:26 ` Michael Galaxy
2024-10-03 21:43 ` Peter Xu
2024-10-04 14:04 ` Michael Galaxy
2024-10-07 8:47 ` Yu Zhang
2024-10-07 13:45 ` Michael Galaxy
2024-10-07 18:15 ` Leon Romanovsky
2024-10-08 9:31 ` Zhu Yanjun
2024-10-23 13:42 ` Michael Galaxy
2024-09-27 20:34 ` Michael Galaxy
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