linux-kernel - Re: [PATCH V4] Allow SysRq emergency thaw to thaw frozen filesystems

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Message-Id: <1233667867.30906.0.camel@norville.austin.ibm.com>
Date:	Tue, 03 Feb 2009 07:31:07 -0600
From:	Dave Kleikamp <shaggy@...ux.vnet.ibm.com>
To:	Jamie Lokier <jamie@...reable.org>
Cc:	Eric Sandeen <sandeen@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	t-sato@...jp.nec.com
Subject: Re: [PATCH V4] Allow SysRq emergency thaw to thaw frozen
 filesystems

On Tue, 2009-02-03 at 11:48 +0000, Jamie Lokier wrote:
> Eric Sandeen wrote:
> > The timeout thaw originally proposed did not get merged, but
> > perhaps something like this would be useful in emergencies.
> > 
> > For example, freeze /path/to/mountpoint may freeze your
> > root filesystem if you forgot that you had that unmounted.
> 
> If you don't have console access, you're just logged in remotely, is
> there a way to do an emergency unthaw from a shell command?

echo j > /proc/sysrq-trigger

Shaggy
-- 
David Kleikamp
IBM Linux Technology Center

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