Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qa0-f74.google.com ([209.85.216.74]:59400 "EHLO mail-qa0-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758750Ab3EFX6Q (ORCPT ); Mon, 6 May 2013 19:58:16 -0400 Received: by mail-qa0-f74.google.com with SMTP id i13so22678qae.3 for ; Mon, 06 May 2013 16:58:16 -0700 (PDT) From: Colin Cross To: linux-kernel@vger.kernel.org Cc: Pavel Machek , "Rafael J. Wysocki" , Peter Zijlstra , Ingo Molnar , Andrew Morton , Mandeep Singh Baines , Colin Cross , Oleg Nesterov , linux-nfs@vger.kernel.org, linux-pm@vger.kernel.org, netdev@vger.kernel.org, Linus Torvalds , Tejun Heo , Thomas Gleixner Subject: [PATCH v3 14/16] nanosleep: use freezable blocking call Date: Mon, 6 May 2013 16:50:19 -0700 Message-Id: <1367884221-20462-15-git-send-email-ccross@android.com> In-Reply-To: <1367884221-20462-1-git-send-email-ccross@android.com> References: <1367884221-20462-1-git-send-email-ccross@android.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Avoid waking up every thread sleeping in a nanosleep 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. Acked-by: Tejun Heo Acked-by: Thomas Gleixner Signed-off-by: Colin Cross --- kernel/hrtimer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 14be27f..e036276 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -47,6 +47,7 @@ #include #include #include +#include #include @@ -1525,7 +1526,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod t->task = NULL; if (likely(t->task)) - schedule(); + freezable_schedule(); hrtimer_cancel(&t->timer); mode = HRTIMER_MODE_ABS; -- 1.8.2.1