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From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>,
	"Chen, Tim C" <tim.c.chen@intel.com>,
	Ingo Molnar <mingo@redhat.com>, Davidlohr Bueso <dbueso@suse.de>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Jason Low <jason.low2@hp.com>,
	Michel Lespinasse <walken@google.com>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Waiman Long <waiman.long@hp.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: performance delta after VFS i_mutex=>i_rwsem conversion
Date: Tue, 7 Jun 2016 01:58:37 +0100	[thread overview]
Message-ID: <20160607005837.GJ14480@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20160607004058.GH14480@ZenIV.linux.org.uk>

On Tue, Jun 07, 2016 at 01:40:58AM +0100, Al Viro wrote:

> as initial attempt at lockless next_positive(); barriers are probably wrong,
> though...

More than just barriers...  _Absolutely_ untested variant pushed into
vfs.git#untested.dcache_readdir (the last 3 commits in there).  It
compiles, but that's it.

  parent reply	other threads:[~2016-06-07  0:58 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-06 20:00 performance delta after VFS i_mutex=>i_rwsem conversion Dave Hansen
2016-06-06 20:46 ` Linus Torvalds
2016-06-06 21:13   ` Waiman Long
2016-06-06 21:20     ` Linus Torvalds
2016-06-07  3:22       ` Valdis.Kletnieks
2016-06-07 15:22         ` Waiman Long
2016-06-08  8:58     ` Ingo Molnar
2016-06-09 10:25       ` Ingo Molnar
2016-06-09 18:14         ` Dave Hansen
2016-06-09 20:10           ` Chen, Tim C
2016-06-06 21:15   ` Al Viro
2016-06-06 21:46     ` Linus Torvalds
2016-06-06 22:07       ` Al Viro
2016-06-06 23:50         ` Linus Torvalds
2016-06-06 23:59           ` Linus Torvalds
2016-06-07  0:29             ` Linus Torvalds
2016-06-07  0:40           ` Al Viro
2016-06-07  0:44             ` Al Viro
2016-06-07  0:58             ` Al Viro [this message]
2016-06-07  0:58             ` Linus Torvalds
2016-06-07  1:19               ` Al Viro

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