Re: [PATCH liburing 1/2] test/send_recvmsg: Preserve msghdr until op_recvmsg completes

On 7/22/26 12:17 PM, Gabriel Krisman Bertazi wrote:
> msghdr is allocated on the stack at recv_prep, which means it may go out
> of scope before the kernel has a chance to complete the operation.  This
> results in spurious test failures when we reach far enough into recv_fn
> to reuse the stack space before op_recvmsg executes.  I found it easily
> reproducible when compiling with '-O0 -g3' to avoid gcc from optimizing
> further local variables out of the stack.

Hmm, but that should be fine as long as a) we submit in scope, and b)
we're not using SQPOLL, where it does need to remain consistent until
completion.

And recv_prep() certainly submits before it returns, and we're not using
SQPOLL. So I'm curious what issue this is?? Same questions on patch 2.

-- 
Jens Axboe