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lib: kunit_iov_iter: repeatedly call alloc_pages_bulk()

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alloc_pages_bulk() is not guaranteed to return all requested pages in a
single call.

Call it repeatedly until all pages have been allocated or no more progress
is being made.

Link: https://lore.kernel.org/20260526-kunit_iov_iter-alloc_bulk-v2-1-24fbcd995c61@weissschuh.net
Fixes: 2d71340ff1 ("iov_iter: Kunit tests for copying to/from an iterator")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Cc: "Christian A. Ehrhardt" <lk@c--e.de>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Thomas Weißschuh 2026-05-26 18:43:40 +02:00 committed by Andrew Morton
parent 94bfc7f3b0
commit 9ac9a08e4a
1 changed files with 10 additions and 2 deletions
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12
lib/tests/kunit_iov_iter.c
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@ -53,7 +53,7 @@ static void *__init iov_kunit_create_buffer(struct kunit *test,
size_t npages)
{
struct page **pages;
unsigned long got;
unsigned long got, last;
void *buffer;
unsigned int i;
@ -61,7 +61,15 @@ static void *__init iov_kunit_create_buffer(struct kunit *test,
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pages);
*ppages = pages;
got = alloc_pages_bulk(GFP_KERNEL, npages, pages);
got = 0;
while (true) {
last = got;
got = alloc_pages_bulk(GFP_KERNEL, npages, pages);
if (last == got || got == npages)
break;
}
if (got != npages) {
release_pages(pages, got);
kvfree(pages);