From owner-cvs-all@FreeBSD.ORG  Wed Mar 19 07:35:14 2008
Return-Path: <owner-cvs-all@FreeBSD.ORG>
Delivered-To: cvs-all@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C64B51065676;
	Wed, 19 Mar 2008 07:35:14 +0000 (UTC)
	(envelope-from jeff@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id 8BE1B8FC31;
	Wed, 19 Mar 2008 07:35:14 +0000 (UTC)
	(envelope-from jeff@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.1/8.14.1) with ESMTP id m2J7ZEaO000503;
	Wed, 19 Mar 2008 07:35:14 GMT
	(envelope-from jeff@repoman.freebsd.org)
Received: (from jeff@localhost)
	by repoman.freebsd.org (8.14.1/8.14.1/Submit) id m2J7ZEhO000502;
	Wed, 19 Mar 2008 07:35:14 GMT (envelope-from jeff)
Message-Id: <200803190735.m2J7ZEhO000502@repoman.freebsd.org>
From: Jeff Roberson <jeff@FreeBSD.org>
Date: Wed, 19 Mar 2008 07:35:14 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/sys/kern subr_sleepqueue.c
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 19 Mar 2008 07:35:15 -0000

jeff        2008-03-19 07:35:14 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             subr_sleepqueue.c 
  Log:
   - At the top of sleepq_catch_signals() lock the thread and check TDF_NEEDSIGCHK
     before doing the very expensive cursig() and related locking.  NEEDSIGCHK
     is updated whenever our signal mask change or when a signal is delivered and
     should be sufficient to avoid the more expensive tests.  This eliminates
     another source of PROC_LOCK contention in multithreaded programs.
  
  Revision  Changes    Path
  1.50      +12 -4     src/sys/kern/subr_sleepqueue.c