On Fri, Dec 12, 2003 at 10:45:08AM +0000, Peter Horton wrote:
> More info on the random segmentation faults and data corruption on my Qube2.
> 2.4.21 from CVS is the first kernel to exhibit the problem. I tracked it
> down to the cache handling changes that went in between 2.4.20 and 2.4.21.
> By (not very scientifically) removing flush_dcache_page() and
> re-instating flush_page_to_ram() I managed to get the 2.4.21 kernel
> stable (see attached patch). Applying a similiar patch to 2.4.23 (CVS
> HEAD) allows me to run 2.4.23 too.
> I don't know how to track the problem any further - the kernel's cache
> handling is a bit out of my league.
> Anyone got a clue stick they can point me in the right direction with ?
Can you put a printk into c-r4k.c and print the value of the
shm_align_mask variable? I want to make sure it's got a sane value on
your box. Also the first few lines of your bootup messages with the
processor and cache stuff would be useful.