From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Lameter Subject: [11/17] GFP_VFALLBACK for zone wait table. Date: Tue, 25 Sep 2007 16:42:15 -0700 Message-ID: <20070925234251.740483810@sgi.com> References: <20070925234204.546836393@sgi.com> Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org To: unlisted-recipients:; (no To-header on input) Return-path: Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:36409 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752831AbXIYXmw (ORCPT ); Tue, 25 Sep 2007 19:42:52 -0400 Content-Disposition: inline; filename=vcompound_wait_table_no_vmalloc Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Currently vmalloc is used for the zone wait table possibly generating the need to generate lots of TLBs to access the tables. We can now use GFP_VFALLBACK to attempt the use of a physically contiguous page that can then use the large kernel TLBs. Signed-off-by: Christoph Lameter --- mm/page_alloc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) Index: linux-2.6/mm/page_alloc.c =================================================================== --- linux-2.6.orig/mm/page_alloc.c 2007-09-24 18:48:06.000000000 -0700 +++ linux-2.6/mm/page_alloc.c 2007-09-24 18:48:16.000000000 -0700 @@ -2550,7 +2550,9 @@ int zone_wait_table_init(struct zone *zo * To use this new node's memory, further consideration will be * necessary. */ - zone->wait_table = (wait_queue_head_t *)vmalloc(alloc_size); + zone->wait_table = (wait_queue_head_t *) + __get_free_pages(GFP_VFALLBACK, + get_order(alloc_size)); } if (!zone->wait_table) return -ENOMEM; --