diff options
Diffstat (limited to 'patches/sched-Fix-get_push_task-vs-migrate_disable.patch')
| -rw-r--r-- | patches/sched-Fix-get_push_task-vs-migrate_disable.patch | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/patches/sched-Fix-get_push_task-vs-migrate_disable.patch b/patches/sched-Fix-get_push_task-vs-migrate_disable.patch deleted file mode 100644 index 2a0edf8fc5fc..000000000000 --- a/patches/sched-Fix-get_push_task-vs-migrate_disable.patch +++ /dev/null @@ -1,38 +0,0 @@ -From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Date: Thu, 26 Aug 2021 15:37:38 +0200 -Subject: [PATCH] sched: Fix get_push_task() vs migrate_disable() - -push_rt_task() attempts to move the currently running task away if the -next runnable task has migration disabled and therefore is pinned on the -current CPU. - -The current task is retrieved via get_push_task() which only checks for -nr_cpus_allowed == 1, but does not check whether the task has migration -disabled and therefore cannot be moved either. The consequence is a -pointless invocation of the migration thread which correctly observes -that the task cannot be moved. - -Return NULL if the task has migration disabled and cannot be moved to -another CPU. - -Cc: stable-rt@vger.kernel.org -Fixes: a7c81556ec4d3 ("sched: Fix migrate_disable() vs rt/dl balancing") -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> -Link: https://lkml.kernel.org/r/20210826133738.yiotqbtdaxzjsnfj@linutronix.de ---- - kernel/sched/sched.h | 3 +++ - 1 file changed, 3 insertions(+) - ---- a/kernel/sched/sched.h -+++ b/kernel/sched/sched.h -@@ -2255,6 +2255,9 @@ static inline struct task_struct *get_pu - if (p->nr_cpus_allowed == 1) - return NULL; - -+ if (p->migration_disabled) -+ return NULL; -+ - rq->push_busy = true; - return get_task_struct(p); - } |