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From: Don Porter <porterde@cs.utexas.edu>
To: Theodore Tso <tytso@mit.edu>
Cc: Eric Sandeen <sandeen@redhat.com>, linux-ext4@vger.kernel.org
Subject: Re: ext3 leaking buffer_heads
Date: Wed, 25 Mar 2009 02:04:25 -0500	[thread overview]
Message-ID: <49C9D779.4030805@cs.utexas.edu> (raw)
In-Reply-To: <20090325004609.GF32307@mit.edu>

Theodore Tso wrote:
> The journal is a fixed sized, circular log, so the buffer_head will be
> reused eventually.  In the case of memory pressure the unreferenced
> buffer_head will be freed, but since we never reference the contents
> of the journal, we could be more aggressive about freeing the
> buffer_head just to avoid pushing out more valuable memory contents
> when we start getting put under memory pressure.
>
> 					- Ted
>   

Thanks Ted.  This makes sense.

I am working on a research project that may require more aggressive 
reclaiming of these buffer_heads.  If I were to implement something, 
would this be an optimization the maintainers would be interested in?

Thanks again for the help,

Don

      reply	other threads:[~2009-03-25  7:05 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-23 19:56 ext3 leaking buffer_heads Don Porter
2009-03-23 22:00 ` Eric Sandeen
2009-03-24 22:43   ` Don Porter
2009-03-25  0:46     ` Theodore Tso
2009-03-25  7:04       ` Don Porter [this message]

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