linux-kernel - Re: Add option to passively listen for PCIE hotplug events

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Message-ID: <20081104124706.GB19401@srcf.ucam.org>
Date:	Tue, 4 Nov 2008 12:47:07 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Alan Jenkins <aj504@...york.ac.uk>
Cc:	linux-kernel@...r.kernel.org, linux-testers@...r.kernel.org
Subject: Re: Add option to passively listen for PCIE hotplug events

On Tue, Nov 04, 2008 at 03:29:23AM -0800, Alan Jenkins wrote:

> I've tested pciehp with this patch on my EeePC, which as you say uses
> pcie hotplug to allow power savings when the wireless is not needed.
> Functionally it seems ok.

Hurrah. Progress.

> But resuming from suspend to ram can now take 15-20 seconds.  It seems
> the longer suspend time happens with the device "present"; it's about
> 5 seconds shorter with the device "removed", but still much longer
> than previously.  There's more than one PCIE port, so the rest of the
> delay could be due to other ports which always have devices "present".

Mm. Yeah, a printk with timings would probably be a good plan. I'll do 
some poking at this end and see where the time seems to be being lost.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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