Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754509AbbGWVyq (ORCPT ); Thu, 23 Jul 2015 17:54:46 -0400 Received: from catern.com ([104.131.201.120]:43920 "EHLO mail.catern.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754239AbbGWVyn (ORCPT ); Thu, 23 Jul 2015 17:54:43 -0400 From: Spencer Baugh To: Andrew Morton , Naoya Horiguchi , David Rientjes , Davidlohr Bueso , Mike Kravetz , Luiz Capitulino , linux-mm@kvack.org (open list:MEMORY MANAGEMENT), linux-kernel@vger.kernel.org (open list) Cc: Joern Engel , Spencer Baugh , Joern Engel , Spencer Baugh Subject: [PATCH] hugetlb: cond_resched for set_max_huge_pages and follow_hugetlb_page Date: Thu, 23 Jul 2015 14:54:31 -0700 Message-Id: <1437688476-3399-1-git-send-email-sbaugh@catern.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1187 Lines: 38 From: Joern Engel ~150ms scheduler latency for both observed in the wild. Signed-off-by: Joern Engel Signed-off-by: Spencer Baugh --- mm/hugetlb.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index a8c3087..2eb6919 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1836,6 +1836,7 @@ static unsigned long set_max_huge_pages(struct hstate *h, unsigned long count, ret = alloc_fresh_gigantic_page(h, nodes_allowed); else ret = alloc_fresh_huge_page(h, nodes_allowed); + cond_resched(); spin_lock(&hugetlb_lock); if (!ret) goto out; @@ -3521,6 +3522,7 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, spin_unlock(ptl); ret = hugetlb_fault(mm, vma, vaddr, (flags & FOLL_WRITE) ? FAULT_FLAG_WRITE : 0); + cond_resched(); if (!(ret & VM_FAULT_ERROR)) continue; -- 2.5.0.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/