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Sun, 16 Oct 2022 12:59:31 +0000 (GMT) Received: from tarunpc.ibmuc.com (unknown [9.43.63.52]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Sun, 16 Oct 2022 12:59:31 +0000 (GMT) From: Tarun Sahu To: ltp@lists.linux.it Date: Sun, 16 Oct 2022 18:27:25 +0530 Message-Id: <20221016125731.249078-24-tsahu@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221016125731.249078-1-tsahu@linux.ibm.com> References: <20221016125731.249078-1-tsahu@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: BON75nMSdFs7cuNBgvx0joP44Mv4NboD X-Proofpoint-GUID: BON75nMSdFs7cuNBgvx0joP44Mv4NboD X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-16_09,2022-10-14_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 priorityscore=1501 phishscore=0 impostorscore=0 lowpriorityscore=0 malwarescore=0 mlxscore=0 spamscore=0 clxscore=1015 suspectscore=0 mlxlogscore=966 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210160077 X-Virus-Scanned: clamav-milter 0.102.4 at in-4.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH 23/29] Hugetlb: Migrating libhugetlbfs noresv-reserve-resv-page 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: , Cc: aneesh.kumar@linux.ibm.com, sbhat@linux.ibm.com, vaibhav@linux.ibm.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Migrating the libhugetlbfs/testcases/noresv-preserve-resv-page.c test Test Description: Test to preserve a reserved page against no-reserved mapping. If all hugepages are reserved, access to no-reserved shared mapping cause a process die, instead of stealing a hugepage which is reserved for other process. Signed-off-by: Tarun Sahu --- runtest/hugetlb | 1 + testcases/kernel/mem/.gitignore | 1 + .../kernel/mem/hugetlb/hugemmap/hugemmap27.c | 166 ++++++++++++++++++ 3 files changed, 168 insertions(+) create mode 100644 testcases/kernel/mem/hugetlb/hugemmap/hugemmap27.c diff --git a/runtest/hugetlb b/runtest/hugetlb index 2c65c1439..c1c2c38bf 100644 --- a/runtest/hugetlb +++ b/runtest/hugetlb @@ -27,6 +27,7 @@ hugemmap22 hugemmap22 -T 2 -s 5 hugemmap23 hugemmap23 hugemmap25 hugemmap25 hugemmap26 hugemmap26 +hugemmap27 hugemmap27 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 4886c6a5f..9862414c6 100644 --- a/testcases/kernel/mem/.gitignore +++ b/testcases/kernel/mem/.gitignore @@ -26,6 +26,7 @@ /hugetlb/hugemmap/hugemmap23 /hugetlb/hugemmap/hugemmap25 /hugetlb/hugemmap/hugemmap26 +/hugetlb/hugemmap/hugemmap27 /hugetlb/hugeshmat/hugeshmat01 /hugetlb/hugeshmat/hugeshmat02 /hugetlb/hugeshmat/hugeshmat03 diff --git a/testcases/kernel/mem/hugetlb/hugemmap/hugemmap27.c b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap27.c new file mode 100644 index 000000000..eeab19f41 --- /dev/null +++ b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap27.c @@ -0,0 +1,166 @@ +// SPDX-License-Identifier: LGPL-2.1-or-later +/* + * Copyright (C) 2013 Joonsoo Kim, LG Electronics. + * + * Test Name: noresv-preserve-resv-page + * + * Test Description: Test to preserve a reserved page against no-reserved + * mapping. If all hugepages are reserved, access to no-reserved shared + * mapping cause a process die, instead of stealing a hugepage which is + * reserved for other process. + * + * HISTORY + * Written by Joonsoo Kim + * + */ + +#define _GNU_SOURCE +#include +#include +#include +#include +#include +#include + +#include "tst_test.h" + +#ifndef