Re: [PATCH 3/3] fork, vhost: Use CLONE_THREAD to fix freezer/ps regression

From: michael . christie
Date: Mon May 29 2023 - 12:12:09 EST

On 5/29/23 6:19 AM, Oleg Nesterov wrote:
> If we want CLONE_THREAD, I think vhost_worker() should exit after get_signal()
> returns SIGKILL. Perhaps it should "disable" vhost_work_queue() somehow and
> flush the pending works on ->work_list before exit, I dunno. But imo it should
> not wait for the final fput().

Just a FYI, I coded this. It's pre-RFC quality. It's invasive. If we want to go
this route then we have to do a temp hack for 6.4 or revert then do this route
for 6.5 or 6.6 (vhost devs will need time to review and we need time to full test).