From: Sudeep Holla <sudeep.holla@arm.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Jeremy Linton <jeremy.linton@arm.com>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Hanjun Guo <hanjun.guo@linaro.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCH v2 3/3] arm64: disable ACPI PPTT support temporarily
Date: Tue, 5 Jun 2018 16:27:55 +0100 [thread overview]
Message-ID: <a93212e3-7965-9ae2-34b0-407f04590567@arm.com> (raw)
In-Reply-To: <CAJZ5v0hn+sya29bZJzksDEDt2QPZDY36Hwn=ckw3ikTGp7T1Zw@mail.gmail.com>
On 05/06/18 16:02, Rafael J. Wysocki wrote:
> On Tue, Jun 5, 2018 at 4:35 PM, Sudeep Holla <sudeep.holla@arm.com> wrote:
>> Currently, ARM64 doesn't support updating the CPU topology masks on
>> CPU hotplug operations. ACPI PPTT support rely on that missing feature
>> which is technically not incorrect. Instead of reverting all the PPTT
>> support, let's keep it simple and disable ACPI PPTT support on ARM64
>> for time-being until the topology updates are added for CPU hotplug
>> operations.
>
> When is that going to happen?
> > Nobody else uses PPTT now.
>
No we need it on ARM64. I have even the fixes for the original issue
but it's bit invasive and too late as we are already in the merge
window. It needs to be tested on NUMA platforms, I have asked for that
explicitly.
--
Regards,
Sudeep
next prev parent reply other threads:[~2018-06-05 15:28 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-05 14:35 [PATCH v2 1/3] Revert "arm64: topology: divorce MC scheduling domain from core_siblings" Sudeep Holla
2018-06-05 14:35 ` [PATCH v2 2/3] ACPI / PPTT: fix build when CONFIG_ACPI_PPTT is not enabled Sudeep Holla
2018-06-05 15:00 ` Rafael J. Wysocki
2018-06-05 15:33 ` Sudeep Holla
2018-06-05 16:12 ` Rafael J. Wysocki
2018-06-05 16:18 ` Sudeep Holla
2018-06-05 16:20 ` Rafael J. Wysocki
2018-06-05 17:08 ` Catalin Marinas
2018-06-05 14:35 ` [PATCH v2 3/3] arm64: disable ACPI PPTT support temporarily Sudeep Holla
2018-06-05 15:02 ` Rafael J. Wysocki
2018-06-05 15:27 ` Sudeep Holla [this message]
2018-06-05 16:38 ` Jeremy Linton
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