From: Pavel Machek <pavel@ucw.cz>
To: Greg KH <greg@kroah.com>
Cc: kernel list <linux-kernel@vger.kernel.org>,
joe.lawrence@stratus.com, myron.stowe@redhat.com,
bhelgaas@google.com
Subject: Re: /sys/module/pcie_aspm/parameters/policy not writable?
Date: Tue, 9 Jul 2013 11:14:07 +0200 [thread overview]
Message-ID: <20130709091406.GA20470@amd.pavel.ucw.cz> (raw)
In-Reply-To: <20130709041321.GA30555@kroah.com>
Hi!
> > My thinkpad has rather high ping latencies... and perhaps it is due to
> > PCIE ASPM.
>
> Why would that be the problem? The odds that the PCIE bus is the issue
> seems strange to me.
Well, I google a bit. Apparently, the issue is common on x60/t60
machine and was never fixed properly.
And indeed some patches point in that direction, in particular:
https://launchpadlibrarian.net/17463623/e1000e-0.4.1.7.diff
(It is from comment #27 here:
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/42572
).
If you have any idea what else it could be...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2013-07-09 9:14 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-09 1:26 /sys/module/pcie_aspm/parameters/policy not writable? Pavel Machek
2013-07-09 4:13 ` Greg KH
2013-07-09 9:14 ` Pavel Machek [this message]
2013-07-09 9:49 ` Pavel Machek
2013-07-09 10:10 ` Pavel Machek
2013-07-09 16:25 ` Bjorn Helgaas
2013-07-10 13:29 ` Pavel Machek
2013-07-10 19:57 ` Bjorn Helgaas
2013-07-10 22:21 ` Wyborny, Carolyn
2013-07-10 22:57 ` Bjorn Helgaas
2013-07-10 22:57 ` Bjorn Helgaas
2013-07-11 17:45 ` Wyborny, Carolyn
2013-07-11 17:45 ` Wyborny, Carolyn
2013-07-12 11:52 ` Pavel Machek
2013-07-12 11:52 ` Pavel Machek
2013-07-12 11:03 ` Pavel Machek
2013-07-12 11:11 ` Pavel Machek
2013-07-19 17:46 ` Bjorn Helgaas
2013-07-24 15:19 ` Wyborny, Carolyn
2013-07-28 13:51 ` Pavel Machek
2013-08-01 14:55 ` Wyborny, Carolyn
2013-08-01 15:55 ` Wyborny, Carolyn
2013-08-02 0:39 ` Pavel Machek
2013-08-02 14:58 ` Wyborny, Carolyn
2013-07-31 23:53 ` Bjorn Helgaas
2013-08-01 14:57 ` Wyborny, Carolyn
2013-08-01 19:33 ` Bjorn Helgaas
2013-08-01 20:00 ` Pavel Machek
2013-08-01 20:27 ` Bjorn Helgaas
2013-08-02 1:02 ` Pavel Machek
2013-08-02 2:13 ` Pavel Machek
2013-08-02 13:48 ` Bjorn Helgaas
2013-08-01 6:19 ` Jeff Kirsher
2013-07-09 16:37 ` Greg KH
2013-07-09 17:15 ` Pavel Machek
2013-07-10 4:24 ` Robert Hancock
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