From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759300Ab3EBBfy (ORCPT ); Wed, 1 May 2013 21:35:54 -0400 Received: from mail-qc0-f201.google.com ([209.85.216.201]:37590 "EHLO mail-qc0-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759001Ab3EBBfZ (ORCPT ); Wed, 1 May 2013 21:35:25 -0400 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 , "David S. Miller" , Eric Dumazet , Al Viro , "Eric W. Biederman" , Gao feng , netdev@vger.kernel.org Subject: [PATCH v2 10/10] af_unix: use freezable blocking calls in read Date: Wed, 1 May 2013 18:35:08 -0700 Message-Id: <1367458508-9133-11-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> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Avoid waking up every thread sleeping in read call on an AF_UNIX socket 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 --- net/unix/af_unix.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 2db702d..2bcac57 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -114,6 +114,7 @@ #include #include #include +#include struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE]; EXPORT_SYMBOL_GPL(unix_socket_table); @@ -1880,7 +1881,7 @@ static long unix_stream_data_wait(struct sock *sk, long timeo) set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); unix_state_unlock(sk); - timeo = schedule_timeout(timeo); + timeo = freezable_schedule_timeout(timeo); unix_state_lock(sk); clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); } -- 1.8.2.1