From patchwork Mon Sep 11 08:02:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Wang X-Patchwork-Id: 1832186 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=JbQ1PzKV; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it (client-ip=213.254.12.146; helo=picard.linux.it; envelope-from=ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it; receiver=patchwork.ozlabs.org) Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RkfMp6HtJz1yhL for ; Mon, 11 Sep 2023 18:02:46 +1000 (AEST) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 7E0813CB3DD for ; Mon, 11 Sep 2023 10:02:44 +0200 (CEST) X-Original-To: ltp@lists.linux.it Delivered-To: ltp@picard.linux.it Received: from in-7.smtp.seeweb.it (in-7.smtp.seeweb.it [217.194.8.7]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id EA09E3CB382 for ; Mon, 11 Sep 2023 10:02:41 +0200 (CEST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-7.smtp.seeweb.it (Postfix) with ESMTPS id 0764920118E for ; Mon, 11 Sep 2023 10:02:40 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1694419359; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Dpi/sS7XZmMpRIp7b0yMImtW+GLz30qJGDRA1TPd638=; b=JbQ1PzKV0JXsTbdI50Khf4Jc8DY3+gXK8Najl3ZlEI0yHDXsAHIIwTVPyOC7ueCUM53R/I Tv/kUYoEY3v/8V7hCANOslSpHj4tJ+U3dLbthjvLWZo13OcwgdNS/cn916mc0NTC6Ck0FE GMi4c28he6gs8G9Z5y011w2pYo+g1BA= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-450-gcoFPfu6NXGokjyLcIJI2Q-1; Mon, 11 Sep 2023 04:02:37 -0400 X-MC-Unique: gcoFPfu6NXGokjyLcIJI2Q-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B082729ABA09 for ; Mon, 11 Sep 2023 08:02:37 +0000 (UTC) Received: from liwang-workstation.lab.eng.nay.redhat.com (unknown [10.66.145.229]) by smtp.corp.redhat.com (Postfix) with ESMTPS id BEBAA2027045 for ; Mon, 11 Sep 2023 08:02:36 +0000 (UTC) From: Li Wang To: ltp@lists.linux.it Date: Mon, 11 Sep 2023 16:02:32 +0800 Message-Id: <20230911080233.1305942-1-liwang@redhat.com> In-Reply-To: <20230524093930.43971-1-liwang@redhat.com> References: <20230524093930.43971-1-liwang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Virus-Scanned: clamav-milter 1.0.1 at in-7.smtp.seeweb.it X-Virus-Status: Clean X-Spam-Status: No, score=0.1 required=7.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=disabled version=4.0.0 X-Spam-Checker-Version: SpamAssassin 4.0.0 (2022-12-13) on in-7.smtp.seeweb.it Subject: [LTP] [PATCH v2 1/2] lib: add support for kinds of hpsize reservation 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: , Errors-To: ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it Sender: "ltp" Typically when we make use of huge page via LTP library, .hugepages choose the default hugepage size, but this can not satisfy all scenarios. So this patch introduces applying a specified hpsize huge page for user. There is nothing that needs to change for the existing test cases which already using .hugepages, it only needs to fill one more field in the structure of .hugepages if a different hpsize is required. e.g. static struct tst_test test = { .needs_root = 1, ... .hugepages = {2, TST_NEEDS, 1024 * 1024}, }; Signed-off-by: Li Wang --- Notes: V1 --> V2 * check if the specific hugepage size exist or not * guarantee the HugePages_Free-$(size)kB as expected * print the reserved hugepage size doc/c-test-api.txt | 38 ++++++++++++++++++++++++++++++++++++-- include/tst_hugepage.h | 1 + lib/tst_hugepage.c | 33 ++++++++++++++++++++++++++------- 3 files changed, 63 insertions(+), 9 deletions(-) diff --git a/doc/c-test-api.txt b/doc/c-test-api.txt