JFFS2 oops when writing to two partitions simultaneously

[Joakim Tjernlund]

>
> On 01/25/2012 08:53 PM, Orjan Friberg wrote:
> > I've boiled it down to whether CONFIG_PREEMPT (bug happens) or
> > CONFIG_PREEMPT_VOLUNTARY (bug doesn't happen) is selected.
>
> No, I haven't.  The problem disappeared only for
>
>    while :; do dd if=/dev/zero of=file bs=800 count=1; done
>
> That one-liner was boiled down from the following program, which still
> oopses instantly:
>
>    #include <stdio.h>
>    #include <unistd.h>
>    #include <sys/types.h>
>    #include <sys/stat.h>
>    #include <fcntl.h>
>
>    int main()
>    {
>      int fd;
>      struct stat st;
>      char buf[800];
>
>      do {
>        unlink("file2");
>        fd = open("file1", O_RDWR|O_CREAT|O_TRUNC, 0666);
>        stat("file1", &st);
>        lseek(fd, 0, SEEK_SET);
>        write(fd, buf, 800);
>        close(fd);
>        rename("file1", "file2");
>      } while (1);
>
>      return 0;
>    }

Works for me on PowerPC, 2.6.35, NOR flash

 Jocke