From: Usama Arif <usamaarif642@gmail.com>
To: Yafang Shao <laoar.shao@gmail.com>,
akpm@linux-foundation.org, david@redhat.com, ziy@nvidia.com,
baolin.wang@linux.alibaba.com, lorenzo.stoakes@oracle.com,
Liam.Howlett@oracle.com, npache@redhat.com, ryan.roberts@arm.com,
dev.jain@arm.com, hannes@cmpxchg.org,
gutierrez.asier@huawei-partners.com, willy@infradead.org,
ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org
Cc: bpf@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC PATCH v3 0/5] mm, bpf: BPF based THP adjustment
Date: Thu, 17 Jul 2025 17:35:51 +0100 [thread overview]
Message-ID: <e14b70a8-e49b-47e2-ad0c-f60c81363d3d@gmail.com> (raw)
In-Reply-To: <20250608073516.22415-1-laoar.shao@gmail.com>
On 08/06/2025 08:35, Yafang Shao wrote:
> Background
> ----------
>
> We have consistently configured THP to "never" on our production servers
> due to past incidents caused by its behavior:
>
> - Increased memory consumption
> THP significantly raises overall memory usage.
>
> - Latency spikes
> Random latency spikes occur due to more frequent memory compaction
> activity triggered by THP.
>
> - Lack of Fine-Grained Control
> THP tuning knobs are globally configured, making them unsuitable for
> containerized environments. When different workloads run on the same
> host, enabling THP globally (without per-workload control) can cause
> unpredictable behavior.
>
> Due to these issues, system administrators remain hesitant to switch to
> "madvise" or "always" modes—unless finer-grained control over THP
> behavior is implemented.
>
Would this solution work and be carried over in fork+exec? As that is something
which is very common. How would that look like?
next prev parent reply other threads:[~2025-07-17 16:35 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-08 7:35 [RFC PATCH v3 0/5] mm, bpf: BPF based THP adjustment Yafang Shao
2025-06-08 7:35 ` [RFC PATCH v3 1/5] mm, thp: use __thp_vma_allowable_orders() in khugepaged_enter_vma() Yafang Shao
2025-07-17 14:48 ` Usama Arif
2025-07-20 2:37 ` Yafang Shao
2025-06-08 7:35 ` [RFC PATCH v3 2/5] mm, thp: add bpf thp hook to determine thp allocator Yafang Shao
2025-07-17 15:30 ` Usama Arif
2025-07-20 3:00 ` Yafang Shao
2025-06-08 7:35 ` [RFC PATCH v3 3/5] mm, thp: add bpf thp hook to determine thp reclaimer Yafang Shao
2025-07-17 16:06 ` Usama Arif
2025-07-20 3:03 ` Yafang Shao
2025-06-08 7:35 ` [RFC PATCH v3 4/5] mm: thp: add bpf thp struct ops Yafang Shao
2025-07-17 16:25 ` Usama Arif
2025-07-17 18:21 ` Amery Hung
2025-07-20 3:07 ` Yafang Shao
2025-06-08 7:35 ` [RFC PATCH v3 5/5] selftests/bpf: Add selftest for THP adjustment Yafang Shao
2025-07-15 22:42 ` [RFC PATCH v3 0/5] mm, bpf: BPF based " David Hildenbrand
2025-07-17 3:09 ` Yafang Shao
2025-07-17 8:52 ` David Hildenbrand
2025-07-17 9:05 ` Lorenzo Stoakes
2025-07-20 2:32 ` Yafang Shao
2025-07-20 15:56 ` David Hildenbrand
2025-07-22 2:40 ` Yafang Shao
2025-07-22 7:28 ` David Hildenbrand
2025-07-22 10:09 ` Lorenzo Stoakes
2025-07-22 11:56 ` Yafang Shao
2025-07-22 12:04 ` Lorenzo Stoakes
2025-07-22 12:16 ` Yafang Shao
2025-07-22 11:46 ` Yafang Shao
2025-07-22 11:54 ` Lorenzo Stoakes
2025-07-22 12:02 ` Yafang Shao
2025-07-22 12:08 ` Lorenzo Stoakes
2025-07-17 16:35 ` Usama Arif [this message]
2025-07-20 2:54 ` Yafang Shao
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