On 06/06/2024 19:31, Leon Romanovsky wrote: > 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? Yes, it does Thanks Zhijian > > Thanks >
