On Thu, Feb 13, 2003 at 01:13:44PM -0800, Andrew Morton wrote:
> Was this test frequently opening and closing device nodes, or does it just
> open them once and hold them?
Opens once only.
> Can you please prepare a testcase which I can use to reproduce this?
I have only been able to reproduce it on the qla2300 running the latest
qla2300 driver. So maybe it is a qla only problem (blah).
As per previous oops reports by wli and Martin, running with the qlogicisp
driver on the isp1020 gives an oops in isp1020_intr_handler :(
I'm rebooting again.
I was running this program, simultaneously one per drive up to 25, so I
should have only one IO outstanding per disk (added the O_DIRECT):
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
int
main (int argc, char **argv)
{
int fd;
int loop_cnt;
char *dev_name;
int block_size = 512;
char buff[4096], *bufp;
int res;
dev_name = argv[1];
loop_cnt = atoi(argv[2]);
fprintf(stderr, "Re-reading device %s with %d iterations\n",
dev_name, loop_cnt);
fd = open (dev_name, O_RDONLY | O_DIRECT);
if (fd == -1) {
perror("open");
exit(1);
}
/* memset(buff, 'x', block_size); */
bufp = (char*) ((int)(buff + 4096) & 0xfffff000);
fprintf(stderr, "bufp is 0x%x; buff is 0x%x\n", bufp, buff);
while (loop_cnt-- > 0) {
#ifdef NOTNOW
#endif
res = read(fd, bufp, block_size);
if (res != block_size) {
fprintf(stderr, "Read only %d bytes of %d, cnt %d\n",
res, block_size, loop_cnt);
exit(1);
}
res = lseek(fd, 0, SEEK_SET);
if (res == -1) {
perror("lseek");
exit(1);
}
}
close(fd);
}
-- Patrick Mansfield
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This archive was generated by hypermail 2b29 : Sat Feb 15 2003 - 22:00:50 EST