barrier +# ifdef mb + /* Redefining the memory barrier */ +# define barrier() mb() +# else +# define barrier() __asm__ __volatile__ ("" : : : "memory") +# endif +#endif + +static char *verbose; +static char hfile1[MAXPATHLEN], hfile2[MAXPATHLEN]; +static long hpage_size; +static int fd1 = -1, fd2 = -1; +static sigjmp_buf sig_escape; +static void *sig_expected = MAP_FAILED; + +static void sig_handler(int signum, siginfo_t *si, void *uc) +{ + (void)uc; + if (signum == SIGBUS) { + if (verbose) + tst_res(TINFO, "SIGBUS at %p (sig_expected=%p)\n", si->si_addr, + sig_expected); + if (si->si_addr == sig_expected) + siglongjmp(sig_escape, 1); + tst_res(TFAIL, "SIGBUS somewhere unexpected"); + goto fail; + } + tst_res(TFAIL, "Unexpected signal %s", strsignal(signum)); +fail: + tst_brk(TBROK, "Once failed, No Point in continuing further"); +} + +static int test_write(void *p) +{ + volatile char *pl = p; + + if (sigsetjmp(sig_escape, 1)) { + /* We got a SIGBUS */ + tst_res(TPASS, "Successful"); + return 1; + } + + sig_expected = p; + barrier(); + *pl = 's'; + return 0; +} + +static void run_test(void) +{ + int nr_hugepages; + int surp_hugepages; + int ret; + char *p, *q; + struct sigaction sa = { + .sa_sigaction = sig_handler, + .sa_flags = SA_SIGINFO, + }; + + nr_hugepages = SAFE_READ_MEMINFO("HugePages_Free:"); + + fd1 = SAFE_OPEN(hfile1, O_RDWR | O_CREAT, 0600); + SAFE_UNLINK(hfile1); + + fd2 = SAFE_OPEN(hfile2, O_RDWR | O_CREAT, 0600); + SAFE_UNLINK(hfile2); + + SAFE_SIGACTION(SIGBUS, &sa, NULL); + + p = SAFE_MMAP(NULL, hpage_size * nr_hugepages, + PROT_READ | PROT_WRITE, MAP_SHARED, fd1, 0); + + if (verbose) + tst_res(TINFO, "Reserve all hugepages %d", nr_hugepages); + + q = SAFE_MMAP(NULL, hpage_size, + PROT_READ | PROT_WRITE, MAP_SHARED | MAP_NORESERVE, fd2, 0); + + if (verbose) + tst_res(TINFO, "Write to %p to steal reserved page", q); + + surp_hugepages = SAFE_READ_MEMINFO("HugePages_Surp:"); + ret = test_write(q); + if (ret == 1) + goto pass; + /* Provisioning succeeded because of overcommit */ + if (SAFE_READ_MEMINFO("HugePages_Surp:") == + surp_hugepages + 1) { + tst_res(TPASS, "Successful"); + goto pass; + } + + tst_res(TFAIL, "Steal reserved page"); + tst_brk(TBROK, "Once failed, No point in continuing the test"); +pass: + SAFE_MUNMAP(p, hpage_size * nr_hugepages); + SAFE_MUNMAP(q, hpage_size); + SAFE_CLOSE(fd1); + SAFE_CLOSE(fd2); +} + +static void setup(void) +{ + if (tst_hugepages < 2) + tst_brk(TCONF, "Not enough hugepages for testing."); + + if (!Hopt) + Hopt = tst_get_tmpdir(); + SAFE_MOUNT("none", Hopt, "hugetlbfs", 0, NULL); + + snprintf(hfile1, sizeof(hfile1), "%s/ltp_mmap1file%d", Hopt, getpid()); + snprintf(hfile2, sizeof(hfile2), "%s/ltp_mmap2file%d", Hopt, getpid()); + + hpage_size = SAFE_READ_MEMINFO("Hugepagesize:")*1024; +} + +static void cleanup(void) +{ + if (fd1 >= 0) + SAFE_CLOSE(fd1); + if (fd2 >= 0) + SAFE_CLOSE(fd2); + umount2(Hopt, MNT_DETACH); +} + +static struct tst_test test = { + .needs_root = 1, + .needs_tmpdir = 1, + .options = (struct tst_option[]) { + {"v", &verbose, "Turns on verbose mode"}, + {"H:", &Hopt, "Location of hugetlbfs, i.e. -H /var/hugetlbfs"}, + {"s:", &nr_opt, "Set the number of the been allocated hugepages"}, + {} + }, + .setup = setup, + .cleanup = cleanup, + .test_all = run_test, + .hugepages = {2, TST_REQUEST}, +}; -- 2.31.1 -- Mailing list info: https://lists.linux.it/listinfo/ltp