linux-kernel - Re: Commit 4257f7e0 ("PCI/ASPM: Save/restore L1SS Capability for suspend/resume") causing hibernate resume failures

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Date:   Wed, 27 Jan 2021 08:00:38 -0800 (PST)
From:   "Kenneth R. Crudup" <kenny@...ix.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
cc:     Vidya Sagar <vidyas@...dia.com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: Commit 4257f7e0 ("PCI/ASPM: Save/restore L1SS Capability for
 suspend/resume") causing hibernate resume failures

On Wed, 27 Jan 2021, Bjorn Helgaas wrote:

> Do you have a URL for your initial report that I could include in the
> revert commit log?

I don't, as I'd emailed the committers first and that was then CCed to the
mailing list, but here's what I'd sent:

----
Date: Fri, 25 Dec 2020 16:38:56
From: Kenneth R. Crudup <kenny@...ix.com>
To: vidyas@...dia.com
Cc: bhelgaas@...gle.com
Subject: Commit 4257f7e0 ("PCI/ASPM: Save/restore L1SS Capability for suspend/resume") causing hibernate resume
    failures

I've been running Linus' master branch on my laptop (Dell XPS 13 2-in-1). With
this commit in place, after resuming from hibernate my machine is essentially
useless, with a torrent of disk I/O errors on my NVMe device (at least, and
possibly other devices affected) until a reboot.

I do use tlp to set the PCIe ASPM to "performance" on AC and "powersupersave"
on battery.

Let me know if you need more information.

        -Kenny

----

-- 
Kenneth R. Crudup  Sr. SW Engineer, Scott County Consulting, Orange County CA