robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright (c) International Business Machines Corp., 2004 |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 13 | * the GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
Wanlong Gao | 4548c6c | 2012-10-19 18:03:36 +0800 | [diff] [blame] | 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * Test Name: hugemmap02 |
| 22 | * |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 23 | * Test Description: There is both a low hugepage region (at 2-3G for use by |
| 24 | * 32-bit processes) and a high hugepage region (at 1-1.5T). The high region |
| 25 | * is always exclusively for hugepages, but the low region has to be activated |
| 26 | * before it can be used for hugepages. When the kernel attempts to do a |
| 27 | * hugepage mapping in a 32-bit process it will automatically attempt to open |
| 28 | * the low region. However, that will fail if there are any normal |
| 29 | * (non-hugepage) mappings in the region already. |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 30 | * |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 31 | * When run as a 64-bit process the kernel will still do a non-hugepage mapping |
| 32 | * in the low region, but the following hugepage mapping will succeed. This is |
| 33 | * because it comes from the high region, which is available to the 64-bit |
| 34 | * process. |
| 35 | * |
| 36 | * This test case is checking this behavior. |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 37 | * |
| 38 | * HISTORY |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 39 | * 04/2004 Written by Robbie Williamson |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 40 | */ |
| 41 | |
Caspar Zhang | 79667fa | 2012-03-12 14:41:46 +0800 | [diff] [blame] | 42 | #include <sys/types.h> |
| 43 | #include <sys/mman.h> |
| 44 | #include <sys/mount.h> |
| 45 | #include <sys/stat.h> |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 46 | #include <errno.h> |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 47 | #include <fcntl.h> |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 48 | #include <signal.h> |
| 49 | #include <stdint.h> |
Caspar Zhang | 79667fa | 2012-03-12 14:41:46 +0800 | [diff] [blame] | 50 | #include <stdio.h> |
| 51 | #include <stdlib.h> |
| 52 | #include <string.h> |
| 53 | #include <unistd.h> |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 54 | |
| 55 | #include "test.h" |
Wanlong Gao | 56d368c | 2012-02-10 11:16:22 +0800 | [diff] [blame] | 56 | #include "safe_macros.h" |
Caspar Zhang | 79667fa | 2012-03-12 14:41:46 +0800 | [diff] [blame] | 57 | #include "mem.h" |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 58 | |
subrata_modak | 9c92901 | 2008-10-21 08:49:00 +0000 | [diff] [blame] | 59 | #define LOW_ADDR (void *)(0x80000000) |
| 60 | #define LOW_ADDR2 (void *)(0x90000000) |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 61 | |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 62 | static char TEMPFILE[MAXPATHLEN]; |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 63 | |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 64 | char *TCID = "hugemmap02"; |
| 65 | int TST_TOTAL = 1; |
| 66 | static unsigned long *addr; |
| 67 | static unsigned long *addr2; |
| 68 | static unsigned long *addrlist[5]; |
| 69 | static int i; |
| 70 | static int fildes; |
| 71 | static int nfildes; |
| 72 | static char *Hopt; |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 73 | static char *nr_opt; |
| 74 | static long hugepages = 128; |
| 75 | static long orig_hugepages; |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 76 | |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 77 | static void help(void); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 78 | |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 79 | int main(int ac, char **av) |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 80 | { |
Garrett Cooper | 22cd8d1 | 2010-12-16 21:53:13 -0800 | [diff] [blame] | 81 | int lc; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 82 | const char *msg; |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 83 | int Hflag = 0; |
Caspar Zhang | 51725fc | 2012-03-13 11:02:55 +0800 | [diff] [blame] | 84 | long page_sz, map_sz; |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 85 | int sflag = 0; |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 86 | |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 87 | option_t options[] = { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 88 | {"H:", &Hflag, &Hopt}, |
| 89 | {"s:", &sflag, &nr_opt}, |
