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Date:   Fri, 12 May 2017 07:04:42 -0700
From:   Andy Lutomirski <>
Cc:     Andrew Lutomirski <>, Jens Axboe <>,
        "" <>,
        Kai-Heng Feng <>,
        linux-nvme <>,
        Christoph Hellwig <>,
        Sagi Grimberg <>,
        Keith Busch <>
Subject: Re: [PATCH] nvme: Change our APST table to be no more aggressive than
 Intel RSTe

On Fri, May 12, 2017 at 6:58 AM,  <> wrote:
>> Some testing reports suggest that this will fix the issues we've
>> seen on Dell laptops.
> It think it also makes sense to revert the quirk that was created based upon the previous aggressiveness of re-entry to PS4 on those machines.  Are you expecting to split that up into a second patch also targeted at 4.11 stable and 4.12, but later after some more testing?

Yes, mostly.  I've written the patch, but I was planning to target it
at 4.12 or 4.13 but not -stable.  It's mostly just a cleanup and has
no real power saving benefit since the RSTe timeouts are so absurdly
conservative that I doubt PS4 will happen in practical usage.  Perhaps
in suspend-to-idle?  (For suspend-to-idle, I suspect we should really
be using D3 instead.  Do we already do that?)

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