linux-kernel - Re: [PATCH] vfs: avoid taking locks if inode not in lists

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Message-ID: <20110727210104.GA9066@infradead.org>
Date:	Wed, 27 Jul 2011 17:01:04 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Al Viro <viro@...IV.linux.org.uk>,
	David Miller <davem@...emloft.net>,
	Matthew Wilcox <matthew@....cx>,
	Anton Blanchard <anton@...ba.org>, npiggin@...nel.dk,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] vfs: avoid taking locks if inode not in lists

On Wed, Jul 27, 2011 at 10:59:57PM +0200, Andi Kleen wrote:
> > Btw, I wonder if you should micro-optimize things a bit further by
> > moving the unhashed checks from the deletion functions into the callers
> > and thus save a function call for each of them.
> 
> If the caller is in the same file modern gcc is able to do that automatically
> if you're lucky enough ("partial inlining")
> 
> I would not uglify the code for it.

Depending on how you look at it the code might actually be a tad
cleaner.  One of called functions is outside of inode.c.

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