[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <e9e943910803060319y1f538a68y59bea3fae4b88bb9@mail.gmail.com>
Date: Thu, 6 Mar 2008 11:19:03 +0000
From: "Duane Griffin" <duaneg@...da.com>
To: "Andreas Dilger" <adilger@....com>
Cc: linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
"Theodore Tso" <tytso@....edu>, sct@...hat.com,
akpm@...ux-foundation.org
Subject: Re: [RFC, PATCH 6/6] ext3: do not write to the disk when mounting a dirty read-only filesystem
On 06/03/2008, Andreas Dilger <adilger@....com> wrote:
> On Mar 06, 2008 01:59 +0000, Duane Griffin wrote:
> > NOTE: For now I'm simply preventing filesystems requiring recovery from being
> > remounted read-write. This breaks booting with an uncleanly mounted root
> > filesystem!
>
> I was going to ask about this - not being able to remount rw is a serious
> problem because many users have only the root filesystem and this
> limitation basically prevents this patch from being landable.
Yep, I agree. I wanted to post this as an RFC now to get feedback on
the overall approach. I'll try and get remount support in there ASAP
and post another version.
> I'd suggest if the filesystem is going to be remounted read/write that
> the journal mapping be discarded and the journal replayed. Depending
> on how you do the mapping it may be necessary to invalidate all of the
> pages in the cache so that they don't reference the blocks in the journal.
That was along the lines I was thinking of, too. Thanks for mentioning
invalidating the page cache -- I'll make sure that doesn't get
overlooked.
> Cheers, Andreas
Cheers,
Duane.
--
"I never could learn to drink that blood and call it wine" - Bob Dylan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists