From ae7efa507dee4813ec4bcdadebeec191e247d0c9 Mon Sep 17 00:00:00 2001 From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Date: Wed, 15 Apr 2015 16:14:23 -0700 Subject: [PATCH] thp: do not adjust zone water marks if khugepaged is not started set_recommended_min_free_kbytes() adjusts zone water marks to be suitable for khugepaged. We avoid doing this if khugepaged is disabled, but don't catch the case when khugepaged is failed to start. Let's address this by checking khugepaged_thread instead of khugepaged_enabled() in set_recommended_min_free_kbytes(). It's NULL if the kernel thread is stopped or failed to start. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- mm/huge_memory.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index c257006749bb9..0af19fffe1dfc 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -110,7 +110,8 @@ static int set_recommended_min_free_kbytes(void) int nr_zones = 0; unsigned long recommended_min; - if (!khugepaged_enabled()) + /* khugepaged thread has stopped to failed to start */ + if (!khugepaged_thread) return 0; for_each_populated_zone(zone) -- GitLab