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From: Kiryl Shutsemau <kirill@shutemov.name>
To: Andrew Morton <akpm@linux-foundation.org>,
	"David Hildenbrand (Arm)" <david@kernel.org>,
	"Lorenzo Stoakes (ARM)" <ljs@kernel.org>,
	Mike Rapoport <rppt@kernel.org>,
	Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Kiryl Shutsemau (Meta)" <kas@kernel.org>,
	linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Muhammad Usama Anjum <usama.anjum@arm.com>,
	Usama Arif <usama.arif@linux.dev>,
	"Nico Pache (Red Hat)" <nico.pache@linux.dev>,
	Zi Yan <ziy@nvidia.com>, Barry Song <baohua@kernel.org>,
	Dev Jain <dev.jain@arm.com>, Hugh Dickins <hughd@google.com>,
	Lance Yang <lance.yang@linux.dev>,
	"Liam R. Howlett" <liam@infradead.org>,
	Michal Hocko <mhocko@suse.com>,
	Ryan Roberts <ryan.roberts@arm.com>,
	Shuah Khan <shuah@kernel.org>,
	Suren Baghdasaryan <surenb@google.com>,
	"Vlastimil Babka (SUSE)" <vbabka@kernel.org>,
	Alexander Gordeev <agordeev@linux.ibm.com>,
	Jason Gunthorpe <jgg@ziepe.ca>, Leon Romanovsky <leon@kernel.org>,
	kernel-team@meta.com
Subject: [PATCH v6 01/19] selftests/mm: raise the khugepaged test-case cap
Date: Sat, 19 Sep 2026 01:24:31 +0100	[thread overview]
Message-ID: <20260919002451.496763-2-kirill@shutemov.name> (raw)
In-Reply-To: <20260919002451.496763-1-kirill@shutemov.name>

From: "Kiryl Shutsemau (Meta)" <kas@kernel.org>

TEST() ends the run with "MAX_TEST_CASES is too small" when the table
fills, and the table holds 64.  A full invocation already registers 63, so
the next case added anywhere aborts the whole suite before a single test
runs.

Raise the cap to 256.  The table is a static array of small structs, so the
room costs nothing worth counting.

Assisted-by: LLM
Acked-by: Usama Arif <usama.arif@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
---
 tools/testing/selftests/mm/khugepaged.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c
index 525108cace54..c44bc18f7536 100644
--- a/tools/testing/selftests/mm/khugepaged.c
+++ b/tools/testing/selftests/mm/khugepaged.c
@@ -1290,7 +1290,7 @@ struct test_case {
 	test_fn fn;
 };
 
-#define MAX_TEST_CASES 64
+#define MAX_TEST_CASES 256
 static struct test_case test_cases[MAX_TEST_CASES];
 static int nr_test_cases;
 
-- 
2.54.0



  reply	other threads:[~2026-09-19  0:25 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-19  0:24 [PATCH v6 00/19] selftests/mm: improve khugepaged coverage Kiryl Shutsemau
2026-09-19  0:24 ` Kiryl Shutsemau [this message]
2026-09-19  0:24 ` [PATCH v6 02/19] selftests/mm: skip collapse_compound_extreme() where the PMD is too large Kiryl Shutsemau
2026-10-08 11:52   ` Zenghui Yu
2026-09-19  0:24 ` [PATCH v6 03/19] selftests/mm: scale khugepaged's collapse wait with the PMD size Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 04/19] selftests/mm: skip khugepaged page cache cases without a PMD folio Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 05/19] selftests/mm: make the swap cases' swapout reliable Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 06/19] selftests/mm: stop khugepaged during the MADV_COLLAPSE cases Kiryl Shutsemau
2026-09-23  6:25   ` Baolin Wang
2026-09-19  0:24 ` [PATCH v6 07/19] selftests/mm: move is_backed_by_folio() into vm_util Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 08/19] selftests/mm: add folio-order check for address ranges Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 09/19] selftests/mm: add folio-order detection self-check Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 10/19] selftests/mm: add khugepaged completion barrier helper Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 11/19] selftests/mm: add order-parameterized khugepaged collapse cases Kiryl Shutsemau
2026-09-23  6:50   ` Baolin Wang
2026-09-19  0:24 ` [PATCH v6 12/19] selftests/mm: parameterize the mixed-source collapse case by source order Kiryl Shutsemau
2026-09-23  6:55   ` Baolin Wang
2026-09-19  0:24 ` [PATCH v6 13/19] selftests/mm: cover a shared-source collapse write race Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 14/19] selftests/mm: run every supported collapse order by default Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 15/19] selftests/mm: check that one khugepaged pass collapses one window Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 16/19] selftests/mm: add khugepaged race harness Kiryl Shutsemau
2026-10-08  7:30   ` Zenghui Yu
2026-10-08  8:18     ` Muhammad Usama Anjum
2026-10-08 14:23       ` Zenghui Yu
2026-09-19  0:24 ` [PATCH v6 17/19] selftests/mm: race the collapse of windows with holes Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 18/19] selftests/mm: add memory-pressure threads to the khugepaged race harness Kiryl Shutsemau
2026-09-19  0:24 ` [PATCH v6 19/19] selftests/mm: zap whole PTE tables in " Kiryl Shutsemau
2026-09-20 23:54 ` [PATCH v6 00/19] selftests/mm: improve khugepaged coverage Andrew Morton

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