From: Thomas Weißschuh Date: Tue, 26 May 2026 16:43:40 +0000 (+0200) Subject: lib: kunit_iov_iter: repeatedly call alloc_pages_bulk() X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9ac9a08e4ac4bc063e56e1aff266c5e8aa5c6c03;p=thirdparty%2Fkernel%2Flinux.git lib: kunit_iov_iter: repeatedly call alloc_pages_bulk() 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: 2d71340ff1d4 ("iov_iter: Kunit tests for copying to/from an iterator") Signed-off-by: Thomas Weißschuh Cc: "Christian A. Ehrhardt" Reviewed-by: Andrew Morton Signed-off-by: Andrew Morton --- diff --git a/lib/tests/kunit_iov_iter.c b/lib/tests/kunit_iov_iter.c index f02f7b7aa796..1e6fce9cb255 100644 --- a/lib/tests/kunit_iov_iter.c +++ b/lib/tests/kunit_iov_iter.c @@ -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);