From: Andrew Morton <akpm@linux-foundation.org>
To: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Nico Pache <npache@redhat.com>,
linux-mm@kvack.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
david@redhat.com, ziy@nvidia.com, lorenzo.stoakes@oracle.com,
Liam.Howlett@oracle.com, ryan.roberts@arm.com, dev.jain@arm.com,
corbet@lwn.net, rostedt@goodmis.org, mhiramat@kernel.org,
mathieu.desnoyers@efficios.com, baohua@kernel.org,
willy@infradead.org, peterx@redhat.com,
wangkefeng.wang@huawei.com, usamaarif642@gmail.com,
sunnanyong@huawei.com, vishal.moola@gmail.com,
thomas.hellstrom@linux.intel.com, yang@os.amperecomputing.com,
kirill.shutemov@linux.intel.com, aarcange@redhat.com,
raquini@redhat.com, anshuman.khandual@arm.com,
catalin.marinas@arm.com, tiwai@suse.de, will@kernel.org,
dave.hansen@linux.intel.com, jack@suse.cz, cl@gentwo.org,
jglisse@google.com, surenb@google.com, zokeefe@google.com,
hannes@cmpxchg.org, rientjes@google.com, mhocko@suse.com,
rdunlap@infradead.org
Subject: Re: [PATCH v8 11/15] khugepaged: allow madvise_collapse to check all anonymous mTHP orders
Date: Fri, 4 Jul 2025 14:14:22 -0700 [thread overview]
Message-ID: <20250704141422.359c89146ad69512b9be4902@linux-foundation.org> (raw)
In-Reply-To: <2f6d9541-8083-4d3c-a9c1-cba0d5bf98a0@linux.alibaba.com>
On Fri, 4 Jul 2025 14:11:13 +0800 Baolin Wang <baolin.wang@linux.alibaba.com> wrote:
> On 2025/7/2 13:57, Nico Pache wrote:
> > Allow madvise_collapse to scan/collapse all mTHP orders without the
> > strict requirement of needing the PMD-order enabled.
> >
> > Signed-off-by: Nico Pache <npache@redhat.com>
>
> I am afraid we should drop this patch from the series, since Hugh
> explicitly opposed my modification of the madvise_collapse control logic
> in this thread[1].
Well it drops easily enough. I don't know if it compiles yet.
Nico, can you confirm that you're OK with the droppage and that the
series is still good without this patch?
> Moreover, since we have not yet clarified how to handle the conflict
> between the semantics of madvise_collapse and the THP interfaces, we
> should keep the current logic[2] (means madvise_collapse still only
> allows PMD collapse).
>
> If madvise_collapse is to support mTHP collapse, there will be more
> semantic conflicts to discuss.
>
> [1]
> https://lore.kernel.org/all/cover.1750815384.git.baolin.wang@linux.alibaba.com/
> [2]
> https://lore.kernel.org/all/23b8ad10-cd1f-45df-a25c-78d01c8af44f@redhat.com/
next prev parent reply other threads:[~2025-07-04 21:14 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-02 5:57 [PATCH v8 00/15] khugepaged: mTHP support Nico Pache
2025-07-02 5:57 ` [PATCH v8 01/15] khugepaged: rename hpage_collapse_* to khugepaged_* Nico Pache
2025-07-04 5:14 ` Dev Jain
2025-07-08 4:35 ` Nico Pache
2025-07-08 15:57 ` David Hildenbrand
2025-07-08 16:23 ` Lorenzo Stoakes
2025-07-02 5:57 ` [PATCH v8 02/15] introduce khugepaged_collapse_single_pmd to unify khugepaged and madvise_collapse Nico Pache
2025-07-04 3:50 ` Baolin Wang
2025-07-04 4:20 ` Nico Pache
2025-07-04 5:51 ` Baolin Wang
2025-07-02 5:57 ` [PATCH v8 03/15] khugepaged: generalize hugepage_vma_revalidate for mTHP support Nico Pache
2025-07-02 5:57 ` [PATCH v8 04/15] khugepaged: generalize alloc_charge_folio() Nico Pache
2025-07-08 6:19 ` Baolin Wang
2025-07-02 5:57 ` [PATCH v8 05/15] khugepaged: generalize __collapse_huge_page_* for mTHP support Nico Pache
2025-07-02 5:57 ` [PATCH v8 06/15] khugepaged: introduce khugepaged_scan_bitmap " Nico Pache
2025-07-02 5:57 ` [PATCH v8 07/15] khugepaged: add " Nico Pache
2025-07-02 5:57 ` [PATCH v8 08/15] khugepaged: skip collapsing mTHP to smaller orders Nico Pache
2025-07-02 5:57 ` [PATCH v8 09/15] khugepaged: avoid unnecessary mTHP collapse attempts Nico Pache
2025-07-02 5:57 ` [PATCH v8 10/15] khugepaged: allow khugepaged to check all anonymous mTHP orders Nico Pache
2025-07-02 5:57 ` [PATCH v8 11/15] khugepaged: allow madvise_collapse " Nico Pache
2025-07-04 6:11 ` Baolin Wang
2025-07-04 21:14 ` Andrew Morton [this message]
2025-07-08 4:37 ` Nico Pache
2025-07-08 6:15 ` Baolin Wang
2025-07-02 5:57 ` [PATCH v8 12/15] khugepaged: kick khugepaged for enabling none-PMD-sized mTHPs Nico Pache
2025-07-02 5:57 ` [PATCH v8 13/15] khugepaged: improve tracepoints for mTHP orders Nico Pache
2025-07-02 5:57 ` [PATCH v8 14/15] khugepaged: add per-order mTHP khugepaged stats Nico Pache
2025-07-08 6:09 ` Baolin Wang
2025-07-11 5:19 ` Nico Pache
2025-07-02 5:57 ` [PATCH v8 15/15] Documentation: mm: update the admin guide for mTHP collapse Nico Pache
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=20250704141422.359c89146ad69512b9be4902@linux-foundation.org \
--to=akpm@linux-foundation.org \
--cc=Liam.Howlett@oracle.com \
--cc=aarcange@redhat.com \
--cc=anshuman.khandual@arm.com \
--cc=baohua@kernel.org \
--cc=baolin.wang@linux.alibaba.com \
--cc=catalin.marinas@arm.com \
--cc=cl@gentwo.org \
--cc=corbet@lwn.net \
--cc=dave.hansen@linux.intel.com \
--cc=david@redhat.com \
--cc=dev.jain@arm.com \
--cc=hannes@cmpxchg.org \
--cc=jack@suse.cz \
--cc=jglisse@google.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=lorenzo.stoakes@oracle.com \
--cc=mathieu.desnoyers@efficios.com \
--cc=mhiramat@kernel.org \
--cc=mhocko@suse.com \
--cc=npache@redhat.com \
--cc=peterx@redhat.com \
--cc=raquini@redhat.com \
--cc=rdunlap@infradead.org \
--cc=rientjes@google.com \
--cc=rostedt@goodmis.org \
--cc=ryan.roberts@arm.com \
--cc=sunnanyong@huawei.com \
--cc=surenb@google.com \
--cc=thomas.hellstrom@linux.intel.com \
--cc=tiwai@suse.de \
--cc=usamaarif642@gmail.com \
--cc=vishal.moola@gmail.com \
--cc=wangkefeng.wang@huawei.com \
--cc=will@kernel.org \
--cc=willy@infradead.org \
--cc=yang@os.amperecomputing.com \
--cc=ziy@nvidia.com \
--cc=zokeefe@google.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
all inboxes | Powered by JetHome®