Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932643Ab3EFXvH (ORCPT ); Mon, 6 May 2013 19:51:07 -0400 Received: from mail-qc0-f202.google.com ([209.85.216.202]:49787 "EHLO mail-qc0-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932577Ab3EFXui (ORCPT ); Mon, 6 May 2013 19:50:38 -0400 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 , "David S. Miller" , Eric Dumazet , Al Viro , "Eric W. Biederman" , Gao feng Subject: [PATCH v3 16/16] af_unix: use freezable blocking calls in read Date: Mon, 6 May 2013 16:50:21 -0700 Message-Id: <1367884221-20462-17-git-send-email-ccross@android.com> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1367884221-20462-1-git-send-email-ccross@android.com> References: <1367884221-20462-1-git-send-email-ccross@android.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1658 Lines: 46 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. Acked-by: Tejun Heo 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 -- 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/