index f692909e2..ec728cf8a 100644 --- a/doc/c-test-api.txt +++ b/doc/c-test-api.txt @@ -2034,9 +2034,15 @@ For full documentation see the comments in 'include/tst_fuzzy_sync.h'. ~~~~~~~~~~~~~~~~~~~~~~~~ Many of the LTP tests need to use hugepage in their testing, this allows the -test can reserve hugepages from system via '.hugepages = {xx, TST_REQUEST}'. +test can reserve specify size of hugepages from system via: + '.hugepages = {xx, TST_REQUEST, yy}'. -We achieved two policies for reserving hugepages: +xx: This is used to set how many pages we wanted. + +yy: This is used to specify the size of the hugepage. + (If not set it will use the default hugepage size) + +Two policies for reserving hugepages: TST_REQUEST: It will try the best to reserve available huge pages and return the number @@ -2103,6 +2109,34 @@ struct tst_test test = { }; ------------------------------------------------------------------------------- +or, + +[source,c] +------------------------------------------------------------------------------- +#include "tst_test.h" +#define GIGANTIC_PGSZ 1024 * 1024 + +static void run(void) +{ + ... +} + +static void setup(void) +{ + /* + * Specify hpsize reserved automatically in the library + * $ echo 2 > /sys/kernel/mm//hugepages/hugepages-1048576kB/nr_hugepages + * Do check if 2 hpages are reserved correctly in there + */ +} + +struct tst_test test = { + .test_all = run, + .hugepages = {2, TST_NEEDS, GIGANTIC_PGSZ}, + ... +}; +------------------------------------------------------------------------------- + 1.35 Checking for required commands ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/include/tst_hugepage.h b/include/tst_hugepage.h index 46327c79a..e96bfbe53 100644 --- a/include/tst_hugepage.h +++ b/include/tst_hugepage.h @@ -27,6 +27,7 @@ enum tst_hp_policy { struct tst_hugepage { const unsigned long number; enum tst_hp_policy policy; + const unsigned long hpsize; }; /* diff --git a/lib/tst_hugepage.c b/lib/tst_hugepage.c index d2e70a955..f4b18bbbf 100644 --- a/lib/tst_hugepage.c +++ b/lib/tst_hugepage.c @@ -5,6 +5,7 @@ #define TST_NO_DEFAULT_MAIN +#include #include "tst_test.h" #include "tst_hugepage.h" @@ -22,9 +23,10 @@ size_t tst_get_hugepage_size(void) unsigned long tst_reserve_hugepages(struct tst_hugepage *hp) { - unsigned long val, max_hpages; + unsigned long val, max_hpages, hpsize; + char hugepage_path[PATH_MAX]; struct tst_path_val pvl = { - .path = PATH_NR_HPAGES, + .path = hugepage_path, .val = NULL, .flags = TST_SR_SKIP_MISSING | TST_SR_TCONF_RO }; @@ -41,6 +43,19 @@ unsigned long tst_reserve_hugepages(struct tst_hugepage *hp) else tst_hugepages = hp->number; + if (hp->hpsize) + hpsize = hp->hpsize; + else + hpsize = SAFE_READ_MEMINFO(MEMINFO_HPAGE_SIZE); + + sprintf(hugepage_path, PATH_HUGEPAGES"/hugepages-%lukB/nr_hugepages", hpsize); + if (access(hugepage_path, F_OK)) { + if (hp->policy == TST_NEEDS) + tst_brk(TCONF, "Hugepage size %lu not supported", hpsize); + tst_hugepages = 0; + goto out; + } + if (hp->number == TST_NO_HUGEPAGES) { tst_hugepages = 0; goto set_hugepages; @@ -53,7 +68,7 @@ unsigned long tst_reserve_hugepages(struct tst_hugepage *hp) goto set_hugepages; } - max_hpages = SAFE_READ_MEMINFO("MemFree:") / SAFE_READ_MEMINFO("Hugepagesize:"); + max_hpages = SAFE_READ_MEMINFO("MemFree:") / hpsize; if (tst_hugepages > max_hpages) { tst_res(TINFO, "Requested number(%lu) of hugepages is too large, " "limiting to 80%% of the max hugepage count %lu", @@ -66,22 +81,26 @@ unsigned long