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Re: CVS commit: src/sys/kern
On Wed, Sep 24, 2008 at 01:19:43PM -0500, David Young wrote:
> On Wed, Sep 24, 2008 at 01:46:34PM -0400, Thor Lancelot Simon wrote:
> > 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.
> Your application sounds similar to mine. I gave up remounting a
> read-write filesystem read-only long, long ago, because if I created or
> deleted and re-created as few as one or two files, remounted read-only,
> and rebooted shortly thereafter, the filesystem had lost the most
> recently created files. I have probably annotated the problem report
> with that information.
When is "long, long ago"? We have not updated our sources from the NetBSD trunk
in about three months, but I haven't seen any sign of this problem. One
may be that our configuration information is stored in a "repository" file and
extracted back into a mounted-on-top memory filesystem early in boot; when we
read-write, typically the only file we update is the repository, after which we
it and sync the filesystem before remounting r/o.
Unfortunately the change in question makes that impossible...
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