在 2021/3/31 下午11:36, Jens Axboe 写道:
On 3/31/21 3:01 AM, Hao Xu wrote:Now that we have multishot poll requests, one sqe can emit multiple cqes. given below example: sqe0(multishot poll)-->sqe1-->sqe2(drain req) sqe2 is designed to issue after sqe0 and sqe1 completed, but since sqe0 is a multishot poll request, sqe2 may be issued after sqe0's event triggered twice before sqe1 completed. This isn't what users leverage drain requests for. Here a simple solution is to ignore all multishot poll cqes, which means drain requests won't wait those request to be done.Good point, we need to do something here... Looks simple enough to me, though I'd probably prefer if we rename 'multishot_cqes' to 'persistent_sqes' or something like that. It's likely not the last user of having 1:M mappings between sqe and cqe, so might as well try and name it a bit more appropriately.
persistent_sqes makes sense to me.