| 90 | {NULL, NULL, NULL} |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 91 | }; |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 92 | |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 93 | msg = parse_opts(ac, av, options, &help); |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 94 | if (msg) |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 95 | tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s," |
| 96 | " use -help", msg); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 97 | |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 98 | if (!Hflag) { |
| 99 | tst_tmpdir(); |
Cyril Hrubis | 9c31ad2 | 2014-05-14 17:15:39 +0200 | [diff] [blame] | 100 | Hopt = tst_get_tmpdir(); |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 101 | } |
Wanlong Gao | 56d368c | 2012-02-10 11:16:22 +0800 | [diff] [blame] | 102 | if (sflag) |
| 103 | hugepages = SAFE_STRTOL(NULL, nr_opt, 0, LONG_MAX); |
subrata_modak | bdbaec5 | 2009-02-26 12:14:51 +0000 | [diff] [blame] | 104 | |
Garrett Cooper | 71543af | 2011-04-21 20:24:03 -0700 | [diff] [blame] | 105 | page_sz = getpagesize(); |
Caspar Zhang | 51725fc | 2012-03-13 11:02:55 +0800 | [diff] [blame] | 106 | map_sz = read_meminfo("Hugepagesize:") * 1024 * 2; |
Garrett Cooper | 71543af | 2011-04-21 20:24:03 -0700 | [diff] [blame] | 107 | |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 108 | setup(); |
| 109 | |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 110 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 111 | /* Creat a temporary file used for huge mapping */ |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 112 | fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666); |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 113 | if (fildes < 0) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 114 | tst_brkm(TBROK | TERRNO, cleanup, |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 115 | "opening %s failed", TEMPFILE); |
subrata_modak | bdbaec5 | 2009-02-26 12:14:51 +0000 | [diff] [blame] | 116 | |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 117 | /* Creat a file used for normal mapping */ |
| 118 | nfildes = open("/dev/zero", O_RDONLY, 0666); |
| 119 | if (nfildes < 0) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 120 | tst_brkm(TBROK | TERRNO, cleanup, |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 121 | "opening /dev/zero failed"); |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 122 | |
Caspar Zhang | d59a659 | 2013-03-07 14:59:12 +0800 | [diff] [blame] | 123 | tst_count = 0; |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 124 | |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 125 | /* |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 126 | * Call mmap on /dev/zero 5 times |
| 127 | */ |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 128 | for (i = 0; i < 5; i++) { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 129 | addr = mmap(0, 256 * 1024 * 1024, PROT_READ, |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 130 | MAP_SHARED, nfildes, 0); |
| 131 | addrlist[i] = addr; |
| 132 | } |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 133 | |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 134 | /* mmap using normal pages and a low memory address */ |
Garrett Cooper | 71543af | 2011-04-21 20:24:03 -0700 | [diff] [blame] | 135 | addr = mmap(LOW_ADDR, page_sz, PROT_READ, |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 136 | MAP_SHARED | MAP_FIXED, nfildes, 0); |
| 137 | if (addr == MAP_FAILED) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 138 | tst_brkm(TBROK | TERRNO, cleanup, |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 139 | "mmap failed on nfildes"); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 140 | |
| 141 | /* Attempt to mmap a huge page into a low memory address */ |
Garrett Cooper | 71543af | 2011-04-21 20:24:03 -0700 | [diff] [blame] | 142 | addr2 = mmap(LOW_ADDR2, map_sz, PROT_READ | PROT_WRITE, |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 143 | MAP_SHARED, fildes, 0); |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 144 | #if __WORDSIZE == 64 /* 64-bit process */ |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 145 | if (addr2 == MAP_FAILED) { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 146 | tst_resm(TFAIL | TERRNO, "huge mmap failed unexpectedly" |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 147 | " with %s (64-bit)", TEMPFILE); |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 148 | close(fildes); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 149 | continue; |
