On Wed, Feb 15, 2023 at 01:04:12PM +0100, Sumanth Korikkar wrote:
> Hi,
>
> This patch fixes the issue for s390 stable kernel starting 5.10.162.
> The issue was specifically seen after stable version 5.10.162:
> Following commits can trigger it:
> 1. stable commit id - 788d0824269b ("io_uring: import 5.15-stable
> io_uring") can trigger this problem.
> 2. upstream commit id - 75309018a24d ("s390: add support for
> TIF_NOTIFY_SIGNAL")
>
> Problem:
> qemu and user processes could stall when TIF_NOTIFY_SIGNAL is set from
> io_uring work.
>
> Affected users:
> The issue was first raised by the debian team, where the s390
> bullseye build systems are affected.
>
> Upstream commit Id:
> * The attached patch has no upstream commit. However, the stable kernel
> 5.10.162+ uses upstream commit id - 75309018a24d ("s390: add support for
> TIF_NOTIFY_SIGNAL"), which would need this fix
> * Starting from v5.12, there are s390 generic entry commits
> 56e62a737028 ("s390: convert to generic entry") and its relevant fixes,
> which are recommended and should address these problems.
I'm sorry, but I do not understand. What exact commits should be added
to the 5.10.y tree to resolve this?
thanks,
greg k-h
