Re: something really screwed up with mmap+ffs on 5.0_STABLE

[Thomas Klausner <wiz%NetBSD.org@localhost>]

On Tue, Aug 17, 2010 at 11:52:31PM +0300, Antti Kantee wrote:
> It would be great if someone could confirm or debunk this on -current
> and for archs beyond i386.  Just get the latest sources, go to
> sys/rump/net/lib/libshmif, comment out line 61 (the one with PREFAULT_RW)
> from if_shmif.c, "make && make install", and run tests/net/icmp/t_ping
> floodping in a loop.  You should see a coredump within a few thousand
> iteratios (few minutes) if the problem is there.

I think you mean if_shmem.c.

I just tested this on 5.99.39/amd64.
# ./t_ping floodping
got 0/10000
passed
# while true; do ./t_ping floodping; done
panic: kernel diagnostic assertion "busmem->shm_magic == SHMIF_MAGIC" failed: 
file "if_shmem.c", line 287
panic: kernel diagnostic assertion "busmem->shm_magic == SHMIF_MAGIC" failed: 
file "if_shmem.c", line 287
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
panic: bus is not magical
...

Cheers,
 Thomas