| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2004 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Name: hugemmap02 |
| * |
| * Test Description: There is both a low hugepage region (at 2-3G for use by |
| * 32-bit processes) and a high hugepage region (at 1-1.5T). The high region |
| * is always exclusively for hugepages, but the low region has to be activated |
| * before it can be used for hugepages. When the kernel attempts to do a |
| * hugepage mapping in a 32-bit process it will automatically attempt to open |
| * the low region. However, that will fail if there are any normal |
| * (non-hugepage) mappings in the region already. |
| * |
| * When run as a 64-bit process the kernel will still do a non-hugepage mapping |
| * in the low region, but the following hugepage mapping will succeed. This is |
| * because it comes from the high region, which is available to the 64-bit |
| * process. |
| * |
| * This test case is checking this behavior. |
| * |
| * HISTORY |
| * 04/2004 Written by Robbie Williamson |
| */ |
| |
| #include <sys/types.h> |
| #include <sys/mman.h> |
| #include <sys/mount.h> |
| #include <sys/stat.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <signal.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "test.h" |
| #include "usctest.h" |
| #include "safe_macros.h" |
| #include "mem.h" |
| |
| #define LOW_ADDR (void *)(0x80000000) |
| #define LOW_ADDR2 (void *)(0x90000000) |
| |
| static char TEMPFILE[MAXPATHLEN]; |
| |
| char *TCID = "hugemmap02"; |
| int TST_TOTAL = 1; |
| static unsigned long *addr; |
| static unsigned long *addr2; |
| static unsigned long *addrlist[5]; |
| static int i; |
| static int fildes; |
| static int nfildes; |
| static char *Hopt; |
| static char *nr_opt; |
| static long hugepages = 128; |
| static long orig_hugepages; |
| |
| static void help(void); |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| char *msg; |
| int Hflag = 0; |
| long page_sz, map_sz; |
| int sflag = 0; |
| |
| option_t options[] = { |
| {"H:", &Hflag, &Hopt}, |
| {"s:", &sflag, &nr_opt}, |
| {NULL, NULL, NULL} |
| }; |
| |
| msg = parse_opts(ac, av, options, &help); |
| if (msg) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s," |
| " use -help", msg); |
| |
| if (!Hflag) { |
| tst_tmpdir(); |
| Hopt = get_tst_tmpdir(); |
| } |
| if (sflag) |
| hugepages = SAFE_STRTOL(NULL, nr_opt, 0, LONG_MAX); |
| |
| page_sz = getpagesize(); |
| map_sz = read_meminfo("Hugepagesize:") * 1024 * 2; |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| /* Creat a temporary file used for huge mapping */ |
| fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666); |
| if (fildes < 0) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "opening %s failed", TEMPFILE); |
| |
| /* Creat a file used for normal mapping */ |
| nfildes = open("/dev/zero", O_RDONLY, 0666); |
| if (nfildes < 0) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "opening /dev/zero failed"); |
| |
| Tst_count = 0; |
| |
| /* |
| * Call mmap on /dev/zero 5 times |
| */ |
| for (i = 0; i < 5; i++) { |
| addr = mmap(0, 256 * 1024 * 1024, PROT_READ, |
| MAP_SHARED, nfildes, 0); |
| addrlist[i] = addr; |
| } |
| |
| /* mmap using normal pages and a low memory address */ |
| addr = mmap(LOW_ADDR, page_sz, PROT_READ, |
| MAP_SHARED | MAP_FIXED, nfildes, 0); |
| if (addr == MAP_FAILED) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "mmap failed on nfildes"); |
| |
| /* Attempt to mmap a huge page into a low memory address */ |
| addr2 = mmap(LOW_ADDR2, map_sz, PROT_READ | PROT_WRITE, |
| MAP_SHARED, fildes, 0); |
| #if __WORDSIZE == 64 /* 64-bit process */ |
| if (addr2 == MAP_FAILED) { |
| tst_resm(TFAIL | TERRNO, "huge mmap failed unexpectedly" |
| " with %s (64-bit)", TEMPFILE); |
| close(fildes); |
| continue; |
| } else { |
| tst_resm(TPASS, "huge mmap succeeded (64-bit)"); |
| } |
| #else /* 32-bit process */ |
| if (addr2 == MAP_FAILED) |
| tst_resm(TFAIL | TERRNO, "huge mmap failed unexpectedly" |
| " with %s (32-bit)", TEMPFILE); |
| else if (addr2 > 0) { |
| tst_resm(TCONF, |
| "huge mmap failed to test the scenario"); |
| close(fildes); |
| continue; |
| } else if (addr == 0) |
| tst_resm(TPASS, "huge mmap succeeded (32-bit)"); |
| #endif |
| |
| /* Clean up things in case we are looping */ |
| for (i = 0; i < 5; i++) { |
| if (munmap(addrlist[i], 256 * 1024 * 1024) == -1) |
| tst_resm(TBROK | TERRNO, |
| "munmap of addrlist[%d] failed", i); |
| } |
| |
| #if __WORDSIZE == 64 |
| if (munmap(addr2, map_sz) == -1) |
| tst_brkm(TFAIL | TERRNO, NULL, "huge munmap failed"); |
| #endif |
| if (munmap(addr, page_sz) == -1) |
| tst_brkm(TFAIL | TERRNO, NULL, "munmap failed"); |
| |
| close(fildes); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| void setup(void) |
| { |
| TEST_PAUSE; |
| tst_require_root(NULL); |
| if (mount("none", Hopt, "hugetlbfs", 0, NULL) < 0) |
| tst_brkm(TBROK | TERRNO, NULL, "mount failed on %s", Hopt); |
| orig_hugepages = get_sys_tune("nr_hugepages"); |
| set_sys_tune("nr_hugepages", hugepages, 1); |
| snprintf(TEMPFILE, sizeof(TEMPFILE), "%s/mmapfile%d", Hopt, getpid()); |
| } |
| |
| void cleanup(void) |
| { |
| TEST_CLEANUP; |
| |
| unlink(TEMPFILE); |
| set_sys_tune("nr_hugepages", orig_hugepages, 0); |
| |
| umount(Hopt); |
| tst_rmdir(); |
| } |
| |
| static void help(void) |
| { |
| printf(" -H /.. Location of hugetlbfs, i.e. -H /var/hugetlbfs\n"); |
| printf(" -s num Set the number of the been allocated hugepages\n"); |
| } |