From: David Gibson <david@gibson.dropbear.id.au>
To: "Cédric Le Goater" <clg@kaod.org>
Cc: linuxppc-dev@lists.ozlabs.org,
Michael Ellerman <mpe@ellerman.id.au>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH 0/2] powerpc/xive: fix CPU hot unplug
Date: Tue, 3 Oct 2017 14:36:15 +1100 [thread overview]
Message-ID: <20171003033615.GA3260@umbus.fritz.box> (raw)
In-Reply-To: <378a1945-6263-dca7-3912-b4a2c61794b8@kaod.org>
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On Mon, Oct 02, 2017 at 06:27:20PM +0200, Cédric Le Goater wrote:
> On 09/23/2017 10:26 AM, Cédric Le Goater wrote:
> > Hi,
> >
> > Here are a couple of small fixes to support CPU hot unplug. There are
> > still some issues to be investigated as, in some occasions, after a
> > couple of plug and unplug, the cpu which was removed receives a 'lost'
> > interrupt. This showed to be the decrementer under QEMU.
>
> So this seems to be a QEMU issue only which can be solved by
> removing the DEE bit from the LPCR on P9 processor when the CPU
> is stopped in rtas. PECE3 bit on P8 processors.
>
> I think these patches are valuable fixes for 4.14. The first
> is trivial and the second touches the common xive part but it
> is only called on the pseries platform.
>
> Could you please take a look ?
Sorry, I think I've missed something here.
Is there a qemu bug involved in this? Has there been a patch sent
that I didn't spot?
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2017-10-03 4:26 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-23 8:26 [PATCH 0/2] powerpc/xive: fix CPU hot unplug Cédric Le Goater
2017-09-23 8:26 ` [PATCH 1/2] powerpc/xive: fix IPI reset Cédric Le Goater
2017-09-23 8:26 ` [PATCH 2/2] powerpc/xive: fix cpu removal Cédric Le Goater
2017-10-02 16:27 ` [PATCH 0/2] powerpc/xive: fix CPU hot unplug Cédric Le Goater
2017-10-02 16:52 ` Benjamin Herrenschmidt
2017-10-02 17:53 ` Cédric Le Goater
2017-10-03 3:36 ` David Gibson [this message]
2017-10-03 6:24 ` Cédric Le Goater
2017-10-03 6:58 ` David Gibson
2017-10-03 8:22 ` Benjamin Herrenschmidt
2017-10-04 14:48 ` Cédric Le Goater
2017-10-05 3:29 ` Nikunj A Dadhania
2017-10-05 8:18 ` Cédric Le Goater
2017-10-03 11:23 ` Michael Ellerman
2017-10-03 12:58 ` Cédric Le Goater
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