tst_reserve_hugepages(struct tst_hugepage *hp) set_hugepages: tst_sys_conf_save(&pvl); - SAFE_FILE_PRINTF(PATH_NR_HPAGES, "%lu", tst_hugepages); - SAFE_FILE_SCANF(PATH_NR_HPAGES, "%lu", &val); + + SAFE_FILE_PRINTF(hugepage_path, "%lu", tst_hugepages); + SAFE_FILE_SCANF(hugepage_path, "%lu", &val); + if (val != tst_hugepages) tst_brk(TCONF, "nr_hugepages = %lu, but expect %lu. " "Not enough hugepages for testing.", val, tst_hugepages); if (hp->policy == TST_NEEDS) { - unsigned long free_hpages = SAFE_READ_MEMINFO("HugePages_Free:"); + unsigned long free_hpages; + sprintf(hugepage_path, PATH_HUGEPAGES"/hugepages-%lukB/free_hugepages", hpsize); + SAFE_FILE_SCANF(hugepage_path, "%lu", &free_hpages); if (hp->number > free_hpages) tst_brk(TCONF, "free_hpages = %lu, but expect %lu. " "Not enough hugepages for testing.", free_hpages, hp->number); } - tst_res(TINFO, "%lu hugepage(s) reserved", tst_hugepages); + tst_res(TINFO, "%lu (%luMB) hugepage(s) reserved", tst_hugepages, hpsize/1024); out: return tst_hugepages; } From patchwork Mon Sep 11 08:02:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Wang X-Patchwork-Id: 1832187 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=PyMYdiSf; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it (client-ip=213.254.12.146; helo=picard.linux.it; envelope-from=ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it; 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Mon, 11 Sep 2023 08:02:39 +0000 (UTC) Received: from liwang-workstation.lab.eng.nay.redhat.com (unknown [10.66.145.229]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4DF722027045 for ; Mon, 11 Sep 2023 08:02:38 +0000 (UTC) From: Li Wang To: ltp@lists.linux.it Date: Mon, 11 Sep 2023 16:02:33 +0800 Message-Id: <20230911080233.1305942-2-liwang@redhat.com> In-Reply-To: <20230911080233.1305942-1-liwang@redhat.com> References: <20230524093930.43971-1-liwang@redhat.com> <20230911080233.1305942-1-liwang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Virus-Scanned: clamav-milter 1.0.1 at in-7.smtp.seeweb.it X-Virus-Status: Clean X-Spam-Status: No, score=0.1 required=7.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=disabled version=4.0.0 X-Spam-Checker-Version: SpamAssassin 4.0.0 (2022-12-13) on in-7.smtp.seeweb.it Subject: [LTP] [PATCH v2 2/2] hugemmap34: Test to detect bug with migrating gigantic pages 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: , Errors-To: ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it Sender: "ltp" Signed-off-by: Li Wang --- Notes: V1 --> V2 * make use of safe macros * remove unnecessary .supported_archs * remove unuseed numa.h runtest/hugetlb | 1 + testcases/kernel/mem/.gitignore | 1 + .../kernel/mem/hugetlb/hugemmap/hugemmap34.c | 134 ++++++++++++++++++ 3 files changed, 136 insertions(+) create mode 100644 testcases/kernel/mem/hugetlb/hugemmap/hugemmap34.c diff --git a/runtest/hugetlb b/runtest/hugetlb index 299c07ac9..0c812c780 100644 --- a/runtest/hugetlb +++ b/runtest/hugetlb @@ -35,6 +35,7 @@ hugemmap29 hugemmap29 hugemmap30 hugemmap30 hugemmap31 hugemmap31 hugemmap32 hugemmap32 +hugemmap34 hugemmap34 hugemmap05_1 hugemmap05 -m hugemmap05_2 hugemmap05 -s hugemmap05_3 hugemmap05 -s -m diff --git a/testcases/kernel/mem/.gitignore b/testcases/kernel/mem/.gitignore index 7258489ed..41f547edf 100644 --- a/testcases/kernel/mem/.gitignore +++ b/testcases/kernel/mem/.gitignore @@ -34,6 +34,7 @@ /hugetlb/hugemmap/hugemmap30 /hugetlb/hugemmap/hugemmap31 /hugetlb/hugemmap/hugemmap32 +/hugetlb/hugemmap/hugemmap34 /hugetlb/hugeshmat/hugeshmat01 /hugetlb/hugeshmat/hugeshmat02 /hugetlb/hugeshmat/hugeshmat03 diff --git a/testcases/kernel/mem/hugetlb/hugemmap/hugemmap34.c b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap34.c new file mode 100644 index 000000000..3743a54d2 --- /dev/null +++ b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap34.