On Tue, 1 Jun 2010, Minchan Kim wrote: > Secondly, as Kame pointed out, we have to raise whole thread's > priority to kill victim process for reclaiming pages. But I think it > has deadlock problem. Agreed, this has the potential to actually increase the amount of time for an oom killed task to fully exit: the exit path takes mm->mmap_sem on exit and if that is held by another thread waiting for the oom killed task to exit (i.e. reclaim has failed and the oom killer becomes a no-op because it sees an already killed task) then there's a livelock. That's always been a problem, but is compounded with increasing the priority of a task not holding mm->mmap_sem if the thread holding the writelock actually isn't looking for memory but simply doesn't get a chance to release because it fails to run. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>