From: David Hildenbrand <david@redhat.com>
To: Pasha Tatashin <pasha.tatashin@soleen.com>,
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Subject: Re: [PATCH 2/2] mm: keep nid around during hot-remove
Date: Wed, 7 Aug 2024 13:32:12 +0200 [thread overview]
Message-ID: <345ba221-e094-47e8-9481-562faf4acd85@redhat.com> (raw)
In-Reply-To: <20240806221454.1971755-2-pasha.tatashin@soleen.com>
On 07.08.24 00:14, Pasha Tatashin wrote:
> nid is needed during memory hot-remove in order to account the
> information about the memmap overhead that is being removed.
>
> In addition, we cannot use page_pgdat(pfn_to_page(pfn)) during
> hotremove after remove_pfn_range_from_zone().
>
> We also cannot determine nid from walking through memblocks after
> remove_memory_block_devices() is called.
>
> Therefore, pass nid down from the beginning of hotremove to where
> it is used for the accounting purposes.
I was happy to finally remove that nid parameter for good in:
commit 65a2aa5f482ed0c1b5afb9e6b0b9e0b16bb8b616
Author: David Hildenbrand <david@redhat.com>
Date: Tue Sep 7 19:55:04 2021 -0700
mm/memory_hotplug: remove nid parameter from arch_remove_memory()
To ask the real question: Do we really need this counter per-nid at all?
Seems to over-complicate things.
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2024-08-07 11:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-06 22:14 [PATCH 1/2] mm: update the memmap stat before page is freed Pasha Tatashin
2024-08-06 22:14 ` [PATCH 2/2] mm: keep nid around during hot-remove Pasha Tatashin
2024-08-07 11:32 ` David Hildenbrand [this message]
2024-08-07 11:50 ` David Hildenbrand
2024-08-07 14:40 ` Pasha Tatashin
2024-08-07 15:23 ` David Hildenbrand
2024-08-07 11:24 ` [PATCH 1/2] mm: update the memmap stat before page is freed David Hildenbrand
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