Hi,
> user% ./fd-exhaustion # e.g. while(1) open("/dev/null",...);
> root# cat /proc/sys/fs/file-nr
> cat: /proc/sys/fs/file-nr: Too many open files in system
>
> The above happens even with increased NR_RESERVED_FILES to 96 [no
> wonder, get_empty_filp is broken].
no, it is not broken. But your experiment is broken. Don't do cat file-nr
but compile this C program
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int fd, len;
static char buf[2048];
fd = open("/proc/sys/fs/file-nr", O_RDONLY);
if (fd == -1) {
perror("open");
exit(1);
}
while (1) {
len = read(fd, buf, 1024);
printf("len=%d %s", len, buf);
lseek(fd, 0, SEEK_SET);
sleep(1);
}
return 0;
}
and leave it running while doing experiments on the other console. You
will see that everything is fine -- there is no bug. No wonder you saw the
bug -- you ignored my 4 emails telling you otherwise :)
Regards,
Tigran
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