| 150 | } else { |
Garrett Cooper | 22cd8d1 | 2010-12-16 21:53:13 -0800 | [diff] [blame] | 151 | tst_resm(TPASS, "huge mmap succeeded (64-bit)"); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 152 | } |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 153 | #else /* 32-bit process */ |
Garrett Cooper | 22cd8d1 | 2010-12-16 21:53:13 -0800 | [diff] [blame] | 154 | if (addr2 == MAP_FAILED) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 155 | tst_resm(TFAIL | TERRNO, "huge mmap failed unexpectedly" |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 156 | " with %s (32-bit)", TEMPFILE); |
Garrett Cooper | 22cd8d1 | 2010-12-16 21:53:13 -0800 | [diff] [blame] | 157 | else if (addr2 > 0) { |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 158 | tst_resm(TCONF, |
| 159 | "huge mmap failed to test the scenario"); |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 160 | close(fildes); |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 161 | continue; |
| 162 | } else if (addr == 0) |
| 163 | tst_resm(TPASS, "huge mmap succeeded (32-bit)"); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 164 | #endif |
| 165 | |
| 166 | /* Clean up things in case we are looping */ |
| 167 | for (i = 0; i < 5; i++) { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 168 | if (munmap(addrlist[i], 256 * 1024 * 1024) == -1) |
| 169 | tst_resm(TBROK | TERRNO, |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 170 | "munmap of addrlist[%d] failed", i); |
| 171 | } |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 172 | |
Garrett Cooper | 22cd8d1 | 2010-12-16 21:53:13 -0800 | [diff] [blame] | 173 | #if __WORDSIZE == 64 |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 174 | if (munmap(addr2, map_sz) == -1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 175 | tst_brkm(TFAIL | TERRNO, NULL, "huge munmap failed"); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 176 | #endif |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 177 | if (munmap(addr, page_sz) == -1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 178 | tst_brkm(TFAIL | TERRNO, NULL, "munmap failed"); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 179 | |
| 180 | close(fildes); |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 181 | } |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 182 | |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 183 | cleanup(); |
Garrett Cooper | 22cd8d1 | 2010-12-16 21:53:13 -0800 | [diff] [blame] | 184 | tst_exit(); |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 185 | } |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 186 | |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 187 | void setup(void) |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 188 | { |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 189 | TEST_PAUSE; |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 190 | tst_require_root(NULL); |
| 191 | if (mount("none", Hopt, "hugetlbfs", 0, NULL) < 0) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 192 | tst_brkm(TBROK | TERRNO, NULL, "mount failed on %s", Hopt); |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 193 | orig_hugepages = get_sys_tune("nr_hugepages"); |
| 194 | set_sys_tune("nr_hugepages", hugepages, 1); |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 195 | snprintf(TEMPFILE, sizeof(TEMPFILE), "%s/mmapfile%d", Hopt, getpid()); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 196 | } |
| 197 | |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 198 | void cleanup(void) |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 199 | { |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 200 | unlink(TEMPFILE); |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 201 | set_sys_tune("nr_hugepages", orig_hugepages, 0); |
robbiew | f226d4b | 2004-04-20 17:27:30 +0000 | [diff] [blame] | 202 | |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 203 | umount(Hopt); |
Garrett Cooper | 22cd8d1 | 2010-12-16 21:53:13 -0800 | [diff] [blame] | 204 | tst_rmdir(); |
Garrett Cooper | 71543af | 2011-04-21 20:24:03 -0700 | [diff] [blame] | 205 | } |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 206 | |
| 207 | static void help(void) |
| 208 | { |
| 209 | printf(" -H /.. Location of hugetlbfs, i.e. -H /var/hugetlbfs\n"); |
Wanlong Gao | 9b4865f | 2012-02-08 17:13:51 +0800 | [diff] [blame] | 210 | printf(" -s num Set the number of the been allocated hugepages\n"); |
Wanlong Gao | 0be3a4e | 2012-02-06 11:16:24 +0800 | [diff] [blame] | 211 | } |