linux-kernel - Re: [Patch] VFS : mount lock scalability for files systems without mount point (WAS vfsmount lock issues on very large ppc64 box)

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Message-ID: <1311660013.2996.6.camel@edumazet-laptop>
Date:	Tue, 26 Jul 2011 08:00:13 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Tim Chen <tim.c.chen@...ux.intel.com>
Cc:	Al Viro <viro@...IV.linux.org.uk>,
	Christoph Hellwig <hch@...radead.org>,
	Andi Kleen <andi@...stfloor.org>,
	Matthew Wilcox <matthew@....cx>,
	Anton Blanchard <anton@...ba.org>, npiggin@...nel.dk,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [Patch] VFS : mount lock scalability for files systems without
 mount point   (WAS vfsmount lock issues on very large ppc64 box)

Le lundi 25 juillet 2011 à 16:22 -0700, Tim Chen a écrit :
> On Mon, 2011-07-25 at 23:51 +0100, Al Viro wrote:
> 
> > It's mostly merged in mainline already...  BTW, you forgot to export
> > that sucker - mtdchar can be modular.
> 
> Thanks for fixing it up and merging it.
> 

Next step is to not chain pipes/sockets into superblock s_inodes list

inode_sb_list_add()/inode_sb_list_del() is the very last contention
point because of spin_lock(&inode_sb_list_lock);



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