linux-kernel - Re: [patch] epoll use a single inode ...

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Message-ID: <Pine.LNX.4.64.0703062312010.10398@alien.or.mcafeemobile.com>
Date:	Tue, 6 Mar 2007 23:15:52 -0800 (PST)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Eric Dumazet <dada1@...mosbay.com>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Avi Kivity <avi@...o.co.il>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...IV.linux.org.uk>
Subject: Re: [patch] epoll use a single inode ...

On Wed, 7 Mar 2007, Eric Dumazet wrote:

> I would definitly *love* saving dentries for pipes (and sockets too), but how
> are you going to get the inode ?

I was not planning to touch anything but epoll, signalfd and timerfd 
files.


> pipes()/sockets() can use read()/write()/rw_verify_area() and thus need
> file->f_path.dentry->d_inode (so each pipe needs a separate dentry)

Currently, they use a single inode, and multiple dentries (to give the 
name of the class). But this could be changed to a single dentry like 
Linus was suggesting. I'll wait for Al's reply before doing anything.
Memory saving can be something, on top of the already big one of avoiding 
code duplication.



- Davide


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