linux-kernel - Re: Security issues with local filesystem caching

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Message-Id: <1161863541.12781.32.camel@localhost.localdomain>
Date:	Thu, 26 Oct 2006 12:52:21 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jan Dittmer <jdi@....org>
Cc:	David Howells <dhowells@...hat.com>, sds@...ho.nsa.gov,
	jmorris@...ei.org, chrisw@...s-sol.org, selinux@...ho.nsa.gov,
	linux-kernel@...r.kernel.org, aviro@...hat.com
Subject: Re: Security issues with local filesystem caching

Ar Iau, 2006-10-26 am 11:14 +0200, ysgrifennodd Jan Dittmer:
> Why again no local userspace daemon to do the caching? That would
> put the policy out of the kernel. The additional context switches
> are probably pretty cheap compared to the io operations.

It costs a lot in latency, and you don't need a daemon in the first
place. If you want to do a user space caching fs of course you can
already do it with FUSE..

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