From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757819AbYAQWzE (ORCPT ); Thu, 17 Jan 2008 17:55:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762037AbYAQWto (ORCPT ); Thu, 17 Jan 2008 17:49:44 -0500 Received: from mx1.redhat.com ([66.187.233.31]:38427 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762028AbYAQWtm (ORCPT ); Thu, 17 Jan 2008 17:49:42 -0500 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20080117204804.GC6416@fieldses.org> References: <20080117204804.GC6416@fieldses.org> <20080115234724.22183.9603.stgit@warthog.procyon.org.uk> <20080115234652.22183.24850.stgit@warthog.procyon.org.uk> <20849.1200590240@redhat.com> To: "J. Bruce Fields" Cc: dhowells@redhat.com, sds@tycho.nsa.gov, casey@schaufler-ca.com, Trond.Myklebust@netapp.com, neilb@suse.de, linux-kernel@vger.kernel.org, selinux@tycho.nsa.gov, linux-security-module@vger.kernel.org, nfs@lists.sourceforge.net Subject: Re: [PATCH 06b/26] Security: Make NFSD work with detached security X-Mailer: MH-E 8.0.3+cvs; nmh 1.2-20070115cvs; GNU Emacs 23.0.50 Date: Thu, 17 Jan 2008 22:48:47 +0000 Message-ID: <28942.1200610127@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org J. Bruce Fields wrote: > Just curious--why? Are get_kernel_security(), etc., particularly > expensive? It involves a kmalloc(). That means an extra possibility for an error. Plus it may allow you to cache the result of checking whether, say, SELinux security labels are allowed to be set when passed over NFS (if such is possible). David