From: Matt Sealey <matt@genesi-usa•com>
To: Gabriel Paubert <paubert@iram•es>
Cc: ppc-dev <linuxppc-dev@ozlabs•org>
Subject: Re: "atomic" 64-bit math on 32-bit ppc's?
Date: Tue, 04 Sep 2007 18:40:09 +0100 [thread overview]
Message-ID: <46DD9879.7040401@genesi-usa.com> (raw)
In-Reply-To: <20070904160206.GA12698@iram.es>
Gabriel Paubert wrote:
> I don't know at all the ZFS code, not any filesystem code for the
> matter. But how many spinlocks would you have to take and release
> per actual disk operation?
I have no idea, but considering the space supported by the filesystem
it's probably a hell of a lot.
It seems like we've solved it; the Solaris ppc-dev repository has an
updated atomic.c which implements a kernel mutex for 64-bit ops. I've
forwarded this on, hopefully it ISN'T a hell of a lot or this is going
to knock filesystem performance on the head for 32-bit ppc :D
Thanks for your help.
--
Matt Sealey <matt@genesi-usa•com>
Genesi, Manager, Developer Relations
next prev parent reply other threads:[~2007-09-04 17:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-04 11:09 "atomic" 64-bit math on 32-bit ppc's? Matt Sealey
2007-09-04 11:39 ` Gabriel Paubert
2007-09-04 12:31 ` Matt Sealey
2007-09-04 16:02 ` Gabriel Paubert
2007-09-04 17:40 ` Matt Sealey [this message]
2007-09-05 1:04 ` David Gibson
2007-09-04 18:48 ` Scott Wood
2007-09-06 13:21 ` Segher Boessenkool
2007-09-06 13:43 ` Scott Wood
2007-09-06 14:09 ` Segher Boessenkool
2007-09-10 20:39 ` Jon Loeliger
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