Thanks to Krzysztof, who spend some time to get this properly in, there is now a patched focal/20.04 kernel 5.4 available here: https://launchpad.net/~krzk/+archive/ubuntu/linux-testing https://launchpad.net/~krzk/+archive/ubuntu/linux-testing/+build/23143306 Since some more effort got spent like originally planned, it's needed and highly appreciated if this kernel can be tested and if we can get feedback if the issue is solved with it.
-- 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 <[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
