From patchwork Fri Sep 2 02:39:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Shaoqin" X-Patchwork-Id: 12963575 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87EFFECAAD3 for ; Fri, 2 Sep 2022 02:40:34 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 19485800A7; Thu, 1 Sep 2022 22:40:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 144B48008D; Thu, 1 Sep 2022 22:40:34 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 00C75800A7; Thu, 1 Sep 2022 22:40:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id E60418008D for ; 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X-IronPort-AV: E=McAfee;i="6500,9779,10457"; a="322032217" X-IronPort-AV: E=Sophos;i="5.93,281,1654585200"; d="scan'208";a="322032217" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2022 19:40:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,281,1654585200"; d="scan'208";a="589841450" Received: from q.bj.intel.com ([10.238.154.102]) by orsmga006.jf.intel.com with ESMTP; 01 Sep 2022 19:40:28 -0700 From: shaoqin.huang@intel.com To: rppt@kernel.org Cc: Shaoqin Huang , Karolina Drobnik , Rebecca Mckeever , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] memblock test: Add test to memblock_add() 129th region Date: Fri, 2 Sep 2022 10:39:59 +0800 Message-Id: <20220902024007.58041-2-shaoqin.huang@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220902024007.58041-1-shaoqin.huang@intel.com> References: <20220902024007.58041-1-shaoqin.huang@intel.com> MIME-Version: 1.0 ARC-Seal: i=1; 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dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=guX8VIbj; spf=pass (imf19.hostedemail.com: domain of shaoqin.huang@intel.com designates 192.55.52.88 as permitted sender) smtp.mailfrom=shaoqin.huang@intel.com; dmarc=pass (policy=none) header.from=intel.com X-Stat-Signature: 3qm6djkqam18exaathfkyspbtaq8dwqe X-Rspamd-Queue-Id: 473B21A0041 X-Rspamd-Server: rspam04 X-Rspam-User: X-HE-Tag: 1662086432-354647 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Shaoqin Huang Add 129th region into the memblock, and this will trigger the memblock_double_array() function, this needs valid memory regions. So using dummy_physical_memory_init() to allocate some valid memory region, and add it into the memblock. It make sure the memblock_double_array() will always choose the valid memory region that is allocated by the dummy_physical_memory_init(). So memblock_double_array() must success. Another thing should be done is to restore the memory.regions after memblock_double_array(), due to now the memory.regions is pointing to a memory region allocated by dummy_physical_memory_init(). And it will affect the subsequent tests if we don't restore the memory region. So simply record the origin region, and restore it after the test. Signed-off-by: Shaoqin Huang --- tools/testing/memblock/tests/basic_api.c | 91 ++++++++++++++++++++++++ tools/testing/memblock/tests/common.c | 15 +++- tools/testing/memblock/tests/common.h | 4 ++ 3 files changed, 108 insertions(+), 2 deletions(-) diff --git a/tools/testing/memblock/tests/basic_api.c b/tools/testing/memblock/tests/basic_api.c index a13a57ba0815..b9877344d3a1 100644 --- a/tools/testing/memblock/tests/basic_api.c +++ b/tools/testing/memblock/tests/basic_api.c @@ -423,6 +423,96 @@ static int memblock_add_near_max_check(void) return 0; } +/* + * A test that trying to add the 129th memory block. + * Expect to trigger memblock_double_array() to double the + * memblock.memory.max, find a new valid memory as + * memory.regions. + */ +static int memblock_add_many_check(void) +{ + int i; + void *orig_region; + struct region r = { + .base = SZ_16K, + .size = MEM_SIZE, + }; + /* Record these allocated memory, they will be free at the end. */ + phys_addr_t base[INIT_MEMBLOCK_REGIONS + 1]; + + PREFIX_PUSH(); + + reset_memblock_regions(); + memblock_allow_resize(); + + for (i = 0; i < INIT_MEMBLOCK_REGIONS; i++) { + /* Add some memory region to fulfill the memblock. */ + dummy_physical_memory_init(); + base[i] = dummy_physical_memory_base(); + memblock_add(base[i], MEM_SIZE); + + ASSERT_EQ(memblock.memory.cnt, i + 1); + ASSERT_EQ(memblock.memory.total_size, (i + 1) * MEM_SIZE); + } + + orig_region = memblock.memory.regions; + + /* + * This adds the 129 memory_region, and makes it double array. Now + * MEM_SIZE is 16K, which is enough, the doubled array will occupy 8K + * memory region, so it must success. + */ + dummy_physical_memory_init(); + base[i] = dummy_physical_memory_base(); + memblock_add(base[i], MEM_SIZE); + + ASSERT_EQ(memblock.memory.cnt, INIT_MEMBLOCK_REGIONS + 1); + ASSERT_EQ(memblock.memory.total_size, (INIT_MEMBLOCK_REGIONS + 1) * MEM_SIZE); + ASSERT_EQ(memblock.memory.max, INIT_MEMBLOCK_REGIONS * 2); + + ASSERT_EQ(memblock.reserved.cnt, 1); + /* This is the size used by new memory.regions. Check it. */ + ASSERT_EQ(memblock.reserved.total_size, PAGE_ALIGN(INIT_MEMBLOCK_REGIONS * 2 * + sizeof(struct memblock_region))); + + /* + * After double array, we want to make sure the memblock.memory.regions + * is actually on a valid memory, so we try to add a memory region which + * the base is very small, it should be insert to the first region. And + * the memory.cnt and memory.total_size will both be changed. + * Let's check it. + */ + memblock_add(r.base, r.size); + ASSERT_EQ(memblock.memory.regions[0].base, r.base); + ASSERT_EQ(memblock.memory.regions[0].size, r.size); + + ASSERT_EQ(memblock.memory.cnt, INIT_MEMBLOCK_REGIONS + 2); + ASSERT_EQ(memblock.memory.total_size, (INIT_MEMBLOCK_REGIONS + 2) * MEM_SIZE); + ASSERT_EQ(memblock.memory.max, INIT_MEMBLOCK_REGIONS * 2); + + /* + * Due to we dummy_physical_memory_init() many memory region in this + * test, we need to free it. Instead of expose the memory_block and + * directly modify it's base, we pass an array which record all the + * memory base that we allocated to this function, and let it to do the + * clean job. + */ + dummy_physical_memory_cleanup_many(base, INIT_MEMBLOCK_REGIONS + 1); + + /* + * The current memory.regions is occupying a range of memory that + * allocated from dummy_physical_memory_init(). After free the memory, + * we must not use it. So restore the origin memory region to make sure + * the tests can run as normal and not affected by the double array. + */ + memblock.memory.regions = orig_region; + memblock.memory.cnt = INIT_MEMBLOCK_REGIONS; + + test_pass_pop(); + + return 0; +} + static int memblock_add_checks(void) { prefix_reset(); @@ -438,6 +528,7 @@ static int memblock_add_checks(void) memblock_add_twice_check(); memblock_add_between_check(); memblock_add_near_max_check(); + memblock_add_many_check(); prefix_pop(); diff --git a/tools/testing/memblock/tests/common.c b/tools/testing/memblock/tests/common.c index eec6901081af..1fb347c5c099 100644 --- a/tools/testing/memblock/tests/common.c +++ b/tools/testing/memblock/tests/common.c @@ -5,8 +5,6 @@ #include #include -#define INIT_MEMBLOCK_REGIONS 128 -#define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS #define PREFIXES_MAX 15 #define DELIM ": " @@ -84,6 +82,19 @@ void dummy_physical_memory_cleanup(void) free(memory_block.base); } +void dummy_physical_memory_cleanup_many(phys_addr_t *base, int cnt) +{ + for (int i = 0; i < cnt; i++) { + memory_block.base = (void *)base[i]; + dummy_physical_memory_cleanup(); + } +} + +phys_addr_t dummy_physical_memory_base(void) +{ + return (phys_addr_t)memory_block.base; +} + static void usage(const char *prog) { BUILD_BUG_ON(ARRAY_SIZE(help_opts) != ARRAY_SIZE(long_opts) - 1); diff --git a/tools/testing/memblock/tests/common.h b/tools/testing/memblock/tests/common.h index 78128e109a95..310f0be2b2a2 100644 --- a/tools/testing/memblock/tests/common.h +++ b/tools/testing/memblock/tests/common.h @@ -11,6 +11,8 @@ #include <../selftests/kselftest.h> #define MEM_SIZE SZ_16K +#define INIT_MEMBLOCK_REGIONS 128 +#define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS enum test_flags { /* No special request. */ @@ -104,6 +106,8 @@ void reset_memblock_attributes(void); void setup_memblock(void); void dummy_physical_memory_init(void); void dummy_physical_memory_cleanup(void); +void dummy_physical_memory_cleanup_many(phys_addr_t *base, int cnt); +phys_addr_t dummy_physical_memory_base(void); void parse_args(int argc, char **argv); void test_fail(void);