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Tue, 20 May 2025 07:08:39 -0700 (PDT) MIME-Version: 1.0 References: <20250520060504.20251-1-laoar.shao@gmail.com> In-Reply-To: From: Yafang Shao Date: Tue, 20 May 2025 22:08:03 +0800 X-Gm-Features: AX0GCFuzeGC_Vo5CiRuC8Z__YjWOafRsZm9lwTrMJeZeDyr3nvckYp1Izr0sSEI Message-ID: Subject: Re: [RFC PATCH v2 0/5] mm, bpf: BPF based THP adjustment To: Matthew Wilcox Cc: Nico Pache , akpm@linux-foundation.org, david@redhat.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, ryan.roberts@arm.com, dev.jain@arm.com, hannes@cmpxchg.org, usamaarif642@gmail.com, gutierrez.asier@huawei-partners.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, bpf@vger.kernel.org, linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: ezzzbx6bdc966gxbya73suiinybw3zfe X-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 603F820010 X-HE-Tag: 1747750120-454651 X-HE-Meta: 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 N4hvhh35 CW8GX7Guj7dAcaXc= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, May 20, 2025 at 9:10=E2=80=AFPM Matthew Wilcox wrote: > > On Tue, May 20, 2025 at 03:25:07PM +0800, Yafang Shao wrote: > > The challenge we face is that our system administration team doesn't > > permit enabling THP globally in production by setting it to "madvise" > > or "always". As a result, we can only experiment with your feature on > > our test servers at this stage. > > That's a you problem. perhaps. > You need to figure out how to influence your > sysadmin team to change their mind; whether it's by talking to their > superiors or persuading them directly. I believe that "practicing" matters more than "talking" or "persuading". I=E2=80=99m surprised your suggestion relies on "talking" ;-) If I understand correctly, we all agree that "talk is cheap", right? > It's not a justification for why > upstream should take this patch. I believe Johannes has clearly explained the challenges the community is currently facing [0]. [0]. https://lore.kernel.org/linux-mm/20250430174521.GC2020@cmpxchg.org/ -- Regards Yafang