** Changed in: ubuntu-z-systems
Status: In Progress => Fix Committed
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1959529
Title:
Hipersocket page allocation failure on Ubuntu 20.04 based SSC
environments
Status in Ubuntu on IBM z Systems:
Fix Committed
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Focal:
Fix Committed
Bug description:
== Comment: #0 - D. Gary Chapman <[email protected]> - 2022-01-26 12:43:25 ==
---Problem Description---
IBM IDAA customer exposes hipersocket page allocation failure on Ubuntu 20.04
based SSC
Contact Information = Gary Chapman ([email protected])
---uname output---
5.4.0-73-generic #82-Ubuntu
Machine Type = IBM Z in IDAA SSC-mode lpar
---Debugger---
A debugger is not configured
----------
IBM SSC LEVEL: 4.1.5
IBM IDAA LEVEL: 7.5.6
On a client system we are observing this:
Jan 19 16:25:57 data5 kernel: kworker/u760:28: page allocation failure:
order:0, mode:0xa20(GFP_ATOMIC), nodemask=(null),cpuset=/,mems_allowed=0
Jan 19 16:25:57 data5 kernel: CPU: 20 PID: 4137988 Comm: kworker/u760:28
Kdump: loaded Tainted: G OE 5.4.0-73-generic #82-Ubuntu
Jan 19 16:25:57 data5 kernel: Hardware name: IBM 8561 T01 727 (LPAR)
Jan 19 16:25:57 data5 kernel: Workqueue: kcryptd/253:11 kcryptd_crypt
[dm_crypt]
Jan 19 16:25:57 data5 kernel: Call Trace:
Jan 19 16:25:57 data5 kernel: ([<0000006b6d63e092>] show_stack+0x7a/0xc0)
Jan 19 16:25:57 data5 kernel: [<0000006b6d64588a>] dump_stack+0x8a/0xb8
Jan 19 16:25:57 data5 kernel: [<0000006b6cfd8262>] warn_alloc+0xe2/0x160
IBM LTC Networking team has identified the upstream commit
714c9108851743bb718fbc1bfb81290f12a53854 as the root cause.
This patch shows up in the Ubuntu kernel source tree:
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/commit/?id=714c9108851743bb718fbc1bfb81290f12a53854
but has not been ported to Ubuntu 20.04 / kernel 5.4
IDAA on SSC requests backport to focal.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1959529/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
