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From: David Howells <dhowells@redhat.com>
To: David Howells <dhowells@redhat.com>
Cc: Linus Torvalds <torvalds@osdl.org>,
	akpm@osdl.org, dalomar@serrasold.com,
	linux-kernel@vger.kernel.org, uclinux-dev@uclinux.org
Subject: Re: [PATCH 1/3] NOMMU: Provide shared-writable mmap support on ramfs
Date: Wed, 23 Nov 2005 19:25:18 +0000	[thread overview]
Message-ID: <459.1132773918@warthog.cambridge.redhat.com> (raw)
In-Reply-To: <376.1132773809@warthog.cambridge.redhat.com>

David Howells <dhowells@redhat.com> wrote:

> > Truncate is _supposed_ to get rid of any shared mmap stuff. 
> 
> Yeah... but under _NOMMU_ conditions, it can't. There's no MMU around to
> enforce the fact that the mapping has been shrunk.

I may not have mentioned, but this does not apply under MMU conditions. A
different file in fs/ramfs/ swings into action and does the normal thing.

David

      reply	other threads:[~2005-11-23 19:25 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-11-23 18:59 [PATCH 1/3] NOMMU: Provide shared-writable mmap support on ramfs David Howells
2005-11-23 18:59 ` [PATCH 2/3] NOMMU: Make SYSV IPC SHM use ramfs facilities on NOMMU David Howells
2005-11-23 18:59 ` [PATCH 3/3] FRV: Implement futex operations for FRV David Howells
2005-11-23 19:09 ` [PATCH 1/3] NOMMU: Provide shared-writable mmap support on ramfs Linus Torvalds
2005-11-23 19:23   ` David Howells
2005-11-23 19:25     ` David Howells [this message]

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