Re: I request inclusion of SAS Transport Layer and AIC-94xx intothe kernel

From: Luben Tuikov
Date: Mon Oct 03 2005 - 11:39:54 EST


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

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