Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269260AbUINK5x (ORCPT ); Tue, 14 Sep 2004 06:57:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269257AbUINK5x (ORCPT ); Tue, 14 Sep 2004 06:57:53 -0400 Received: from mx1.elte.hu ([157.181.1.137]:50668 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S269262AbUINK5k (ORCPT ); Tue, 14 Sep 2004 06:57:40 -0400 Date: Tue, 14 Sep 2004 12:59:04 +0200 From: Ingo Molnar To: Andrew Morton Cc: linux-kernel@vger.kernel.org Subject: [patch] sched, mm: fix scheduling latencies in get_user_pages() Message-ID: <20040914105904.GB31370@elte.hu> References: <20040914091529.GA21553@elte.hu> <20040914093855.GA23258@elte.hu> <20040914095110.GA24094@elte.hu> <20040914095731.GA24622@elte.hu> <20040914100652.GB24622@elte.hu> <20040914101904.GD24622@elte.hu> <20040914102517.GE24622@elte.hu> <20040914104449.GA30790@elte.hu> <20040914105048.GA31238@elte.hu> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="A6N2fC+uXW/VQSAv" Content-Disposition: inline In-Reply-To: <20040914105048.GA31238@elte.hu> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1128 Lines: 41 --A6N2fC+uXW/VQSAv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline The attached patch fixes long scheduling latencies in get_user_pages(). has been tested as part of the -VP patchset. Ingo --A6N2fC+uXW/VQSAv Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="fix-latency-get_user_pages.patch" The attached patch fixes long scheduling latencies in get_user_pages(). has been tested as part of the -VP patchset. Signed-off-by: Ingo Molnar --- linux/mm/memory.c.orig +++ linux/mm/memory.c @@ -781,6 +781,8 @@ int get_user_pages(struct task_struct *t do { struct page *map; int lookup_write = write; + + cond_resched_lock(&mm->page_table_lock); while (!(map = follow_page(mm, start, lookup_write))) { /* * Shortcut for anonymous pages. We don't want --A6N2fC+uXW/VQSAv-- - 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/