From: David Hildenbrand <david@redhat.com>
To: Matthew Wilcox <willy@infradead.org>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Usama Arif <usamaarif642@gmail.com>,
Yafang Shao <laoar.shao@gmail.com>,
Nico Pache <npache@redhat.com>,
akpm@linux-foundation.org, ziy@nvidia.com,
baolin.wang@linux.alibaba.com, Liam.Howlett@oracle.com,
ryan.roberts@arm.com, dev.jain@arm.com, hannes@cmpxchg.org,
gutierrez.asier@huawei-partners.com, ast@kernel.org,
daniel@iogearbox.net, andrii@kernel.org, bpf@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [RFC PATCH v2 0/5] mm, bpf: BPF based THP adjustment
Date: Tue, 20 May 2025 16:56:43 +0200 [thread overview]
Message-ID: <ead86239-0e0f-4c69-801f-af5667f163de@redhat.com> (raw)
In-Reply-To: <aCyU7Q2DhPPF3Oau@casper.infradead.org>
On 20.05.25 16:42, Matthew Wilcox wrote:
> On Tue, May 20, 2025 at 03:35:49PM +0100, Lorenzo Stoakes wrote:
>> I agree global settings are not fine-grained enough, but 'sys admins refuse
>> to do X so we want to ignore what they do' is... really not right at all.
>
> Oh, we do that all the time, Leave the interface around but document
> it's now a no-op. For example, file-backed memory ignores the THP
> settings completely.
IIRC, it never honored it. Like shmem it also never honored it an
instead used it's own toggle (not sure what to think about that ...).
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2025-05-20 14:56 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-20 6:04 [RFC PATCH v2 0/5] mm, bpf: BPF based THP adjustment Yafang Shao
2025-05-20 6:04 ` [RFC PATCH v2 1/5] mm: thp: Add a new mode "bpf" Yafang Shao
2025-05-20 6:05 ` [RFC PATCH v2 2/5] mm: thp: Add hook for BPF based THP adjustment Yafang Shao
2025-05-20 6:05 ` [RFC PATCH v2 3/5] mm: thp: add struct ops " Yafang Shao
2025-05-20 6:05 ` [RFC PATCH v2 4/5] bpf: Add get_current_comm to bpf_base_func_proto Yafang Shao
2025-05-20 23:32 ` Andrii Nakryiko
2025-05-20 6:05 ` [RFC PATCH v2 5/5] selftests/bpf: Add selftest for THP adjustment Yafang Shao
2025-05-20 6:52 ` [RFC PATCH v2 0/5] mm, bpf: BPF based " Nico Pache
2025-05-20 7:25 ` Yafang Shao
2025-05-20 13:10 ` Matthew Wilcox
2025-05-20 14:08 ` Yafang Shao
2025-05-20 14:22 ` Lorenzo Stoakes
2025-05-20 14:32 ` Usama Arif
2025-05-20 14:35 ` Lorenzo Stoakes
2025-05-20 14:42 ` Matthew Wilcox
2025-05-20 14:56 ` David Hildenbrand [this message]
2025-05-21 4:28 ` Yafang Shao
2025-05-20 14:46 ` Usama Arif
2025-05-20 15:00 ` David Hildenbrand
2025-05-20 9:43 ` David Hildenbrand
2025-05-20 9:49 ` Lorenzo Stoakes
2025-05-20 12:06 ` Yafang Shao
2025-05-20 13:45 ` Lorenzo Stoakes
2025-05-20 15:54 ` David Hildenbrand
2025-05-21 4:02 ` Yafang Shao
2025-05-21 3:52 ` Yafang Shao
2025-05-20 11:59 ` Yafang Shao
2025-05-25 3:01 ` Yafang Shao
2025-05-26 7:41 ` Gutierrez Asier
2025-05-26 9:37 ` Yafang Shao
2025-05-26 8:14 ` David Hildenbrand
2025-05-26 9:37 ` Yafang Shao
2025-05-26 10:49 ` David Hildenbrand
2025-05-26 14:53 ` Liam R. Howlett
2025-05-26 15:54 ` Liam R. Howlett
2025-05-26 16:51 ` David Hildenbrand
2025-05-26 17:07 ` Liam R. Howlett
2025-05-26 17:12 ` David Hildenbrand
2025-05-26 20:30 ` Gutierrez Asier
2025-05-26 20:37 ` David Hildenbrand
2025-05-27 5:46 ` Yafang Shao
2025-05-27 7:57 ` David Hildenbrand
2025-05-27 8:13 ` Yafang Shao
2025-05-27 8:30 ` David Hildenbrand
2025-05-27 8:40 ` Yafang Shao
2025-05-27 9:27 ` David Hildenbrand
2025-05-27 9:43 ` Yafang Shao
2025-05-27 12:19 ` David Hildenbrand
2025-05-28 2:04 ` Yafang Shao
2025-05-28 20:32 ` David Hildenbrand
2025-05-26 14:32 ` Zi Yan
2025-05-27 5:53 ` Yafang Shao
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