On Sun, May 2, 2021 at 4:04 PM Pavel Begunkov [off-list ref] wrote:

quoted

I tested against the HEAD b1ef997bec4d5cf251bfb5e47f7b04afa49bcdfe

However, there is a bunch patches fixing sqpoll cancellations in
5.13, all are waiting for backporting. and for-next doesn't trigger
the issue for me.

Are you absolutely sure b1ef997bec4d5cf251bfb5e47f7b04afa49bcdfe
does hit it?

quoted

commit on for-next tree
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/?h=for-next
and the reproducer fails.

Hi Pavel and Hillf,

I believe there's a little misunderstanding, apologies. The reproducer
does not trigger the bug on the for-next tree which has patches for
5.13. The reproducer process exits correctly. Likely one of those
commits that will be back-ported to 5.12 will address this issue.
When I wrote `the reproducer fails`, I meant to indicate that the bug
is not triggered on for-next. I will word it better next time!

Palash