On Wed, Jun 23, 2010 at 8:54 PM, Lothar Wa?mann [off-list ref] wrote:

quoted

we have a strange problem when booting from a Compact Flash card
as root-device. In one of 10 cases while booting an application from
root-filesystem dies with "Segmentation fault" without a visible error.
After booting the same application runs hundred times without error.
(we're talking about standard appl. like chat, pppd, hwclock and so on)

For debugging purposes we put printk's in kernels IDE driver
and the problem disappeared. But replacing the printk by a usleep
or so (which is not a solution !) brings the problem back.
It seems that the application received faulty data from CF.
But how and why ?????????????????????????????

We tested with a custom PXA270 board with a CompactFlash in
"true ide" on processor bus driven by "generic ide / pata_platform"
driver from linux-2.6.27.x.
(by the way linux-2.6.20.x showed the same problem).

Any ideas, hints, experiences, patches are very welcome :-)
--------------------------------------------------------------

I guess that is the old cache problem that apparently was never really
fixed:
http://marc.info/?t=108537828400002&r=1&w=2

Catalin recently posted some patches addressing the cache
problem:

http://thread.gmane.org/gmane.linux.ports.arm.kernel/82987

Rabin