From patchwork Thu May 2 01:35:04 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colin Cross X-Patchwork-Id: 2509741 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 981BDDF230 for ; Thu, 2 May 2013 01:42:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757098Ab3EBBmO (ORCPT ); Wed, 1 May 2013 21:42:14 -0400 Received: from mail-ye0-f202.google.com ([209.85.213.202]:42523 "EHLO mail-ye0-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752891Ab3EBBmN (ORCPT ); Wed, 1 May 2013 21:42:13 -0400 Received: by mail-ye0-f202.google.com with SMTP id r13so14807yen.5 for ; Wed, 01 May 2013 18:42:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references:x-gm-message-state; bh=FdvRdXDheQjtnn7aOEYmekIHcZJM9k4kNEyCrcAQLdY=; b=fDBlCRfAg8lj+DD6PdbU7z6YgHmGgq8L0XFbWf1I5BSke7O8uEV9d+N3pYn7tN3Glc 4P/fMP3+2GX/+WyQY5PAlnRd9300PQhmDwdH45S6fKeeIrM2yedSubIxbvNhBY9wW4K6 +7dNewSN0Pj7BrtfhTITcbFczZw0w7XQ7zMnjrdTiQZFhLGJsEkrs4HpY548gMtZ5iDw XCEPGtMvBWcGytuV+n0jFX0LFvIbAPQiGygzdHuAcuyJ5if/gecLZP2RZTeB0eoNoKmj b9Btkmc6OiZ4iDqwO6uTZfPhMm05+K7rZsu1ztngtVbYpc+A44qrlYtpKqWSi9ykLP0T 2oTw== X-Received: by 10.236.91.206 with SMTP id h54mr3579747yhf.27.1367458518480; Wed, 01 May 2013 18:35:18 -0700 (PDT) Received: from corp2gmr1-1.hot.corp.google.com (corp2gmr1-1.hot.corp.google.com [172.24.189.92]) by gmr-mx.google.com with ESMTPS id n78si403062yhh.1.2013.05.01.18.35.18 for (version=TLSv1.1 cipher=AES128-SHA bits=128/128); Wed, 01 May 2013 18:35:18 -0700 (PDT) Received: from walnut.mtv.corp.google.com (walnut.mtv.corp.google.com [172.18.105.48]) by corp2gmr1-1.hot.corp.google.com (Postfix) with ESMTP id 5179C31C042; Wed, 1 May 2013 18:35:18 -0700 (PDT) Received: by walnut.mtv.corp.google.com (Postfix, from userid 99897) id 12113160F41; Wed, 1 May 2013 18:35:18 -0700 (PDT) From: Colin Cross To: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , arve@android.com, Tejun Heo , Oleg Nesterov , Colin Cross , Alexander Viro , linux-fsdevel@vger.kernel.org Subject: [PATCH v2 06/10] select: use freezable blocking call Date: Wed, 1 May 2013 18:35:04 -0700 Message-Id: <1367458508-9133-7-git-send-email-ccross@android.com> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1367458508-9133-1-git-send-email-ccross@android.com> References: <1367458508-9133-1-git-send-email-ccross@android.com> X-Gm-Message-State: ALoCoQknRMfxKZfi2g9bLDORM0vzs3rHXAkp1ePLyvEguTly7hnnvp3GC2tvsoMU5ov2hUMpS5SiZt4OY7lcLtlWQW4k96GPvo7eTSq1oH3Y+hDO2mmRZSGDdTpXUOLvNxdmZmrZFYdMFkZMSNnY6ML1haW+jjoG88aqm45eprSN0YHJqoG2OB78bVfu1gtG4lvAIt19hzCJ Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Avoid waking up every thread sleeping in a select call during suspend and resume by calling a freezable blocking call. Previous patches modified the freezer to avoid sending wakeups to threads that are blocked in freezable blocking calls. This call was selected to be converted to a freezable call because it doesn't hold any locks or release any resources when interrupted that might be needed by another freezing task or a kernel driver during suspend, and is a common site where idle userspace tasks are blocked. Signed-off-by: Colin Cross --- fs/select.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/select.c b/fs/select.c index 8c1c96c..6b14dc7 100644 --- a/fs/select.c +++ b/fs/select.c @@ -27,6 +27,7 @@ #include #include #include +#include #include @@ -236,7 +237,8 @@ int poll_schedule_timeout(struct poll_wqueues *pwq, int state, set_current_state(state); if (!pwq->triggered) - rc = schedule_hrtimeout_range(expires, slack, HRTIMER_MODE_ABS); + rc = freezable_schedule_hrtimeout_range(expires, slack, + HRTIMER_MODE_ABS); __set_current_state(TASK_RUNNING); /*