linux-ext4 - Re: [RFC PATCH -v2 6/9] ext4: Call journal commit callback without holding j_list

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Message-ID: <20081104173707.GM30291@mit.edu>
Date:	Tue, 4 Nov 2008 12:37:07 -0500
From:	Theodore Tso <tytso@....edu>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	cmm@...ibm.com, sandeen@...hat.com, linux-ext4@...r.kernel.org
Subject: Re: [RFC PATCH -v2 6/9] ext4: Call journal commit callback without
	holding j_list_lock

I suggest adding the following description and to change the prefix to
be jbd2, not ext4, since the change applies 100% to jbd2 code (and so
it could potentially apply to ocfs2 if they decide to use this
callback, for example).

jbd2: Call journal commit callback without holding j_list_lock

Avoid freeing the transaction in __jbd2_journal_drop_transaction() so
the journal commit callback can run without holding j_list_lock, to
avoid lock contention on this spinlock.

						- Ted
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