From: Ankur Arora <ankur.a.arora@oracle.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ankur Arora <ankur.a.arora@oracle.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org,
akpm@linux-foundation.org, david@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, hpa@zytor.com, mingo@redhat.com,
mjguzik@gmail.com, luto@kernel.org, peterz@infradead.org,
namhyung@kernel.org, tglx@linutronix.de, willy@infradead.org,
raghavendra.kt@amd.com, boris.ostrovsky@oracle.com,
konrad.wilk@oracle.com
Subject: Re: [PATCH v6 00/15] mm: folio_zero_user: clear contiguous pages
Date: Fri, 12 Sep 2025 14:12:17 -0700 [thread overview]
Message-ID: <87tt17ide6.fsf@oracle.com> (raw)
In-Reply-To: <aMRnarU3w_XykRHG@x1>
Arnaldo Carvalho de Melo <acme@kernel.org> writes:
> On Tue, Sep 02, 2025 at 01:08:01AM -0700, Ankur Arora wrote:
>> This series adds clearing of contiguous page ranges for hugepages,
>> improving on the current page-at-a-time approach in two ways:
>>
>> - amortizes the per-page setup cost over a larger extent
>>
>> - when using string instructions, exposes the real region size
>> to the processor.
>>
>> A processor could use a knowledge of the extent to optimize the
>> clearing. AMD Zen uarchs, as an example, elide allocation of
>> cachelines for regions larger than L3-size.
>>
>> Demand faulting a 64GB region shows performance improvements:
>>
>> $ perf bench mem map -p $pg-sz -f demand -s 64GB -l 5
>
> So, can I go ahead and pull the tools/perf/ bits into perf-tools-next,
> Namhyung already reviewed it, the rest can go thru the relevant
> channels, ok?
Sounds great. I think I have Namhyung's R-by on all but patches 6 and 9.
Thanks!
--
ankur
prev parent reply other threads:[~2025-09-12 21:12 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-02 8:08 Ankur Arora
2025-09-02 8:08 ` [PATCH v6 01/15] perf bench mem: Remove repetition around time measurement Ankur Arora
2025-09-02 8:08 ` [PATCH v6 02/15] perf bench mem: Defer type munging of size to float Ankur Arora
2025-09-02 8:08 ` [PATCH v6 03/15] perf bench mem: Move mem op parameters into a structure Ankur Arora
2025-09-02 8:08 ` [PATCH v6 04/15] perf bench mem: Pull out init/fini logic Ankur Arora
2025-09-02 8:08 ` [PATCH v6 05/15] perf bench mem: Switch from zalloc() to mmap() Ankur Arora
2025-09-02 8:08 ` [PATCH v6 06/15] perf bench mem: Allow mapping of hugepages Ankur Arora
2025-09-02 8:08 ` [PATCH v6 07/15] perf bench mem: Allow chunking on a memory region Ankur Arora
2025-09-02 8:08 ` [PATCH v6 08/15] perf bench mem: Refactor mem_options Ankur Arora
2025-09-02 8:08 ` [PATCH v6 09/15] perf bench mem: Add mmap() workloads Ankur Arora
2025-09-02 8:08 ` [PATCH v6 10/15] x86/mm: Simplify clear_page_* Ankur Arora
2025-09-02 8:08 ` [PATCH v6 11/15] mm: define clear_pages(), clear_user_pages() Ankur Arora
2025-09-02 19:56 ` kernel test robot
2025-09-02 20:09 ` kernel test robot
2025-09-02 20:16 ` David Hildenbrand
2025-09-03 4:08 ` Ankur Arora
2025-09-12 21:17 ` Ankur Arora
2025-09-02 8:08 ` [PATCH v6 12/15] highmem: define clear_highpages() Ankur Arora
2025-09-02 20:20 ` David Hildenbrand
2025-09-03 4:09 ` Ankur Arora
2025-09-02 8:08 ` [PATCH v6 13/15] mm: memory: support clearing page ranges Ankur Arora
2025-09-02 19:46 ` kernel test robot
2025-09-02 8:08 ` [PATCH v6 14/15] x86/clear_page: Introduce clear_pages() Ankur Arora
2025-09-02 8:08 ` [PATCH v6 15/15] x86/clear_pages: Support clearing of page-extents Ankur Arora
2025-09-12 18:33 ` [PATCH v6 00/15] mm: folio_zero_user: clear contiguous pages Arnaldo Carvalho de Melo
2025-09-12 21:12 ` Ankur Arora [this message]
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