From patchwork Sat Feb 17 20:24:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuck Lever X-Patchwork-Id: 13561587 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 5DC567FBAC; Sat, 17 Feb 2024 20:24:11 +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=1708201451; cv=none; b=m9OenjuRKdhYD1E0hCKuD9WzFBYc6CfKQ3mGftdizUFIAJo7VJoS3CIhp3haM9CZhk7ldLE4F9RBk3n72+phF7uilnh6dvngnLbHgkmwN60bJR33LMJUM2YkeyRB0QCD8R+5VyRAeaFWtI/eRUUanUbaNchNobzheoqPfnsI8Do= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708201451; c=relaxed/simple; bh=r6dLn2R32hxUVKrwHaR6P90sYMJO3HfuXaP1srQuHsY=; h=Subject:From:To:Cc:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=lGeq762d7q8FXyZEDTlesMwDnrPM9wgHfW9GsjYa69R/XDIHhI3VQn7JDk5eF+GEsmRjqDsQb5Jtz+jc2aLGfWWOvKRyCm/2RIya7HpmW2ZFq5Z5lJ3D4QvJxpNVFBng0ooKBQkkV8LLSek/OgHIfHy0VnVv/VSS8QrE4sjdW8s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=O/VgTJ4c; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="O/VgTJ4c" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7B52C433C7; Sat, 17 Feb 2024 20:24:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708201451; bh=r6dLn2R32hxUVKrwHaR6P90sYMJO3HfuXaP1srQuHsY=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=O/VgTJ4chu/g5D0kuQ6IwQrqk6Yged1gYNOnPpILQjot3IwuwxhS0tjBHhH+sQ2Kz Zxyb7DTRLGPN4oi1a1lmsh4iMS7n4x8eU7JR4n/7kJCgHm31IjaEMLd1aj3WKlJZTI cWR5pWetfkjmwe/CpCU4IWr+5zr/kolzJq/4IHeq53kuEhX7f+Lj34sgVaaCR9TUTA WqRRhpu5EBPzA0IeI1/a8ljmj1zl5QVpNFm6gr31iF/Lh2h1sWihqI5TErBNv7U0Gl nkriuby+Se6wuvehqDAuLb9N0LS2Jbw55eloingd6OQJgzmXnWAbWh+8Yghq/aV+hZ 9cHhYH/qLF81Q== Subject: [PATCH v2 5/6] test_maple_tree: testing the cyclic allocation From: Chuck Lever To: viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, hughd@google.com, akpm@linux-foundation.org, Liam.Howlett@oracle.com, oliver.sang@intel.com, feng.tang@intel.com Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, maple-tree@lists.infradead.org, linux-mm@kvack.org, lkp@intel.com Date: Sat, 17 Feb 2024 15:24:08 -0500 Message-ID: <170820144894.6328.13052830860966450674.stgit@91.116.238.104.host.secureserver.net> In-Reply-To: <170820083431.6328.16233178852085891453.stgit@91.116.238.104.host.secureserver.net> References: <170820083431.6328.16233178852085891453.stgit@91.116.238.104.host.secureserver.net> User-Agent: StGit/1.5 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Liam R. Howlett This tests the interactions of the cyclic allocations, the maple state index and last, and overflow. Signed-off-by: Liam R. Howlett Signed-off-by: Chuck Lever --- lib/test_maple_tree.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/lib/test_maple_tree.c b/lib/test_maple_tree.c index 29185ac5c727..399380db449c 100644 --- a/lib/test_maple_tree.c +++ b/lib/test_maple_tree.c @@ -3599,6 +3599,45 @@ static noinline void __init check_state_handling(struct maple_tree *mt) mas_unlock(&mas); } +static noinline void __init alloc_cyclic_testing(struct maple_tree *mt) +{ + unsigned long location; + unsigned long next; + int ret = 0; + MA_STATE(mas, mt, 0, 0); + + next = 0; + mtree_lock(mt); + for (int i = 0; i < 100; i++) { + mas_alloc_cyclic(&mas, &location, mt, 2, ULONG_MAX, &next, GFP_KERNEL); + MAS_BUG_ON(&mas, i != location - 2); + MAS_BUG_ON(&mas, mas.index != location); + MAS_BUG_ON(&mas, mas.last != location); + MAS_BUG_ON(&mas, i != next - 3); + } + + mtree_unlock(mt); + mtree_destroy(mt); + next = 0; + mt_init_flags(mt, MT_FLAGS_ALLOC_RANGE); + for (int i = 0; i < 100; i++) { + mtree_alloc_cyclic(mt, &location, mt, 2, ULONG_MAX, &next, GFP_KERNEL); + MT_BUG_ON(mt, i != location - 2); + MT_BUG_ON(mt, i != next - 3); + MT_BUG_ON(mt, mtree_load(mt, location) != mt); + } + + mtree_destroy(mt); + /* Overflow test */ + next = ULONG_MAX - 1; + ret = mtree_alloc_cyclic(mt, &location, mt, 2, ULONG_MAX, &next, GFP_KERNEL); + MT_BUG_ON(mt, ret != 0); + ret = mtree_alloc_cyclic(mt, &location, mt, 2, ULONG_MAX, &next, GFP_KERNEL); + MT_BUG_ON(mt, ret != 0); + ret = mtree_alloc_cyclic(mt, &location, mt, 2, ULONG_MAX, &next, GFP_KERNEL); + MT_BUG_ON(mt, ret != 1); +} + static DEFINE_MTREE(tree); static int __init maple_tree_seed(void) { @@ -3880,6 +3919,11 @@ static int __init maple_tree_seed(void) check_state_handling(&tree); mtree_destroy(&tree); + mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE); + alloc_cyclic_testing(&tree); + mtree_destroy(&tree); + + #if defined(BENCH) skip: #endif