linux-ext4 - Re: [PATCH 01/18] jbd2: Add buffer triggers

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Message-id: <20081211195747.GC3178@webber.adilger.int>
Date:	Thu, 11 Dec 2008 12:57:47 -0700
From:	Andreas Dilger <adilger@....com>
To:	Joel Becker <joel.becker@...cle.com>
Cc:	mfasheh@...e.com, "Theodore Ts'o" <tytso@....edu>,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 01/18] jbd2: Add buffer triggers

On Dec 09, 2008  17:09 -0800, Joel Becker wrote:
> This adds triggers to jbd2 buffer heads.  Just before writing a metadata
> buffer to the journal, jbd2 will optionally call a commit trigger associated
> with the buffer.  If the journal is aborted, an abort trigger will be
> called on any dirty buffers as they are dropped from pending
> transactions.

It would be a useful exercise to see if changing the group descriptor
checksum to use this mechanism.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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