On 7/12/19 10:54 PM, Zhengyuan Liu wrote: > As we introduced three lists(async, defer, link), there could been > many sqe allocation. A natural idea is using kmem_cache to satisfy > the allocation just like io_kiocb does. A change like this needs to come with some performance numbers or utilization numbers showing the benefit. I have considered doing this before, but just never got around to testing if it's worth while or not. Have you? -- Jens Axboe