From owner-freebsd-current@FreeBSD.ORG Fri May 29 15:44:22 2009 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 75ACD106568C for ; Fri, 29 May 2009 15:44:22 +0000 (UTC) (envelope-from barney_cordoba@yahoo.com) Received: from web63902.mail.re1.yahoo.com (web63902.mail.re1.yahoo.com [69.147.97.117]) by mx1.freebsd.org (Postfix) with SMTP id 0806D8FC15 for ; Fri, 29 May 2009 15:44:21 +0000 (UTC) (envelope-from barney_cordoba@yahoo.com) Received: (qmail 22956 invoked by uid 60001); 29 May 2009 15:44:21 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1243611861; bh=NI0pIIj9pfep0pdwBbYsDxKPI7y1moRAqcr2PAALsJc=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=m292KHxnrrw35St5xCkUDoZIp3IO5zNbHBTI89HKmvvQTrp+8jvOIJCH2IdoJsE/SvK7EYxtpKN0fzNCdDPLqPdVeb7GERsWPdktzpvPzAUoPcNU/UOej1KoW56UAOZBMdPCeOvbaSPUUA/UXNvBtNUbZOieoN/8FVyyCDy1w3E= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=1R8OeCpBTZVoDct1rmUlajGTxcdokd+9ImjIiO1Jwdkzs5XhmQhvhOBnfVY4ruRsX0WkbMcCPWMDGy6wthQDYEYjBEY3XNbsimo9K3SLV2bElWkaZqj0eS7ibTrUtSVlecwgEl1x2RDKNqUvi3CzWgMH2TZx1Cw5aAQPlVei4h8=; Message-ID: <568525.22949.qm@web63902.mail.re1.yahoo.com> X-YMail-OSG: qxKx9.MVM1k3kZg7JTdICls5B6eFwYpMrBR2fq7TO3F_BJ2nhkRxAsxyH7b6qytIXYU1bYxjUXSTUSzkwM8u4ej5ms_DiJBkKHOMg56.X.uH8nPrQOBMQc_1igDR6XaL.pXlyt9Ll3e8OuITtiWGBxJ2xSnE_CgAdk9Km7WlHwtX0g2JpArZAsWSq5OMn.6n6ARmz9duy0nfSaRxZwhYVSYDGc_nnbdIW_RgS3xLmfJsjG7HLrY0msxQj3FM.3HGlGHv6Kzg9S4YjYxh20B5HDYa9JmxprNwofjziizrYQ-- Received: from [66.176.162.245] by web63902.mail.re1.yahoo.com via HTTP; Fri, 29 May 2009 08:44:21 PDT X-Mailer: YahooMailClassic/5.3.9 YahooMailWebService/0.7.289.10 Date: Fri, 29 May 2009 08:44:21 -0700 (PDT) From: Barney Cordoba To: current@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Subject: lock protection for kmem access X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 May 2009 15:44:22 -0000 How are memory accesses from user space using kmem protected in the kernel? I'm trying to get a handle on how such accesses might affect operations within the kernel. Thanks, Barney