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MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.19)[-0.951]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; PREVIOUSLY_DELIVERED(0.00)[ltp@lists.linux.it]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.cz:email,suse.cz:mid]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TO_DN_NONE(0.00)[]; RCVD_TLS_ALL(0.00)[] X-Virus-Scanned: clamav-milter 1.0.9 at in-5.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH v2 28/31] testcases: sysfs: Add sys_hugepages02 X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" A test for /sys/kernel/mm/hugepages/* files. Signed-off-by: Cyril Hrubis --- runtest/sysfs | 1 + .../sysfs/kernel/mm/hugepages/.gitignore | 1 + .../kernel/mm/hugepages/sys_hugepages02.c | 84 +++++++++++++++++++ 3 files changed, 86 insertions(+) create mode 100644 testcases/kernel/sysfs/kernel/mm/hugepages/sys_hugepages02.c diff --git a/runtest/sysfs b/runtest/sysfs index a81fbc12e..ec38d8b44 100644 --- a/runtest/sysfs +++ b/runtest/sysfs @@ -23,3 +23,4 @@ sys_block_loop01 sys_block_loop01 sys_block_queue01 sys_block_queue01 sys_block_size01 sys_block_size01 sys_hugepages01 sys_hugepages01 +sys_hugepages02 sys_hugepages02 diff --git a/testcases/kernel/sysfs/kernel/mm/hugepages/.gitignore b/testcases/kernel/sysfs/kernel/mm/hugepages/.gitignore index 1c66028fb..1bebeb2c0 100644 --- a/testcases/kernel/sysfs/kernel/mm/hugepages/.gitignore +++ b/testcases/kernel/sysfs/kernel/mm/hugepages/.gitignore @@ -1 +1,2 @@ /sys_hugepages01 +/sys_hugepages02 diff --git a/testcases/kernel/sysfs/kernel/mm/hugepages/sys_hugepages02.c b/testcases/kernel/sysfs/kernel/mm/hugepages/sys_hugepages02.c new file mode 100644 index 000000000..29d89d491 --- /dev/null +++ b/testcases/kernel/sysfs/kernel/mm/hugepages/sys_hugepages02.c @@ -0,0 +1,84 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2026 Cyril Hrubis + */ + +/*\ + * Cross-checks the default hugepage pool in sysfs against /proc/meminfo. + * + * /proc/meminfo describes the default hugepage size pool, which corresponds to + * one of the hugepages-kB directories under /sys/kernel/mm/hugepages/. + * The test verifies that for the default pool: + * + * - Hugepagesize in /proc/meminfo matches the default pool directory size + * - HugePages_Total matches nr_hugepages + * - HugePages_Free matches free_hugepages + * - HugePages_Rsvd matches resv_hugepages + * - HugePages_Surp matches surplus_hugepages + * + * The test skips with TCONF when hugepages are not available. + */ + +#include +#include +#include "tst_test.h" +#include "tst_sysfs_assert.h" + +#define HUGEPAGES "/sys/kernel/mm/hugepages" + +static void compare(const char *what, const char *meminfo_key, const char *attr, + long hugepagesize) +{ + char path[PATH_MAX]; + long meminfo_val, sysfs_val; + + SAFE_FILE_LINES_SCANF("/proc/meminfo", meminfo_key, &meminfo_val); + + snprintf(path, sizeof(path), HUGEPAGES "/hugepages-%ldkB/%s", + hugepagesize, attr); + SAFE_FILE_SCANF(path, "%ld", &sysfs_val); + + if (meminfo_val == sysfs_val) { + tst_res(TPASS, "%s: /proc/meminfo (%ld) == %s (%ld)", + what, meminfo_val, attr, sysfs_val); + } else { + tst_res(TFAIL, "%s: /proc/meminfo (%ld) != %s (%ld)", + what, meminfo_val, attr, sysfs_val); + } +} + +static void do_test(void) +{ + long hugepagesize; + + SAFE_FILE_LINES_SCANF("/proc/meminfo", "Hugepagesize: %ld", + &hugepagesize); + + if (!tst_sysfs_exists(HUGEPAGES "/hugepages-%ldkB", hugepagesize)) { + tst_res(TCONF, + "Default hugepage pool hugepages-%ldkB not found in sysfs", + hugepagesize); + return; + } + + tst_res(TPASS, + "/proc/meminfo Hugepagesize (%ld kB) has a matching sysfs pool", + hugepagesize); + + compare("HugePages_Total", "HugePages_Total: %ld", + "nr_hugepages", hugepagesize); + compare("HugePages_Free", "HugePages_Free: %ld", + "free_hugepages", hugepagesize); + compare("HugePages_Rsvd", "HugePages_Rsvd: %ld", + "resv_hugepages", hugepagesize); + compare("HugePages_Surp", "HugePages_Surp: %ld", + "surplus_hugepages", hugepagesize); +} + +static struct tst_test test = { + .test_all = do_test, + .needs_kconfigs = (const char *const[]){ + "CONFIG_HUGETLBFS=y", + NULL + }, +}; -- 2.54.0 -- Mailing list info: https://lists.linux.it/listinfo/ltp