xv6/stressfs.c
Russ Cox 1a81e38b17 make new code like old code
Variable declarations at top of function,
separate from initialization.

Use == 0 instead of ! for checking pointers.

Consistent spacing around {, *, casts.

Declare 0-parameter functions as (void) not ().

Integer valued functions return -1 on failure, 0 on success.
2011-01-11 13:01:13 -05:00

37 lines
747 B
C

// Demonstrate that moving the "acquire" in iderw after the loop that
// appends to the idequeue results in a race.
// For this to work, you should also add a spin within iderw's
// idequeue traversal loop. Spinning 40000 times demonstrated the bug
// after about 5 runs of stressfs in QEMU on a 2.1GHz CPU.
#include "types.h"
#include "stat.h"
#include "user.h"
#include "fs.h"
#include "fcntl.h"
int
main(int argc, char *argv[])
{
int fd, i;
char path[] = "stressfs0";
printf(1, "stressfs starting\n");
for(i = 0; i < 4; i++)
if(fork() > 0)
break;
printf(1, "%d\n", i);
path[8] += i;
fd = open(path, O_CREATE | O_RDWR);
for(i = 0; i < 100; i++)
printf(fd, "%d\n", i);
close(fd);
wait();
exit();
}