lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Mon, 13 May 2019 13:21:23 -0700
From:   Doug Anderson <>
To:     Mark Brown <>
Cc:     Benson Leung <>,
        Enric Balletbo i Serra <>,
        "open list:ARM/Rockchip SoC..." <>,
        Nicolas Boichat <>,
        Guenter Roeck <>,
        Brian Norris <>,
        Matthias Kaehlcke <>,
        LKML <>
Subject: Re: [PATCH 4/4] Revert "platform/chrome: cros_ec_spi: Transfer
 messages at high priority"


On Mon, May 13, 2019 at 9:47 AM, Mark Brown <> wrote:

> On Mon, May 13, 2019 at 09:03:28AM -0700, Doug Anderson wrote:
> > On Mon, May 13, 2019 at 9:02 AM Mark Brown <> wrote:
> > > I'm not saying the other changes aren't helping, I'm saying that it's
> > > not clear that this revert is improving things.
> > If I add a call to force the pumping to happen on the SPI thread then
> > the commit I'm reverting here is useless though, isn't it?
> Well, I'm not convinced that that change is ideal anyway and it does
> leave you vulnerable to further changes in the SPI core pushing things
> out to calling context which feels like it isn't going to be helping
> robustness.

OK.  Here's my plan: in v2 I've still included this revert and you can
see how things look.  If you hate it as much as you think you will
then let me know and I'll send a v3 that avoids to forcing and re-adds
the realtime thread to cros_ec.

One note just so you're aware: For my particular device I'm not nearly
as concerned with latency / throughput as I am concerned with
transfers not getting interrupted once started.  I've added this
explicitly in the commit message now, too.  :-)


Powered by blists - more mailing lists