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Re: CVS commit: src/sys/kern
On Wed, 24 Sep 2008 13:46:34 -0400
Thor Lancelot Simon <tls%rek.tjls.com@localhost> wrote:
> On Wed, Sep 24, 2008 at 07:38:20PM +0700, Robert Elz wrote:
> > Date: Wed, 24 Sep 2008 10:07:19 +0000 (UTC)
> > From: Andrew Doran <ad%NetBSD.org@localhost>
> > Message-ID: <20080924100719.D78AE175D0%cvs.netbsd.org@localhost>
> > | Prevent r/w to r/o downgrade until such time as someone has
> > verified all | the relevant file system code.
> > Please don't do that - I do rw -> ro "down"grades (I'd call it an
> > upgrade...) all the time. As long as you know what's up (that is,
> > to make sure there is no possibility of stale data) it is fine, and
> > causes no problems.
> This also breaks products which run from flash with their filesystems
> mounted read-only most of the time, but remount them read-write in
> order to write back configuration data when it changes. That is not
> an uncommon model AFAIK and it poses a fairly major problem for me.
Indeed, I do precisely that.
--Steve Bellovin, http://www.cs.columbia.edu/~smb
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