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Message-ID: <20130709091406.GA20470@amd.pavel.ucw.cz> Date: Tue, 9 Jul 2013 11:14:07 +0200 From: Pavel Machek <pavel@....cz> To: Greg KH <greg@...ah.com> Cc: kernel list <linux-kernel@...r.kernel.org>, joe.lawrence@...atus.com, myron.stowe@...hat.com, bhelgaas@...gle.com Subject: Re: /sys/module/pcie_aspm/parameters/policy not writable? 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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