LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Calvin Walton <calvin.walton@gmail.com>
To: Hugo Mills <hugo-lkml@carfax.org.uk>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: Spurious completions during NCQ
Date: Fri, 15 Feb 2008 10:00:00 -0500 [thread overview]
Message-ID: <1203087600.25150.5.camel@zem> (raw)
In-Reply-To: <20080215134658.GB27745@vlad.carfax.org.uk>
On Fri, 2008-02-15 at 13:46 +0000, Hugo Mills wrote:
> I'm getting these on my Dell Latitude D830:
>
> Feb 15 13:06:00 willow kernel: ata1.00: exception Emask 0x2 SAct 0x4 SErr 0x0 action 0x2 frozen
> Feb 15 13:06:00 willow kernel: ata1.00: spurious completions during NCQ issue=0x0 SAct=0x4 FIS=004040a1:00000002
> In some cases, there are several cmd/res lines listed. It's
> happening about once an hour or so (not correlated with any other
> event that I can see). It doesn't seem to be affecting operation of
> the machine, but it's making me nervous.
>
> Can anyone set my mind at rest? (Or suggest a fix?)
You didn't mention which SATA chipset your laptop has, but some quick
googling says that it's AHCI. Until 2.6.24, the AHCI driver has a
problem where it'll report superious NCQ completions due to a bug in the
driver logic.
> uname -a reports:
> Linux willow 2.6.23.1-hrt3 #1 SMP Sun Nov 4 14:51:20 GMT 2007 x86_64 GNU/Linux
The fix is simple, upgrade your kernel to 2.6.24 :)
> It's a kernel.org kernel with the patch for tickless operation on
> amd64.
Handily, the 2.6.24 kernel.org kernel includes amd64 tickless support
already.
--
Calvin Walton <calvin.walton@gmail.com>
next prev parent reply other threads:[~2008-02-15 15:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-15 13:46 Spurious completions during NCQ Hugo Mills
2008-02-15 15:00 ` Calvin Walton [this message]
2008-02-15 15:04 ` Hugo Mills
2008-02-15 15:37 ` Michael Tokarev
2008-02-16 14:08 ` Mark Lord
2008-03-06 5:56 ` Tejun Heo
2008-03-06 6:05 ` Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2007-10-13 13:12 Marco Lamberto
2007-09-07 17:57 Sumanth J.V
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=1203087600.25150.5.camel@zem \
--to=calvin.walton@gmail.com \
--cc=hugo-lkml@carfax.org.uk \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.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).