linux-kernel - [PATCH] lib/test_meminit: Allocate pages up to order MAX

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Message-ID: <20230714015238.47931-1-ajd@linux.ibm.com>
Date:   Fri, 14 Jul 2023 11:52:38 +1000
From:   Andrew Donnellan <ajd@...ux.ibm.com>
To:     akpm@...ux-foundation.org, glider@...gle.com,
        xkernel.wang@...mail.com, linux-kernel@...r.kernel.org
Subject: [PATCH] lib/test_meminit: Allocate pages up to order MAX_ORDER

test_pages() tests the page allocator by calling alloc_pages() with
different orders up to order 10.

However, different architectures and platforms support different maximum
contiguous allocation sizes. The default maximum allocation order
(MAX_ORDER) is 10, but architectures can use CONFIG_ARCH_FORCE_MAX_ORDER
to override this. On platforms where this is less than 10, test_meminit()
will blow up with a WARN(). This is expected, so let's not do that.

Replace the hardcoded "10" with the MAX_ORDER macro so that we test
allocations up to the expected platform limit.

Fixes: 5015a300a522 ("lib: introduce test_meminit module")
Signed-off-by: Andrew Donnellan <ajd@...ux.ibm.com>
---
 lib/test_meminit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/test_meminit.c b/lib/test_meminit.c
index 60e1984c060f..0ae35223d773 100644
--- a/lib/test_meminit.c
+++ b/lib/test_meminit.c
@@ -93,7 +93,7 @@ static int __init test_pages(int *total_failures)
 	int failures = 0, num_tests = 0;
 	int i;

-	for (i = 0; i < 10; i++)
+	for (i = 0; i <= MAX_ORDER; i++)
 		num_tests += do_alloc_pages_order(i, &failures);

 	REPORT_FAILURES_IN_FN();
-- 
2.41.0