linux-ext4 - Re: [PATCH] ext4: Don't use 'struct dentry' for internal lookups

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Message-ID: <20080921201708.GA29476@infradead.org>
Date:	Sun, 21 Sep 2008 16:17:08 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Theodore Ts'o <tytso@....edu>
Cc:	linux-ext4@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	viro@...iv.linux.org.uk
Subject: Re: [PATCH] ext4: Don't use 'struct dentry' for internal lookups

On Sat, Sep 20, 2008 at 10:30:47PM -0400, Theodore Ts'o wrote:
> This is a port of a patch from Linus which fixes a 200+ byte stack
> usage problem in ext4_get_parent().
> 
> It's more efficient to pass down only the actual parts of the dentry
> that matter: the parent inode and the name, instead of allocating a
> struct dentry on the stack.

Al had a variant of this in the vfs queue for a while.

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