From: David Hildenbrand <david@redhat.com>
To: Anshuman Khandual <anshuman.khandual@arm.com>,
linux-mm@kvack.org, akpm@linux-foundation.org, hca@linux.ibm.com,
catalin.marinas@arm.com
Cc: Oscar Salvador <osalvador@suse.de>,
Vasily Gorbik <gor@linux.ibm.com>, Will Deacon <will@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH V4 0/4] mm/memory_hotplug: Pre-validate the address range with platform
Date: Mon, 25 Jan 2021 10:53:27 +0100 [thread overview]
Message-ID: <fb18a191-4c65-faf8-29ee-780a6c1ab55e@redhat.com> (raw)
In-Reply-To: <8260d6fe-7df5-c667-2514-0d94cf87d31c@arm.com>
On 25.01.21 10:52, Anshuman Khandual wrote:
>
>
> On 1/25/21 2:55 PM, David Hildenbrand wrote:
>> On 25.01.21 03:58, Anshuman Khandual wrote:
>>> This series adds a mechanism allowing platforms to weigh in and prevalidate
>>> incoming address range before proceeding further with the memory hotplug.
>>> This helps prevent potential platform errors for the given address range,
>>> down the hotplug call chain, which inevitably fails the hotplug itself.
>>>
>>> This mechanism was suggested by David Hildenbrand during another discussion
>>> with respect to a memory hotplug fix on arm64 platform.
>>>
>>> https://lore.kernel.org/linux-arm-kernel/1600332402-30123-1-git-send-email-anshuman.khandual@arm.com/
>>>
>>> This mechanism focuses on the addressibility aspect and not [sub] section
>>> alignment aspect. Hence check_hotplug_memory_range() and check_pfn_span()
>>> have been left unchanged. Wondering if all these can still be unified in
>>> an expanded memhp_range_allowed() check, that can be called from multiple
>>> memory hot add and remove paths.
>>>
>>> This series applies on v5.11-rc5 and has been tested on arm64. But only
>>> build tested on s390.
>>>
>>
>> Note that this fails to apply right now to both, -next and Linus' tree.
>> Do you have a branch with he patches on top I can use for a quick test?
>> Thanks
>>
>
> Applied all four patches on v5.11-rc5.
>
> https://gitlab.arm.com/linux-arm/linux-anshuman/-/tree/mm/hotplug_callback/v4/
>
Ah, my fault, they do apply directly on v5.11-rc5 (not sure what I
messed up jumping between branches - thanks!). Will give it a test.
--
Thanks,
David / dhildenb
prev parent reply other threads:[~2021-01-26 5:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-25 2:58 [PATCH V4 0/4] mm/memory_hotplug: Pre-validate the address range with platform Anshuman Khandual
2021-01-25 2:58 ` [PATCH V4 1/4] mm/memory_hotplug: Prevalidate the address range being added " Anshuman Khandual
2021-01-25 9:21 ` David Hildenbrand
2021-01-25 2:58 ` [PATCH V4 2/4] arm64/mm: Define arch_get_mappable_range() Anshuman Khandual
2021-01-25 2:58 ` [PATCH V4 3/4] s390/mm: " Anshuman Khandual
2021-01-25 2:58 ` [PATCH V4 4/4] virtio-mem: check against mhp_get_pluggable_range() which memory we can hotplug Anshuman Khandual
2021-01-25 12:01 ` David Hildenbrand
2021-01-27 3:42 ` Anshuman Khandual
2021-01-25 9:25 ` [PATCH V4 0/4] mm/memory_hotplug: Pre-validate the address range with platform David Hildenbrand
2021-01-25 9:52 ` Anshuman Khandual
2021-01-25 9:53 ` David Hildenbrand [this message]
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