From: Jeff Garzik <jgarzik@pobox.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>,
list linux-ide <linux-ide@vger.kernel.org>
Subject: Re: page fault scalability patch V12 [0/7]: Overview and performance tests
Date: Thu, 02 Dec 2004 02:11:29 -0500 [thread overview]
Message-ID: <41AEC021.8040000@pobox.com> (raw)
In-Reply-To: <1101971149.5593.64.camel@gaston>
Benjamin Herrenschmidt wrote:
> They may not end up in order if they are stores (the stores to the
> taskfile may be out of order vs; the loads/stores to/from the data
> register) unless you have a spinlock protecting both or a full sync (on
> ppc), but then, I don't know the ordering things on x86_64. This could
> certainly be a problem on ppc & ppc64 too.
Is synchronization beyond in[bwl] needed, do you think?
This specific problem is only on Intel ICHx AFAICS, which is PIO not
MMIO and x86-only. I presumed insw() by its very nature already has
synchronization, but perhaps not...
Jeff
next prev parent reply other threads:[~2004-12-02 7:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44.0411221457240.2970-100000@localhost.localdomain>
[not found] ` <Pine.LNX.4.58.0411221343410.22895@schroedinger.engr.sgi.com>
[not found] ` <Pine.LNX.4.58.0411221419440.20993@ppc970.osdl.org>
[not found] ` <Pine.LNX.4.58.0411221424580.22895@schroedinger.engr.sgi.com>
[not found] ` <Pine.LNX.4.58.0411221429050.20993@ppc970.osdl.org>
[not found] ` <Pine.LNX.4.58.0412011539170.5721@schroedinger.engr.sgi.com>
[not found] ` <Pine.LNX.4.58.0412011608500.22796@ppc970.osdl.org>
[not found] ` <41AEB44D.2040805@pobox.com>
[not found] ` <20041201223441.3820fbc0.akpm@osdl.org>
2004-12-02 7:00 ` page fault scalability patch V12 [0/7]: Overview and performance tests Jeff Garzik
2004-12-02 7:05 ` Benjamin Herrenschmidt
2004-12-02 7:11 ` Jeff Garzik [this message]
2004-12-02 11:16 ` Benjamin Herrenschmidt
2004-12-02 14:30 ` Andy Warner
2005-01-06 23:40 ` Jeff Garzik
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=41AEC021.8040000@pobox.com \
--to=jgarzik@pobox.com \
--cc=akpm@osdl.org \
--cc=benh@kernel.crashing.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=torvalds@osdl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).