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GET /api/1.0/patches/2175471/?format=api
{ "id": 2175471, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2175471/?format=api", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/1.0/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20251218085133.26028-2-mehmet.basaran@canonical.com>", "date": "2025-12-18T08:51:33", "name": "[1/1] UBUNTU: SAUCE: Enable upstream config option \"CONFIG_CPUSETS_V1\"", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "45752ef6fcb2ce601ae9611aa068a640f5d9109a", "submitter": { "id": 89305, "url": "http://patchwork.ozlabs.org/api/1.0/people/89305/?format=api", "name": "Mehmet Basaran", "email": "mehmet.basaran@canonical.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/20251218085133.26028-2-mehmet.basaran@canonical.com/mbox/", "series": [ { "id": 485802, "url": "http://patchwork.ozlabs.org/api/1.0/series/485802/?format=api", "date": "2025-12-18T08:51:32", "name": "Fix cpuset behavior to v1 following the changes from upstream stable patches.", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/485802/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2175471/checks/", "tags": {}, "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=qQDarcWC;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; 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charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "BugLink: https://bugs.launchpad.net/bugs/2128722\n\nFor noble , some of the applied upstream commits are using \"CONFIG_CPUSETS_V1\"\nto enable/disable some code paths. This changes the behaviour of cpusets and\ncurrently noble is neither V1 nor V2. Because of this, \"cpuset_inherit\" and\n\"cpuset_hotplug\" test cases are failing in ubuntu_ltp_controllers test suite.\nFor noble, since this is an LTS release we should continue behave like V1.\n\nAdded \"CONFIG_CPUSETS_V1\" kernel config option. This was added to upstream\nvia the following commit:\n\n commit 1abab1ba0775036bb67c6c57945c637be644c04f\n cgroup/cpuset: guard cpuset-v1 code under CONFIG_CPUSETS_V1\n\nI have chosen to go with a SAUCE patch since, the commit above depends on\nother commits. And in the future, we can revert this one and apply the\ndependent commits if we want to follow cpusets follow from 6.12 versions so\nthat there are less conflicts between upstream stable and noble sources.\n\nThe other solution is to remove the use of \"CONFIG_CPUSETS_V1\" macro from\nsources. However this will also cause noble and upstream stable sources to\ndiverge and make it difficult to backport patches.\n\nSigned-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>\n---\n debian.master/config/annotations | 1 +\n init/Kconfig | 13 +++++++++++++\n 2 files changed, 14 insertions(+)", "diff": "diff --git a/debian.master/config/annotations b/debian.master/config/annotations\nindex 9ebb2a92ba55..3f3150b3aa99 100644\n--- a/debian.master/config/annotations\n+++ b/debian.master/config/annotations\n@@ -3293,6 +3293,7 @@ CONFIG_CPU5_WDT policy<{'amd64': 'm'}>\n CONFIG_CPUFREQ_DT_PLATDEV policy<{'arm64': 'y', 'armhf': 'y', 'ppc64el': 'y', 'riscv64': 'y'}>\n CONFIG_CPUMASK_OFFSTACK policy<{'amd64': 'y'}>\n CONFIG_CPUSETS policy<{'amd64': 'y', 'arm64': 'y', 'armhf': 'y', 'ppc64el': 'y', 'riscv64': 'y', 's390x': 'y'}>\n+CONFIG_CPUSETS_V1 policy<{'amd64': 'y', 'arm64': 'y', 'armhf': 'y', 'ppc64el': 'y', 'riscv64': 'y', 's390x': 'y'}>\n CONFIG_CPU_32v6K policy<{'armhf': 'y'}>\n CONFIG_CPU_32v7 policy<{'armhf': 'y'}>\n CONFIG_CPU_ABRT_EV7 policy<{'armhf': 'y'}>\ndiff --git a/init/Kconfig b/init/Kconfig\nindex 426c2464f653..3b728ed594cc 100644\n--- a/init/Kconfig\n+++ b/init/Kconfig\n@@ -1143,6 +1143,19 @@ config CPUSETS\n \n \t Say N if unsure.\n \n+config CPUSETS_V1\n+ bool \"Legacy cgroup v1 cpusets controller\"\n+ depends on CPUSETS\n+ default n\n+ help\n+ Legacy cgroup v1 cpusets controller which has been deprecated by\n+ cgroup v2 implementation. The v1 is there for legacy applications\n+ which haven't migrated to the new cgroup v2 interface yet. If you\n+ do not have any such application then you are completely fine leaving\n+ this option disabled.\n+\n+ Say N if unsure.\n+\n config PROC_PID_CPUSET\n \tbool \"Include legacy /proc/<pid>/cpuset file\"\n \tdepends on CPUSETS\n", "prefixes": [ "1/1" ] }