From: "Luck, Tony" <tony.luck@intel.com>
To: Jiaqi Yan <jiaqiyan@google.com>
Cc: David Hildenbrand <david@redhat.com>,
Kyle Meyer <kyle.meyer@hpe.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
<akpm@linux-foundation.org>, <corbet@lwn.net>,
<linmiaohe@huawei.com>, <shuah@kernel.org>, <jane.chu@oracle.com>,
<Liam.Howlett@oracle.com>, <bp@alien8.de>, <hannes@cmpxchg.org>,
<jack@suse.cz>, <joel.granados@kernel.org>,
<laoar.shao@gmail.com>, <lorenzo.stoakes@oracle.com>,
<mclapinski@google.com>, <mhocko@suse.com>,
<nao.horiguchi@gmail.com>, <osalvador@suse.de>,
<rafael.j.wysocki@intel.com>, <rppt@kernel.org>,
<russ.anderson@hpe.com>, <shawn.fan@intel.com>,
<surenb@google.com>, <vbabka@suse.cz>,
<linux-acpi@vger.kernel.org>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-kselftest@vger.kernel.org>,
<linux-mm@kvack.org>
Subject: Re: [PATCH v2] mm/memory-failure: Support disabling soft offline for HugeTLB pages
Date: Wed, 17 Sep 2025 12:54:09 -0700 [thread overview]
Message-ID: <aMsR4Tr9ov1pfucC@agluck-desk3> (raw)
In-Reply-To: <CACw3F52p45t3iSZPjx_Lq9kBn1ZGTDZsxk+iQ-xFA1zdvdqqrw@mail.gmail.com>
On Wed, Sep 17, 2025 at 12:32:47PM -0700, Jiaqi Yan wrote:
> +1. Given /proc/sys/vm/enable_soft_offline is extensible, I would
> prefer a compact userspace API.
>
> > would create a new file, and the file has weird semantics such that it
> > has no meaning when enable_soft_offline=0.
So the expand the bitmask idea from earlier in this thread?
Bit0 0 = soft offline disabled. 1 = Enabled (but see other bits)
Bit1 0 = allow offline of 4K pages, 1 = suppress 4K offline
Bit2 0 = allow offline of hugetlb, 1 = suppress hugetlb offline
Bit3 0 = allow breakup of transparent huge pages to just offline 4K, 1 = suppress transparent breakup
Bit4+ Reserved for suppressing other page types we invent in the future
Values 0 and 1 keep their original meaning.
Value 5 means: offline 4K, keep hugetlb, breakup transparent huge pages.
-Tony
next prev parent reply other threads:[~2025-09-17 19:54 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-16 0:27 [PATCH v2] mm/memory-failure: Support disabling soft offline for HugeTLB pages Kyle Meyer
2025-09-16 3:16 ` Andrew Morton
2025-09-16 7:14 ` Kyle Meyer
2025-09-16 15:20 ` Luck, Tony
2025-09-16 17:59 ` Kyle Meyer
2025-09-16 18:08 ` Luck, Tony
2025-09-17 6:35 ` Fan, Shawn
2025-09-17 18:59 ` Kyle Meyer
2025-09-18 8:34 ` Shuai Xue
2025-09-18 15:48 ` Jiaqi Yan
2025-09-16 10:12 ` Anshuman Khandual
2025-09-17 7:02 ` David Hildenbrand
2025-09-17 18:51 ` Kyle Meyer
2025-09-17 19:05 ` David Hildenbrand
2025-09-17 19:32 ` Jiaqi Yan
2025-09-17 19:54 ` Luck, Tony [this message]
2025-09-17 21:39 ` Kyle Meyer
2025-09-17 22:15 ` Jiaqi Yan
2025-09-21 11:36 ` Anshuman Khandual
2025-09-23 6:03 ` Kyle Meyer
2025-09-21 11:25 ` Anshuman Khandual
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=aMsR4Tr9ov1pfucC@agluck-desk3 \
--to=tony.luck@intel.com \
--cc=Liam.Howlett@oracle.com \
--cc=akpm@linux-foundation.org \
--cc=anshuman.khandual@arm.com \
--cc=bp@alien8.de \
--cc=corbet@lwn.net \
--cc=david@redhat.com \
--cc=hannes@cmpxchg.org \
--cc=jack@suse.cz \
--cc=jane.chu@oracle.com \
--cc=jiaqiyan@google.com \
--cc=joel.granados@kernel.org \
--cc=kyle.meyer@hpe.com \
--cc=laoar.shao@gmail.com \
--cc=linmiaohe@huawei.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lorenzo.stoakes@oracle.com \
--cc=mclapinski@google.com \
--cc=mhocko@suse.com \
--cc=nao.horiguchi@gmail.com \
--cc=osalvador@suse.de \
--cc=rafael.j.wysocki@intel.com \
--cc=rppt@kernel.org \
--cc=russ.anderson@hpe.com \
--cc=shawn.fan@intel.com \
--cc=shuah@kernel.org \
--cc=surenb@google.com \
--cc=vbabka@suse.cz \
/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.