From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A1A4717D2 for ; Wed, 18 Jun 2025 23:53:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750290781; cv=none; b=La8k0b7LocNFocP94mR+3P7faEmOml7mSN19gZc598qCi4EQHu6jTdMVMTOg/6jZbblEjV+7ClFmgAdPqh6zjmCqvHlIP8O5z5bIVCF5Y1bo0KGfazRPOLBh6GWhQpGLzICqfW8OgcxoBku+uVard9Jj2QUgeEh0/azwgd8/Fzc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750290781; c=relaxed/simple; bh=knySjgXb8hWmkAI/EWuJGyo4W/JXwegjuY3hjZTREnc=; h=Date:To:From:Subject:Message-Id; b=DZJxBGt93B0VNJTO+3EEp6SwLrAdYSC2vKV/fglLMpxexUbQjW/EL0dt9x/xC6rdPSHPKCTkNJ7ZlVCfSUjaLDViSlvXu+R/X421qanSVakhhXyI86KyJAXZn7O97UWhjiH30FnuBGQBgUrS6kcQyQuSTmli6r0JoJGOyBEqtAY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=n4iTJ7Uc; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="n4iTJ7Uc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57737C4CEE7; Wed, 18 Jun 2025 23:53:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1750290781; bh=knySjgXb8hWmkAI/EWuJGyo4W/JXwegjuY3hjZTREnc=; h=Date:To:From:Subject:From; b=n4iTJ7UcsqEhQmO6+wCayFGO4Nn+jVbBe2vEMqlllMW3aeCDrTEkA0TaLvebSztgH ar3EZF9cRvZiQGC9JnILQsrYsX4jXvOXzhN+xIPyM+JHCaFDmzGa7OAYwJ4VMeQzd+ rH9XMvWB2MvMZLausdwIf0NTKgOT1GaOtMkvjNrM= Date: Wed, 18 Jun 2025 16:53:00 -0700 To: mm-commits@vger.kernel.org,steven.sistare@oracle.com,osalvador@suse.de,muchun.song@linux.dev,kraxel@redhat.com,david@redhat.com,vivek.kasireddy@intel.com,akpm@linux-foundation.org From: Andrew Morton Subject: + selftests-udmabuf-add-a-test-to-pin-first-before-writing-to-memfd.patch added to mm-new branch Message-Id: <20250618235301.57737C4CEE7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: selftests/udmabuf: add a test to pin first before writing to memfd has been added to the -mm mm-new branch. Its filename is selftests-udmabuf-add-a-test-to-pin-first-before-writing-to-memfd.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-udmabuf-add-a-test-to-pin-first-before-writing-to-memfd.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Vivek Kasireddy Subject: selftests/udmabuf: add a test to pin first before writing to memfd Date: Tue, 17 Jun 2025 22:30:55 -0700 Unlike the existing tests, this new test will create a memfd (backed by hugetlb) and pin the folios in it (a small subset) before writing/ populating it with data. This is a valid use-case that invokes the memfd_alloc_folio() kernel API and is expected to work unless there aren't enough hugetlb folios to satisfy the allocation needs. Link: https://lkml.kernel.org/r/20250618053415.1036185-4-vivek.kasireddy@intel.com Signed-off-by: Vivek Kasireddy Cc: Gerd Hoffmann Cc: Steve Sistare Cc: Muchun Song Cc: David Hildenbrand Cc: Oscar Salvador Signed-off-by: Andrew Morton --- tools/testing/selftests/drivers/dma-buf/udmabuf.c | 20 +++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) --- a/tools/testing/selftests/drivers/dma-buf/udmabuf.c~selftests-udmabuf-add-a-test-to-pin-first-before-writing-to-memfd +++ a/tools/testing/selftests/drivers/dma-buf/udmabuf.c @@ -138,7 +138,7 @@ int main(int argc, char *argv[]) void *addr1, *addr2; ksft_print_header(); - ksft_set_plan(6); + ksft_set_plan(7); devfd = open("/dev/udmabuf", O_RDWR); if (devfd < 0) { @@ -250,6 +250,24 @@ int main(int argc, char *argv[]) close(buf); close(memfd); + + /* same test as above but we pin first before writing to memfd */ + page_size = getpagesize() * 512; /* 2 MB */ + size = MEMFD_SIZE * page_size; + memfd = create_memfd_with_seals(size, true); + buf = create_udmabuf_list(devfd, memfd, size); + addr2 = mmap_fd(buf, NUM_PAGES * NUM_ENTRIES * getpagesize()); + addr1 = mmap_fd(memfd, size); + write_to_memfd(addr1, size, 'a'); + write_to_memfd(addr1, size, 'b'); + ret = compare_chunks(addr1, addr2, size); + if (ret < 0) + ksft_test_result_fail("%s: [FAIL,test-7]\n", TEST_PREFIX); + else + ksft_test_result_pass("%s: [PASS,test-7]\n", TEST_PREFIX); + + close(buf); + close(memfd); close(devfd); ksft_print_msg("%s: ok\n", TEST_PREFIX); _ Patches currently in -mm which might be from vivek.kasireddy@intel.com are mm-hugetlb-make-hugetlb_reserve_pages-return-nr-of-entries-updated.patch mm-memfd-reserve-hugetlb-folios-before-allocation.patch selftests-udmabuf-add-a-test-to-pin-first-before-writing-to-memfd.patch