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:
- 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