Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755780Ab2F1M6a (ORCPT ); Thu, 28 Jun 2012 08:58:30 -0400 Received: from mx1.redhat.com ([209.132.183.28]:31792 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755729Ab2F1M61 (ORCPT ); Thu, 28 Jun 2012 08:58:27 -0400 From: Andrea Arcangeli To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Hillf Danton , Dan Smith , Peter Zijlstra , Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Bharata B Rao , Lee Schermerhorn , Rik van Riel , Johannes Weiner , Srivatsa Vaddagiri , Christoph Lameter , Alex Shi , Mauricio Faria de Oliveira , Konrad Rzeszutek Wilk , Don Morris , Benjamin Herrenschmidt Subject: [PATCH 35/40] autonuma: boost khugepaged scanning rate Date: Thu, 28 Jun 2012 14:56:15 +0200 Message-Id: <1340888180-15355-36-git-send-email-aarcange@redhat.com> In-Reply-To: <1340888180-15355-1-git-send-email-aarcange@redhat.com> References: <1340888180-15355-1-git-send-email-aarcange@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1103 Lines: 34 Until THP native migration is implemented it's safer to boost khugepaged scanning rate because all memory migration are splitting the hugepages. So the regular rate of scanning becomes too low when lots of memory is migrated. Signed-off-by: Andrea Arcangeli --- mm/huge_memory.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 4fcdaf7..bcaa8ac 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -573,6 +573,14 @@ static int __init hugepage_init(void) set_recommended_min_free_kbytes(); +#ifdef CONFIG_AUTONUMA + /* Hack, remove after THP native migration */ + if (num_possible_nodes() > 1) { + khugepaged_scan_sleep_millisecs = 100; + khugepaged_alloc_sleep_millisecs = 10000; + } +#endif + return 0; out: hugepage_exit_sysfs(hugepage_kobj); -- 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/