On Fri, 19 Oct 2012, Kamezawa Hiroyuki wrote: > From c5849c9034abeec3f26bf30dadccd393b0c5c25e Mon Sep 17 00:00:00 2001 > From: KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com> > Date: Fri, 19 Oct 2012 17:00:55 +0900 > Subject: [PATCH] hold task->mempolicy while numa_maps scans. > > /proc/<pid>/numa_maps scans vma and show mempolicy under > mmap_sem. It sometimes accesses task->mempolicy which can > be freed without mmap_sem and numa_maps can show some > garbage while scanning. > > This patch tries to take reference count of task->mempolicy at reading > numa_maps before calling get_vma_policy(). By this, task->mempolicy > will not be freed until numa_maps reaches its end. > > Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com>
Looks good, but the patch is whitespace damaged so it doesn't apply. When that's fixed: Acked-by: David Rientjes <rient...@google.com> Thanks for following through on this! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
