Date: Fri, 26 Mar 2004 15:48:51 -0800
From: Andrew Morton <akpm@osdl.org>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [EXT3/JBD] Periodic journal flush not enough?
Message-Id: <20040326154851.7a3ad417.akpm@osdl.org>
In-Reply-To: <20040326231958.GA484@gondor.apana.org.au>
References: <20040326231958.GA484@gondor.apana.org.au>
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Herbert Xu <herbert@gondor.apana.org.au> wrote:
>
> I've encountered a problem with the journal flush timer.  The problem
> is that when a filesystem is short on space, relying on a timer-based
> flushing mechanism is no longer adequate.  For example, on my P4 2GHz
> I can trigger an ENOSPC error by doing
> 
> while :; do echo test > a; [ -s a ] || break; rm a; done; echo Out of space
> 
> on an ext3 file system with 12Mb of free space using the usual 5s
> journal flush timer.

I cannot reproduce this.  Please send more details.  Journalling mode,
kernel version, etc.

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