From: Andrew Morton <akpm@linux-foundation.org>
To: Kiryl Shutsemau <kirill@shutemov.name>
Cc: david@kernel.org, ljs@kernel.org, rppt@kernel.org,
linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
linux-kernel@vger.kernel.org, usama.anjum@arm.com,
usama.arif@linux.dev, baolin.wang@linux.alibaba.com,
nico.pache@linux.dev, ziy@nvidia.com, baohua@kernel.org,
dev.jain@arm.com, hughd@google.com, lance.yang@linux.dev,
liam@infradead.org, mhocko@suse.com, ryan.roberts@arm.com,
shuah@kernel.org, surenb@google.com, vbabka@kernel.org,
agordeev@linux.ibm.com, jgg@ziepe.ca, leon@kernel.org,
kernel-team@meta.com, "Kiryl Shutsemau (Meta)" <kas@kernel.org>
Subject: Re: [PATCH v5 00/19] selftests/mm: improve khugepaged coverage
Date: Tue, 8 Sep 2026 12:41:02 -0700 [thread overview]
Message-ID: <20260908124102.4c874a8a63e50a1cc90e4bfc@linux-foundation.org> (raw)
In-Reply-To: <20260908125105.1510704-1-kirill@shutemov.name>
On Tue, 8 Sep 2026 13:50:46 +0100 Kiryl Shutsemau <kirill@shutemov.name> wrote:
> khugepaged collapses to mTHP orders since 7.2, and 7.3 added three
> selftest cases for it: the generic collapse cases run at one order named
> by -c, with the result detected by counting folios of that order.
>
> That leaves the collapse path largely untested. The suite does not run
> where a PMD is 512M. A folio count cannot say where a collapse landed.
> Fixed sleeps cannot tell "not collapsed" from "not scanned yet". And
> nothing exercises collapse under contention.
>
> Close those gaps in order:
Added to mm-new, thanks.
Sashiko asked a few things:
https://sashiko.dev/#/patchset/20260908125105.1510704-1-kirill@shutemov.name
next prev parent reply other threads:[~2026-09-08 19:41 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-08 12:50 [PATCH v5 00/19] selftests/mm: improve khugepaged coverage Kiryl Shutsemau
2026-09-08 12:50 ` [PATCH v5 01/19] selftests/mm: raise the khugepaged test-case cap Kiryl Shutsemau
2026-09-09 7:42 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 02/19] selftests/mm: skip collapse_compound_extreme() where the PMD is too large Kiryl Shutsemau
2026-09-09 7:51 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 03/19] selftests/mm: scale khugepaged's collapse wait with the PMD size Kiryl Shutsemau
2026-09-09 7:59 ` Baolin Wang
2026-09-09 10:09 ` Kiryl Shutsemau
2026-09-09 10:17 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 04/19] selftests/mm: skip khugepaged page cache cases without a PMD folio Kiryl Shutsemau
2026-09-09 8:21 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 05/19] selftests/mm: make the swap cases' swapout reliable Kiryl Shutsemau
2026-09-09 8:59 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 06/19] selftests/mm: stop khugepaged during the MADV_COLLAPSE cases Kiryl Shutsemau
2026-09-09 9:55 ` Baolin Wang
2026-09-09 10:41 ` Kiryl Shutsemau
2026-09-10 6:27 ` Baolin Wang
2026-09-10 10:59 ` Kiryl Shutsemau
2026-09-10 11:06 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 07/19] selftests/mm: move is_backed_by_folio() into vm_util Kiryl Shutsemau
2026-09-09 9:16 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 08/19] selftests/mm: add folio-order check for address ranges Kiryl Shutsemau
2026-09-09 10:01 ` Baolin Wang
2026-09-10 10:45 ` Kiryl Shutsemau
2026-09-10 11:14 ` Baolin Wang
2026-09-10 13:04 ` Kiryl Shutsemau
2026-09-11 2:50 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 09/19] selftests/mm: add folio-order detection self-check Kiryl Shutsemau
2026-09-08 12:50 ` [PATCH v5 10/19] selftests/mm: add khugepaged completion barrier helper Kiryl Shutsemau
2026-09-10 1:17 ` Baolin Wang
2026-09-08 12:50 ` [PATCH v5 11/19] selftests/mm: add order-parameterized khugepaged collapse cases Kiryl Shutsemau
2026-09-10 4:59 ` Baolin Wang
2026-09-10 10:53 ` Kiryl Shutsemau
2026-09-08 12:50 ` [PATCH v5 12/19] selftests/mm: parameterize the mixed-source collapse case by source order Kiryl Shutsemau
2026-09-10 5:09 ` Baolin Wang
2026-09-10 10:58 ` Kiryl Shutsemau
2026-09-08 12:50 ` [PATCH v5 13/19] selftests/mm: cover a shared-source collapse write race Kiryl Shutsemau
2026-09-08 21:02 ` Kiryl Shutsemau
2026-09-08 12:51 ` [PATCH v5 14/19] selftests/mm: run every supported collapse order by default Kiryl Shutsemau
2026-09-10 6:07 ` Baolin Wang
2026-09-08 12:51 ` [PATCH v5 15/19] selftests/mm: check that one khugepaged pass collapses one window Kiryl Shutsemau
2026-09-08 12:51 ` [PATCH v5 16/19] selftests/mm: add khugepaged race harness Kiryl Shutsemau
2026-09-08 21:34 ` Kiryl Shutsemau
2026-09-08 12:51 ` [PATCH v5 17/19] selftests/mm: race the collapse of windows with holes Kiryl Shutsemau
2026-09-08 12:51 ` [PATCH v5 18/19] selftests/mm: add memory-pressure threads to the khugepaged race harness Kiryl Shutsemau
2026-09-08 12:51 ` [PATCH v5 19/19] selftests/mm: zap whole PTE tables in " Kiryl Shutsemau
2026-09-08 19:41 ` Andrew Morton [this message]
2026-09-08 21:36 ` [PATCH v5 00/19] selftests/mm: improve khugepaged coverage Kiryl Shutsemau
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