From: Andrew Morton <akpm@osdl.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: jamie@shareable.org, viro@math.psu.edu, torvalds@osdl.org,
linux-kernel@vger.kernel.org
Subject: Re: open-scale-2.6.2-A0
Date: Wed, 11 Feb 2004 12:39:14 -0800 [thread overview]
Message-ID: <20040211123914.7372625d.akpm@osdl.org> (raw)
In-Reply-To: <20040211122753.GA15129@elte.hu>
Ingo Molnar <mingo@elte.hu> wrote:
>
>
> * Jamie Lokier <jamie@shareable.org> wrote:
>
> > Ingo Molnar wrote:
> > > i've attached an obvious scalability improvement for write()s. We in
> > > essence used a system-global lock for every open(WRITE) - argh!
> >
> > I wonder if the "rip the second arsehole" is there for a reason.
>
> these days i dont think the comment is justified.
It was kinda funny though.
> > Does this scalability improvement make any measured difference in any
> > conceivable application, or is it just making struct inode larger?
>
> i've not added any new lock, i'm merely reusing the existing ->i_lock.
> So there's no data or code bloat whatsoever.
yes, that's why I called it i_lock and not i_blocks_lock. i_lock's mandate
is "an innermost lock for protecting stuff in the inode". This is an
appropriate use of it.
prev parent reply other threads:[~2004-02-11 20:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-11 11:58 open-scale-2.6.2-A0 Ingo Molnar
2004-02-11 12:20 ` open-scale-2.6.2-A0 Jamie Lokier
2004-02-11 12:27 ` open-scale-2.6.2-A0 Ingo Molnar
2004-02-11 12:45 ` open-scale-2.6.2-A0 Jamie Lokier
2004-02-11 20:39 ` Andrew Morton [this message]
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