From: David Hildenbrand <david@redhat.com>
To: Christoph Hellwig <hch@infradead.org>, Mike Rapoport <rppt@kernel.org>
Cc: Sudarshan Rajagopalan <sudaraja@codeaurora.org>,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
linux-kernel@vger.kernel.org, Steven Price <steven.price@arm.com>,
Suren Baghdasaryan <surenb@google.com>,
Greg Kroah-Hartman <gregkh@google.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Pratik Patel <pratikp@codeaurora.org>
Subject: Re: mm/memblock: export memblock_{start/end}_of_DRAM
Date: Sat, 31 Oct 2020 11:05:45 +0100 [thread overview]
Message-ID: <db82e52c-0159-777d-8fa9-7b5cf93eca7f@redhat.com> (raw)
In-Reply-To: <20201031091846.GA30512@infradead.org>
On 31.10.20 10:18, Christoph Hellwig wrote:
> On Fri, Oct 30, 2020 at 10:38:42AM +0200, Mike Rapoport wrote:
>>
>> What do you mean by "system memory block"? There could be a lot of
>> interpretations if you take into account memory hotplug, "mem=" option,
>> reserved and firmware memory.
>>
>> I'd suggest you to describe the entire use case in more detail. Having
>> the complete picture would help finding a proper solution.
>
> I think we need the code for the driver trying to do this as an RFC
> submission. Everything else is rather pointless.
Sharing RFCs is most probably not what people want when developing
advanced hypervisor features :)
@Sudarshan, I recommend looking at the slides of the KVM Forum talk from
yesterday
https://kvmforum2020.sched.com/event/eE40/towards-an-alternative-memory-architecture-joao-martins-oracle?iframe=no
It contains a nice summary of the state of art, and how "mem=", devdax,
and dax_hmat can be used to tackle the issue in a hypervisor.
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2020-10-31 10:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 21:29 mm/memblock: export memblock_{start/end}_of_DRAM Sudarshan Rajagopalan
2020-10-30 6:41 ` David Hildenbrand
2020-11-03 2:15 ` Sudarshan Rajagopalan
2020-10-30 8:38 ` Mike Rapoport
2020-10-31 9:18 ` Christoph Hellwig
2020-10-31 10:05 ` David Hildenbrand [this message]
2020-11-03 8:38 ` Christoph Hellwig
2020-11-03 2:51 ` Sudarshan Rajagopalan
2020-11-03 16:51 ` Mike Rapoport
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