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) Linux Test Project, 2023 + * Copyright (C) 2023, Red Hat, Inc. + * + * Author: David Hildenbrand + * Port-to-LTP: Li Wang + */ + +/*\ + * [Description] + * + * Migration code will first unmap the old page and replace the present PTE + * by a migration entry. Then migrate the page. Once that succeeded (and there + * are no unexpected page references), we replace the migration entries by + * proper present PTEs pointing at the new page. + * + * For ordinary pages we handle PTEs. For 2 MiB hugetlb/THP, it's PMDs. + * For 1 GiB hugetlb, it's PUDs. + * + * So without below commit, GUP-fast code was simply not aware that we could + * have migration entries stored in PUDs. Migration + GUP-fast code should be + * able to handle any such races. + * + * For example, GUP-fast will re-verify the PUD after pinning to make sure it + * didn't change. If it did change, it backs off. + * + * Migration code should detect the additional page references and back off + * as well. + * + * commit 15494520b776aa2eadc3e2fefae524764cab9cea + * Author: Qiujun Huang + * Date: Thu Jan 30 22:12:10 2020 -0800 + * + * mm: fix gup_pud_range + * + */ + +#define _GNU_SOURCE +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "lapi/syscalls.h" +#include "tst_safe_pthread.h" +#include "numa_helper.h" +#include "hugetlb.h" + +#define GIGANTIC_PGSZ 1024 * 1024 + +static char *mem; +static size_t pagesize; +static size_t hugetlbsize; +static volatile int looping = 1; + +static void *migration_thread_fn(void *arg LTP_ATTRIBUTE_UNUSED) +{ + while (looping) { + TST_EXP_PASS_SILENT(syscall(__NR_mbind, mem, hugetlbsize, + MPOL_LOCAL, NULL, 0x7fful, MPOL_MF_MOVE)); + } + + return NULL; +} + +static void run_test(void) +{ + ssize_t transferred; + struct iovec iov; + int fds[2]; + + pthread_t migration_thread; + + pagesize = getpagesize(); + hugetlbsize = 1 * 1024 * 1024 * 1024u; + + mem = mmap(NULL, hugetlbsize, PROT_READ|PROT_WRITE, + MAP_PRIVATE|MAP_ANON|MAP_HUGETLB|MAP_HUGE_1GB, + -1, 0); + if (mem == MAP_FAILED) + tst_brk(TBROK | TERRNO, "mmap() failed"); + + memset(mem, 1, hugetlbsize); + + /* Keep migrating the page around ... */ + SAFE_PTHREAD_CREATE(&migration_thread, NULL, migration_thread_fn, NULL); + + while (looping) { + SAFE_PIPE(fds); + + iov.iov_base = mem; + iov.iov_len = pagesize; + transferred = vmsplice(fds[1], &iov, 1, 0); + if (transferred <= 0) + tst_brk(TBROK | TERRNO, "vmsplice() failed"); + + SAFE_CLOSE(fds[0]); + SAFE_CLOSE(fds[1]); + + if (!tst_remaining_runtime()) { + tst_res(TINFO, "Runtime exhausted, exiting"); + looping = 0; + } + } + + SAFE_PTHREAD_JOIN(migration_thread, NULL); + + if (tst_taint_check()) + tst_res(TFAIL, "Test resulted in kernel tainted"); + else + tst_res(TPASS, "Test completed successfully"); +} + +static struct tst_test test = { + .needs_root = 1, + .test_all = run_test, + .max_runtime = 60, + .taint_check = TST_TAINT_W | TST_TAINT_D, + .hugepages = {2, TST_NEEDS, GIGANTIC_PGSZ}, + .needs_kconfigs = (const char *const[]){ + "CONFIG_NUMA=y", + NULL + }, + .tags = (struct tst_tag[]) { + {"linux-git", "15494520b776"}, + {} + }, +};