netdev - Re: [patch V2 07/15] powerpc/ps3: Convert half completion to rcuwait

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Date:   Thu, 19 Mar 2020 17:01:01 -0700
From:   Geoff Levand <geoff@...radead.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Christoph Hellwig <hch@...radead.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-usb@...r.kernel.org, linux-pci@...r.kernel.org,
        Oleg Nesterov <oleg@...hat.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Will Deacon <will@...nel.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Logan Gunthorpe <logang@...tatee.com>,
        Ingo Molnar <mingo@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Kurt Schwemmer <kurt.schwemmer@...rosemi.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-wireless@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [patch V2 07/15] powerpc/ps3: Convert half completion to rcuwait

Hi,

On 3/19/20 3:26 AM, Sebastian Andrzej Siewior wrote:
> On 2020-03-19 03:04:59 [-0700], Christoph Hellwig wrote:
>> But I wonder how alive the whole PS3 support is to start with..
> 
> OtherOS can only be used on "old" PS3 which do not have have their
> firmware upgraded past version 3.21, released April 1, 2010 [0].
> It was not possible to install OtherOS on PS3-slim and I don't remember
> if it was a successor or a budget version (but it had lower power
> consumption as per my memory).
> *I* remember from back then that a few universities bought quite a few
> of them and used them as a computation cluster. However, whatever broke
> over the last 10 years is broken.
> 
> [0] https://en.wikipedia.org/wiki/OtherOS
There are still PS3-Linux users out there.  They generally use firmware
and other tools available through the 'hacker' communities that allow
Linux to be run on more than just the 'officially supported' platforms.

Anyway, the change to use rcuwait seems fine if that's needed for the
completion re-work.  I'll try to do some testing with the patch set
next week.

-Geoff