From: Andi Kleen <andi@firstfloor.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Tim Chen <tim.c.chen@linux.intel.com>,
Al Viro <viro@ZenIV.linux.org.uk>,
David Miller <davem@davemloft.net>,
Andi Kleen <andi@firstfloor.org>, Matthew Wilcox <matthew@wil.cx>,
Anton Blanchard <anton@samba.org>,
npiggin@kernel.dk, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH] vfs: avoid taking locks if inode not in lists
Date: Wed, 27 Jul 2011 19:12:12 +0200 [thread overview]
Message-ID: <20110727171212.GZ8006@one.firstfloor.org> (raw)
In-Reply-To: <1311780065.2356.18.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
> Before even taking locks, we can perform an unlocked test to check if
> inode can possibly be in the lists.
>
> On a 2x4x2 machine, a close(socket()) pair can be 200% faster with these
> changes.
Great result! Seems simple and obvious to me.
-Andi
next prev parent reply other threads:[~2011-07-27 17:12 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-17 0:50 vfsmount lock issues on very large ppc64 box Anton Blanchard
2011-07-17 1:04 ` Matthew Wilcox
2011-07-17 8:46 ` Andi Kleen
2011-07-18 8:17 ` Eric Dumazet
2011-07-18 15:40 ` Christoph Hellwig
2011-07-18 15:51 ` Al Viro
2011-07-19 16:32 ` [Patch] VFS : mount lock scalability for files systems without mount point (WAS vfsmount lock issues on very large ppc64 box) Tim Chen
2011-07-21 20:40 ` Al Viro
2011-07-22 0:27 ` Tim Chen
2011-07-23 13:24 ` Christoph Hellwig
2011-07-25 22:39 ` Tim Chen
2011-07-25 22:51 ` Al Viro
2011-07-25 23:22 ` Tim Chen
2011-07-26 6:00 ` Eric Dumazet
2011-07-26 8:21 ` [PATCH] vfs: dont chain pipe/anon/socket on superblock s_inodes list Eric Dumazet
2011-07-26 9:03 ` Christoph Hellwig
2011-07-26 9:36 ` Eric Dumazet
2011-07-26 9:42 ` Christoph Hellwig
2011-07-26 10:43 ` Eric Dumazet
2011-07-26 11:49 ` Christoph Hellwig
2011-07-27 15:21 ` [PATCH] vfs: avoid taking locks if inode not in lists Eric Dumazet
2011-07-27 17:12 ` Andi Kleen [this message]
2011-07-27 20:44 ` Christoph Hellwig
2011-07-27 20:59 ` Andi Kleen
2011-07-27 21:01 ` Christoph Hellwig
2011-07-28 4:11 ` [PATCH] vfs: conditionally call inode_wb_list_del() Eric Dumazet
2011-07-28 4:41 ` [PATCH] vfs: avoid taking locks if inode not in lists Eric Dumazet
2011-07-28 4:55 ` [PATCH] vfs: avoid call to inode_lru_list_del() if possible Eric Dumazet
2011-07-18 16:41 ` vfsmount lock issues on very large ppc64 box Tim Chen
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