On Wed, Jun 05, 2024 at 10:00:24AM +0000, Gonglei (Arei) wrote: > > > > -----Original Message----- > > From: Michael S. Tsirkin [mailto:mst@xxxxxxxxxx] > > Sent: Wednesday, June 5, 2024 3:57 PM > > To: Gonglei (Arei) <arei.gonglei@xxxxxxxxxx> > > Cc: qemu-devel@xxxxxxxxxx; peterx@xxxxxxxxxx; yu.zhang@xxxxxxxxx; > > mgalaxy@xxxxxxxxxx; elmar.gerdes@xxxxxxxxx; zhengchuan > > <zhengchuan@xxxxxxxxxx>; berrange@xxxxxxxxxx; armbru@xxxxxxxxxx; > > lizhijian@xxxxxxxxxxx; pbonzini@xxxxxxxxxx; Xiexiangyou > > <xiexiangyou@xxxxxxxxxx>; linux-rdma@xxxxxxxxxxxxxxx; lixiao (H) > > <lixiao91@xxxxxxxxxx>; jinpu.wang@xxxxxxxxx; Wangjialin > > <wangjialin23@xxxxxxxxxx> > > Subject: Re: [PATCH 0/6] refactor RDMA live migration based on rsocket API > > > > On Tue, Jun 04, 2024 at 08:14:06PM +0800, Gonglei wrote: > > > From: Jialin Wang <wangjialin23@xxxxxxxxxx> > > > > > > Hi, > > > > > > This patch series attempts to refactor RDMA live migration by > > > introducing a new QIOChannelRDMA class based on the rsocket API. > > > > > > The /usr/include/rdma/rsocket.h provides a higher level rsocket API > > > that is a 1-1 match of the normal kernel 'sockets' API, which hides > > > the detail of rdma protocol into rsocket and allows us to add support > > > for some modern features like multifd more easily. > > > > > > Here is the previous discussion on refactoring RDMA live migration > > > using the rsocket API: > > > > > > https://lore.kernel.org/qemu-devel/20240328130255.52257-1-philmd@linar > > > o.org/ > > > > > > We have encountered some bugs when using rsocket and plan to submit > > > them to the rdma-core community. > > > > > > In addition, the use of rsocket makes our programming more convenient, > > > but it must be noted that this method introduces multiple memory > > > copies, which can be imagined that there will be a certain performance > > > degradation, hoping that friends with RDMA network cards can help verify, > > thank you! > > > > So you didn't test it with an RDMA card? > > Yep, we tested it by Soft-ROCE. Does Soft-RoCE (RXE) support live migration? Thanks
