Messages in this thread Patch in this message | | | Date | Fri, 25 Jan 2002 15:23:57 +0100 (CET) | From | Ingo Molnar <> | Subject | [patch] [sched] set_cpus_allowed() fix, 2.5.3-pre5 |
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the attached patch fixes set_cpus_allowed() to set p->state *before* sending the migration IPI. This is a rare codepath used during bootup only, so the race was never seen in action. The bug was noticed by Robert Love.
Ingo
--- linux/kernel/sched.c.orig Fri Jan 25 10:44:18 2002 +++ linux/kernel/sched.c Fri Jan 25 12:06:36 2002 @@ -803,9 +837,9 @@ if (new_mask & (1UL << smp_processor_id())) return; #if CONFIG_SMP + current->state = TASK_UNINTERRUPTIBLE; smp_migrate_task(ffz(~new_mask), current);
- current->state = TASK_UNINTERRUPTIBLE; schedule(); #endif }
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