/* * * A test for the patch "Allow compaction of unevictable pages". * With this patch we should be able to allocate at least 1/4 * of RAM in huge pages. Without the patch much less is * allocated. */ #include #include #include #include #include #include #include #include #define MAP_SIZE 1048576 struct map_list { void *map; struct map_list *next; }; int read_memory_info(unsigned long *memfree, unsigned long *hugepagesize) { char buffer[256] = {0}; char *cmd = "cat /proc/meminfo | grep -i memfree | grep -o '[0-9]*'"; FILE *cmdfile = popen(cmd, "r"); if (!(fgets(buffer, sizeof(buffer), cmdfile))) { perror("Failed to read meminfo\n"); return -1; } pclose(cmdfile); *memfree = atoll(buffer); cmd = "cat /proc/meminfo | grep -i hugepagesize | grep -o '[0-9]*'"; cmdfile = popen(cmd, "r"); if (!(fgets(buffer, sizeof(buffer), cmdfile))) { perror("Failed to read meminfo\n"); return -1; } pclose(cmdfile); *hugepagesize = atoll(buffer); return 0; } int prereq(void) { char allowed; int fd; fd = open("/proc/sys/vm/compact_unevictable_allowed", O_RDONLY | O_NONBLOCK); if (fd < 0) { perror("Failed to open\n" "/proc/sys/vm/compact_unevictable_allowed\n"); return -1; } if (read(fd, &allowed, sizeof(char)) != sizeof(char)) { perror("Failed to read from\n" "/proc/sys/vm/compact_unevictable_allowed\n"); close(fd); return -1; } close(fd); if (allowed == '1') return 0; return -1; } int check_compaction(unsigned long mem_free, unsigned int hugepage_size) { int fd; int compaction_index = 0; char initial_nr_hugepages[10] = {0}; char nr_hugepages[10] = {0}; /* We want to test with 80% of available memory. Else, OOM killer comes in to play */ mem_free = mem_free * 0.8; fd = open("/proc/sys/vm/nr_hugepages", O_RDWR | O_NONBLOCK); if (fd < 0) { perror("Failed to open /proc/sys/vm/nr_hugepages"); return -1; } if (read(fd, initial_nr_hugepages, sizeof(initial_nr_hugepages)) <= 0) { perror("Failed to read from /proc/sys/vm/nr_hugepages"); goto close_fd; } /* Start with the initial condition of 0 huge pages*/ if (write(fd, "0", sizeof(char)) != sizeof(char)) { perror("Failed to write 0 to /proc/sys/vm/nr_hugepages\n"); goto close_fd; } lseek(fd, 0, SEEK_SET); /* Request a large number of huge pages. The Kernel will allocate as much as it can */ if (write(fd, "100000", (6*sizeof(char))) != (6*sizeof(char))) { perror("Failed to write 100000 to /proc/sys/vm/nr_hugepages\n"); goto close_fd; } lseek(fd, 0, SEEK_SET); if (read(fd, nr_hugepages, sizeof(nr_hugepages)) <= 0) { perror("Failed to re-read from /proc/sys/vm/nr_hugepages\n"); goto close_fd; } /* We should have been able to request at least 1/3 rd of the memory in huge pages */ compaction_index = mem_free/(atoi(nr_hugepages) * hugepage_size); if (compaction_index > 3) { printf("No of huge pages allocated = %d\n", (atoi(nr_hugepages))); fprintf(stderr, "ERROR: Less that 1/%d of memory is available\n" "as huge pages\n", compaction_index); goto close_fd; } printf("No of huge pages allocated = %d\n", (atoi(nr_hugepages))); if (write(fd, initial_nr_hugepages, strlen(initial_nr_hugepages)) != strlen(initial_nr_hugepages)) { perror("Failed to write value to /proc/sys/vm/nr_hugepages\n"); goto close_fd; } close(fd); return 0; close_fd: close(fd); printf("Not OK. Compaction test failed."); return -1; } int main(int argc, char **argv) { struct rlimit lim; struct map_list *list, *entry; size_t page_size, i; void *map = NULL; unsigned long mem_free = 0; unsigned long hugepage_size = 0; unsigned long mem_fragmentable = 0; if (prereq() != 0) { printf("Either the sysctl compact_unevictable_allowed is not\n" "set to 1 or couldn't read the proc file.\n" "Skipping the test\n"); return 0; } lim.rlim_cur = RLIM_INFINITY; lim.rlim_max = RLIM_INFINITY; if (setrlimit(RLIMIT_MEMLOCK, &lim)) { perror("Failed to set rlimit:\n"); return -1; } page_size = getpagesize(); list = NULL; if (read_memory_info(&mem_free, &hugepage_size) != 0) { printf("ERROR: Cannot read meminfo\n"); return -1; } mem_fragmentable = mem_free * 0.8 / 1024; while (mem_fragmentable > 0) { map = mmap(NULL, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_LOCKED, -1, 0); if (map == MAP_FAILED) break; entry = malloc(sizeof(struct map_list)); if (!entry) { munmap(map, MAP_SIZE); break; } entry->map = map; entry->next = list; list = entry; /* Write something (in this case the address of the map) to * ensure that KSM can't merge the mapped pages */ for (i = 0; i < MAP_SIZE; i += page_size) *(unsigned long *)(map + i) = (unsigned long)map + i; mem_fragmentable--; } for (entry = list; entry != NULL; entry = entry->next) { munmap(entry->map, MAP_SIZE); if (!entry->next) break; entry = entry->next; } if (check_compaction(mem_free, hugepage_size) == 0) return 0; return -1; } 976a6014d534ce3035909'>patch) tree6064ddf732b21c686c958cb9da73f6eae6de5a27 /tools/nfsd/inject_fault.sh parent3f5c34c6d4688b3b7e1dbc7bbc68a2f03a0d6b0c (diff)
Input: synaptics-rmi4 - fix reversed conditions in enable/disable_irq_wake
These tests are reversed. A warning should be displayed if an error is returned, not on success. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'tools/nfsd/inject_fault.sh')