From: John Hubbard <jhubbard@nvidia.com>
To: David Hildenbrand <david@redhat.com>, Yan Zhao <yan.y.zhao@intel.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, pbonzini@redhat.com, seanjc@google.com,
mike.kravetz@oracle.com, apopple@nvidia.com, jgg@nvidia.com,
rppt@kernel.org, akpm@linux-foundation.org, kevin.tian@intel.com,
Mel Gorman <mgorman@techsingularity.net>
Subject: Re: [RFC PATCH v2 0/5] Reduce NUMA balance caused TLB-shootdowns in a VM
Date: Wed, 16 Aug 2023 11:00:36 -0700 [thread overview]
Message-ID: <37325c27-223d-400d-bd86-34bdbfb92a5f@nvidia.com> (raw)
In-Reply-To: <ded3c4dc-2df9-2ef2-add0-c17f0cdfaf32@redhat.com>
On 8/16/23 02:49, David Hildenbrand wrote:
> But do 32bit architectures even care about NUMA hinting? If not, just
> ignore them ...
Probably not!
...
>> So, do you mean that let kernel provide a per-VMA allow/disallow
>> mechanism, and
>> it's up to the user space to choose between per-VMA and complex way or
>> global and simpler way?
>
> QEMU could do either way. The question would be if a per-vma settings
> makes sense for NUMA hinting.
From our experience with compute on GPUs, a per-mm setting would suffice.
No need to go all the way to VMA granularity.
thanks,
--
John Hubbard
NVIDIA
next prev parent reply other threads:[~2023-08-16 18:00 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-10 8:56 Yan Zhao
2023-08-10 8:57 ` [RFC PATCH v2 1/5] mm/mmu_notifier: introduce a new mmu notifier flag MMU_NOTIFIER_RANGE_NUMA Yan Zhao
2023-08-10 8:58 ` [RFC PATCH v2 2/5] mm: don't set PROT_NONE to maybe-dma-pinned pages for NUMA-migrate purpose Yan Zhao
2023-08-10 9:00 ` [RFC PATCH v2 3/5] mm/mmu_notifier: introduce a new callback .numa_protect Yan Zhao
2023-08-10 9:00 ` [RFC PATCH v2 4/5] mm/autonuma: call .numa_protect() when page is protected for NUMA migrate Yan Zhao
2023-08-11 18:52 ` Nadav Amit
2023-08-14 7:52 ` Yan Zhao
2023-08-10 9:02 ` [RFC PATCH v2 5/5] KVM: Unmap pages only when it's indeed protected for NUMA migration Yan Zhao
2023-08-10 13:16 ` bibo mao
2023-08-11 3:45 ` Yan Zhao
2023-08-11 7:40 ` bibo mao
2023-08-11 8:01 ` Yan Zhao
2023-08-11 17:14 ` Sean Christopherson
2023-08-11 17:18 ` Jason Gunthorpe
2023-08-14 6:52 ` Yan Zhao
2023-08-14 7:44 ` Yan Zhao
2023-08-14 16:40 ` Sean Christopherson
2023-08-15 1:54 ` Yan Zhao
2023-08-15 14:50 ` Sean Christopherson
2023-08-16 2:43 ` bibo mao
2023-08-16 3:44 ` bibo mao
2023-08-16 5:14 ` Yan Zhao
2023-08-16 7:29 ` bibo mao
2023-08-16 7:18 ` Yan Zhao
2023-08-16 7:53 ` bibo mao
2023-08-16 13:39 ` Sean Christopherson
2023-08-10 9:34 ` [RFC PATCH v2 0/5] Reduce NUMA balance caused TLB-shootdowns in a VM David Hildenbrand
2023-08-10 9:50 ` Yan Zhao
2023-08-11 17:25 ` David Hildenbrand
2023-08-11 18:20 ` John Hubbard
2023-08-11 18:39 ` David Hildenbrand
2023-08-11 19:35 ` John Hubbard
2023-08-14 9:09 ` Yan Zhao
2023-08-15 2:34 ` John Hubbard
2023-08-16 7:43 ` David Hildenbrand
2023-08-16 9:06 ` Yan Zhao
2023-08-16 9:49 ` David Hildenbrand
2023-08-16 18:00 ` John Hubbard [this message]
2023-08-17 5:05 ` Yan Zhao
2023-08-17 7:38 ` David Hildenbrand
2023-08-18 0:13 ` Yan Zhao
2023-08-18 2:29 ` John Hubbard
2023-09-04 9:18 ` Yan Zhao
2023-08-15 2:36 ` Yuan Yao
2023-08-15 2:37 ` Yan Zhao
2023-08-10 13:58 ` Chao Gao
2023-08-11 5:22 ` Yan Zhao
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=37325c27-223d-400d-bd86-34bdbfb92a5f@nvidia.com \
--to=jhubbard@nvidia.com \
--cc=akpm@linux-foundation.org \
--cc=apopple@nvidia.com \
--cc=david@redhat.com \
--cc=jgg@nvidia.com \
--cc=kevin.tian@intel.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mgorman@techsingularity.net \
--cc=mike.kravetz@oracle.com \
--cc=pbonzini@redhat.com \
--cc=rppt@kernel.org \
--cc=seanjc@google.com \
--cc=yan.y.zhao@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox