Thanks for testing, much appreciated! Sent a v2 of SRU: https://lists.ubuntu.com/archives/kernel-team/2022-February/127909.html https://lists.ubuntu.com/archives/kernel-team/2022-February/127908.html
-- 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: In Progress Status in linux package in Ubuntu: In Progress Bug description: == Comment: #0 - D. Gary Chapman <ch...@us.ibm.com> - 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 (ch...@us.ibm.com) ---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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
