From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Michael Ellerman <mpe@ellerman.id.au>, linuxppc-dev@ozlabs.org
Subject: Re: powerpc/cell: Remove axonram driver
Date: Mon, 29 Jan 2018 15:13:46 +1100 (AEDT) [thread overview]
Message-ID: <3zVGNB6s1Vz9t2c@ozlabs.org> (raw)
In-Reply-To: <1509666992-4649-1-git-send-email-mpe@ellerman.id.au>
On Thu, 2017-11-02 at 23:56:32 UTC, Michael Ellerman wrote:
> The QS21/22 IBM Cell blades had a southbridge chip called Axon. This
> could have DDR DIMMs attached to it, though they were not directly
> usable as RAM, instead they could be used as some sort of buffer, if
> applications were written specifically to use the block device
> provided by the driver.
>
> Although the driver supposedly had direct access support, it was
> apparently never tested (see commit 91117a20245b ("axonram: Fix bug in
> direct_access")).
>
> These machines have not been available for over 5 years, and were
> never widely in use. It seems highly unlikely anyone is using this
> driver.
>
> In general we're happy to leave old drivers in the tree, but because
> DAX is involved this driver is caught up in the ongoing work in that
> area, but none of the DAX folks are able to test it.
>
> So remove the driver, if any one *is* using it, we'll be happy to put
> it back.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Applied to powerpc next.
https://git.kernel.org/powerpc/c/1d65b1c886be6111f2347bd1a548be
cheers
prev parent reply other threads:[~2018-01-29 4:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-02 23:56 [PATCH] powerpc/cell: Remove axonram driver Michael Ellerman
2018-01-29 4:13 ` Michael Ellerman [this message]
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