From: Hanjun Guo <guohanjun@huawei.com>
To: Robert Richter <robert.richter@caviumnetworks.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com>,
Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
Shannon Zhao <shannon.zhao@linaro.org>,
Steve Capper <steve.capper@linaro.org>,
Mark Rutland <mark.rutland@arm.com>,
Hanjun Guo <hanjun.guo@linaro.org>
Subject: Re: [PATCH v3 12/12] acpi, numa: reuse acpi_numa_memory_affinity_init()
Date: Thu, 28 Jan 2016 10:48:37 +0800 [thread overview]
Message-ID: <56A98185.4080202@huawei.com> (raw)
In-Reply-To: <20160127141847.GR24726@rric.localdomain>
On 2016/1/27 22:18, Robert Richter wrote:
> On 27.01.16 14:15:06, Hanjun Guo wrote:
>> Hi Robert,
>>
>> On 2016/1/25 18:26, Robert Richter wrote:
>>> On 23.01.16 17:39:27, Hanjun Guo wrote:
>>>> From: Hanjun Guo <hanjun.guo@linaro.org>
>>>>
>>>> After the cleanup for acpi_numa_memory_affinity_init(),
>>>> it can be used for architetures both x86 and arm64, since
>>>> CONFIG_MEMORY_HOTPLUG is not enabled for arm64, so no
>>>> worry about that.
>>>>
>>>> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
>>>> ---
>>>> arch/arm64/kernel/acpi_numa.c | 42 -------------------------------
>>>> arch/x86/mm/srat.c | 54 ----------------------------------------
>>>> drivers/acpi/numa.c | 57 +++++++++++++++++++++++++++++++++++++++++++
>>>> 3 files changed, 57 insertions(+), 96 deletions(-)
>>> This one reverts acpi_numa_memory_affinity_init() to the x86 version.
>>> I rather would prefer the arm64 version for the generic code. We could
>>> keep the x86 implementation until x86 maintainers agree to remove them
>>> and use the generic one (implemented in a separate patch).
>>>
>>> Doing so we can move acpi_numa_memory_affinity_init() from the
>>> beginning to generic code (used for arm64) and have this last patch to
>>> remove the x86 version.
>> I think the x86 version is the generic one, all the flags (ACPI_SRAT_MEM_HOT_PLUGGABLE and
>> etc) are defined in the ACPI spec, x86 just use all the flags because it support such features.
>> For ARM64, firmware should be careful and represent the true platform configuration to
>> OS, such as on ARM64, we can't set hotpluggable flag as the ARM64 arch don't support
>> memory hot-plug yet (also the firmware don't support it too), if firmware do things right,
>> it will be not worries for the kernel.
> But you are removing all arm64 from your first patches. Why do you
> introduce acpi_numa_memory_affinity_init() in the beginning to remove
> it in the end again? I esp. like the arm64 version because of its
> direct returns. So I still would like to see generic code for arm64
> from the beginning. Maybe have a copy of x86 initially and make
> modifications for arm64 to it, or move missing code (hotplug, etc.)
> from x86 to generic and remove x86 arch code with the last patch.
OK, so that's the logic and ordering of formatting the patch set, it's easy
to fix :)
I will introduce the generic code for acpi_numa_memory_affinity_init()
in drivers/acpi/numa.c and mark it as __weak from the beginning, and
move missing code from x86 to generic, then remove x86 one as you
suggested, is that OK?
Thanks
Hanjun
next prev parent reply other threads:[~2016-01-28 2:49 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-23 9:39 [PATCH v3 00/12] ACPI NUMA support for ARM64 Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 01/12] acpi, numa: Use pr_fmt() instead of printk Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 02/12] acpi, numa: Replace ACPI_DEBUG_PRINT() with pr_debug() Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 03/12] acpi, numa: remove duplicate NULL check Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 04/12] acpi, numa: introduce ACPI_HAS_NUMA_ARCH_FIXUP Hanjun Guo
2016-01-23 10:25 ` Robert Richter
2016-01-24 4:56 ` Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 05/12] arm64, acpi, numa: NUMA support based on SRAT and SLIT Hanjun Guo
2016-01-25 10:21 ` Robert Richter
2016-01-27 7:12 ` Hanjun Guo
2016-01-27 14:01 ` Robert Richter
2016-01-28 3:16 ` Hanjun Guo
2016-02-01 18:09 ` Robert Richter
2016-02-02 11:30 ` Hanjun Guo
2016-02-02 17:00 ` Lorenzo Pieralisi
2016-03-02 14:10 ` Matthias Brugger
2016-03-02 14:10 ` Matthias Brugger
2016-03-02 14:08 ` Matthias Brugger
2016-03-10 9:50 ` Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 06/12] acpi, numa: Enable ACPI based NUMA on ARM64 Hanjun Guo
2016-01-29 16:37 ` Robert Richter
2016-01-23 9:39 ` [PATCH v3 07/12] acpi, numa: move acpi_numa_slit_init() to common place Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 08/12] arm64, numa: rework numa_add_memblk() Hanjun Guo
2016-01-25 9:34 ` Robert Richter
2016-01-27 6:20 ` Hanjun Guo
2016-03-09 12:27 ` Robert Richter
2016-03-10 10:10 ` Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 09/12] x86, acpi, numa: cleanup acpi_numa_processor_affinity_init() Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 10/12] acpi, numa: move bad_srat() and srat_disabled() to common place Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 11/12] acpi, numa: remove unneeded acpi_numa=1 Hanjun Guo
2016-01-23 9:39 ` [PATCH v3 12/12] acpi, numa: reuse acpi_numa_memory_affinity_init() Hanjun Guo
2016-01-25 10:26 ` Robert Richter
2016-01-27 6:15 ` Hanjun Guo
2016-01-27 14:18 ` Robert Richter
2016-01-28 2:48 ` Hanjun Guo [this message]
2016-01-28 13:31 ` Robert Richter
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