From: Lance Yang <lance.yang@linux.dev>
To: songmuchun@bytedance.com
Cc: osalvador@suse.de, akpm@linux-foundation.org, rppt@kernel.org,
qi.zheng@linux.dev, lance.yang@linux.dev, jthoughton@google.com,
david@kernel.org, muchun.song@linux.dev, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 04/12] mm: hugetlb_vmemmap: generalize vmemmap page allocation
Date: Thu, 22 Oct 2026 21:54:55 +0800 [thread overview]
Message-ID: <20261022135455.90168-1-lance.yang@linux.dev> (raw)
In-Reply-To: <20261020115824.823278-3-songmuchun@bytedance.com>
On Tue, Oct 20, 2026 at 07:58:16PM +0800, Muchun Song wrote:
>Vmemmap page allocation is currently tied to restoring a virtual range
>and assumes an empty destination list. These constraints prevent it from
>being reused when pages are requested independently of a vmemmap range or
>appended to an existing list.
Yeah, the local list makes sense to me :)
>Generalize the allocator and give it an all-or-nothing list contract so
>the restore and optimization paths can share the same allocation policy.
>This also allows HVO head-page allocation to fail gracefully under memory
>pressure without triggering the OOM killer.
And __GFP_RETRY_MAYFAIL for the head page seems reasonable too. Just skip
the optimization if we can't allocate it.
>Signed-off-by: Muchun Song <songmuchun@bytedance.com>
>---
Reviewed-by: Lance Yang <lance.yang@linux.dev>
next prev parent reply other threads:[~2026-10-22 13:55 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-20 11:52 [PATCH 00/12] mm: Decouple folio-based vmemmap optimization from HugeTLB Muchun Song
2026-10-20 11:52 ` [PATCH 01/12] mm: hugetlb_vmemmap: remove HugeTLB-specific vmemmap optimization macros Muchun Song
2026-10-22 3:43 ` Lance Yang
2026-10-20 11:58 ` [PATCH 02/12] mm: hugetlb_vmemmap: unify VMEMMAP_{SPLIT,REMAP}_NO_TLB_FLUSH Muchun Song
2026-10-20 11:58 ` [PATCH 03/12] mm: hugetlb_vmemmap: simplify vmemmap head page handling Muchun Song
2026-10-22 6:24 ` Lance Yang
2026-10-22 6:27 ` Muchun Song
2026-10-22 7:23 ` Lance Yang
2026-10-20 11:58 ` [PATCH 04/12] mm: hugetlb_vmemmap: generalize vmemmap page allocation Muchun Song
2026-10-22 13:54 ` Lance Yang [this message]
2026-10-20 11:58 ` [PATCH 05/12] mm: hugetlb_vmemmap: unify writable vmemmap page preparation Muchun Song
2026-10-22 14:13 ` Lance Yang
2026-10-20 11:58 ` [PATCH 06/12] mm: hugetlb_vmemmap: rename vmemmap_remap_pte() to vmemmap_optimize_pte() Muchun Song
2026-10-23 0:55 ` Lance Yang
2026-10-20 11:58 ` [PATCH 07/12] mm: hugetlb_vmemmap: simplify shared tail page handling Muchun Song
2026-10-23 2:20 ` Lance Yang
2026-10-23 2:32 ` Muchun Song
2026-10-20 11:58 ` [PATCH 08/12] mm: hugetlb_vmemmap: move alloc_vmemmap_page_list() next to its free helper Muchun Song
2026-10-23 2:47 ` Lance Yang
2026-10-20 11:58 ` [PATCH 09/12] mm: hugetlb_vmemmap: make vmemmap optimization folio-oriented Muchun Song
2026-10-23 3:39 ` Lance Yang
2026-10-20 11:58 ` [PATCH 10/12] mm: hugetlb_vmemmap: make vmemmap restoration folio-oriented Muchun Song
2026-10-23 3:46 ` Lance Yang
2026-10-23 3:58 ` Muchun Song
2026-10-20 11:58 ` [PATCH 11/12] mm: hugetlb_vmemmap: unify vmemmap range restoration Muchun Song
2026-10-23 3:53 ` Lance Yang
2026-10-20 11:58 ` [PATCH 12/12] mm: hugetlb_vmemmap: make vmemmap PTE conversion folio-oriented Muchun Song
2026-10-23 7:33 ` Lance Yang
2026-10-22 3:52 ` [PATCH 02/12] mm: hugetlb_vmemmap: unify VMEMMAP_{SPLIT,REMAP}_NO_TLB_FLUSH Lance Yang
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=20261022135455.90168-1-lance.yang@linux.dev \
--to=lance.yang@linux.dev \
--cc=akpm@linux-foundation.org \
--cc=david@kernel.org \
--cc=jthoughton@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=muchun.song@linux.dev \
--cc=osalvador@suse.de \
--cc=qi.zheng@linux.dev \
--cc=rppt@kernel.org \
--cc=songmuchun@bytedance.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.