Messages in this thread | | | Date | Mon, 18 Feb 2002 16:03:18 -0800 | From | William Lee Irwin III <> | Subject | Re: [TEST] page tables filling non-highmem |
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Okay, I hereby place this testcase under the GPL:
/* * death.c -- Testcase for pagetable memory management. * * Copyright (C) 2002 William Irwin * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#define __USE_LARGEFILE64 #include <stdio.h> #include <unistd.h> #include <sys/mman.h> #include <sys/stat.h> #include <sys/types.h> #define __USE_LARGEFILE64 #include <fcntl.h> #include <errno.h>
#define MAPPING_START 0x20000000 #define MAPPING_SIZE (0x80000000/sizeof(unsigned long)) #define MAPPING_END (MAPPING_START + MAPPING_SIZE*sizeof(unsigned long))
int main(void) { int fd; unsigned long *data = NULL; unsigned long try = 64; unsigned long k = 0;
fd = open("/home/wli/bench/mapfile", O_RDWR|O_LARGEFILE);
if (fd < 0) { perror("death"); printf("could not open mapfile!\n"); exit(1); }
data = mmap((void *)MAPPING_START, MAPPING_SIZE, PROT_READ|PROT_WRITE, MAP_FIXED | MAP_SHARED, fd, 0);
if (!try || data == MAP_FAILED) { printf("mmap() failed, tries = %lu!\n", 64 - try + 1); exit(1); }
printf("managed to mmap() at %p\n", (void *)data);
sleep(60);
try = 0; while (1) { printf("entered iteration %lu\n", k); data[k++] = try++; k %= MAPPING_SIZE; if (k >= MAPPING_SIZE-1) k = 0; } return 0; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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