From mboxrd@z Thu Jan 1 00:00:00 1970 From: Luben Tuikov Subject: Re: I request inclusion of SAS Transport Layer and AIC-94xx into the kernel Date: Mon, 03 Oct 2005 12:39:28 -0400 Message-ID: <43415EC0.1010506@adaptec.com> References: <547AF3BD0F3F0B4CBDC379BAC7E4189F01A9FA11@otce2k03.adaptec.com> <1128105594.10079.109.camel@bluto.andrew> <433D9035.6000504@adaptec.com> <1128111290.10079.147.camel@bluto.andrew> <433DA0DF.9080308@adaptec.com> <1128114950.10079.170.camel@bluto.andrew> <433DB5D7.3020806@adaptec.com> <9B90AC8A-A678-4FFE-B42D-796C8D87D65B@neostrada.pl> <4341381D.2060807@adaptec.com> <1128357350.10079.239.camel@bluto.andrew> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1128357350.10079.239.camel@bluto.andrew> Sender: linux-kernel-owner@vger.kernel.org To: andrew.patterson@hp.com Cc: Marcin Dalecki , "Salyzyn, Mark" , dougg@torque.net, Linus Torvalds , Luben Tuikov , SCSI Mailing List , Linux Kernel Mailing List List-Id: linux-scsi@vger.kernel.org On 10/03/05 12:35, Andrew Patterson wrote: > On Mon, 2005-10-03 at 18:29 +0200, Marcin Dalecki wrote: >>They give a means of possible synchronization between beneviolent >>users, but not a mandatory lock on the shared resource. >> > > > Nor do they protect against external events, such as disk > insertion/removals, and someone kicking a cable. As has _always_ been the case in UNIX: Provide capability, not policy. The more things are off loaded to userspace the better. Look at it this way: the deadbolt on your house door does not _eliminate_ the possibility of someone cleaning out your house, even if you have a security system and/or a guard dog. Same thing here. Luben