From: Neil Brown <neilb@suse.de>
To: Francois Barre <francois.barre@gmail.com>
Cc: linux-raid <linux-raid@vger.kernel.org>
Subject: Re: Ooops on read-only raid5 while unmounting as xfs
Date: Wed, 24 Jan 2007 10:54:12 +1100 [thread overview]
Message-ID: <17846.40996.525616.51618@notabene.brown> (raw)
In-Reply-To: message from Francois Barre on Tuesday January 23
On Tuesday January 23, francois.barre@gmail.com wrote:
>
> My question is then : what prevents the upper layer to open the array
> read-write, submit a write and make the md code BUG_ON() ?
The theory is that when you tell an md array to become read-only, it
tells the block layer that it is read-only, and then if some process
tries to open it read/write, it gets an array.
I say "theory" because I have never really tested any of the read-only
stuff. I have had a feeling for a long time that it really needs a
bit of thought and testing and documentation, but it never quite
seemed important enough to get that love-and-care....
NeilBrown
next prev parent reply other threads:[~2007-01-23 23:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-18 10:18 Ooops on read-only raid5 while unmounting as xfs Francois Barre
2007-01-23 1:31 ` Neil Brown
2007-01-23 14:42 ` Francois Barre
2007-01-23 23:54 ` Neil Brown [this message]
2007-01-24 22:23 ` Nix
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