Le 26/04/2019 à 06:54, Serge Belyshev a écrit :
Hi! Commit 63b2bc61956 aka "powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX"
caused my old powerbook to crash under I/O. After "dd if=/dev/hda of=/null"
the crash happens in seconds. Reverting the commit helps, as well as
disabling STRICT_KERNEL_RWX. Unfortunately, I was unable to capture the oops
via the usb serial console, as it stuck right after the first "BUG: Unable to
handle kernel data access at 0xe0c29000" message. Oops screenshot:
http://aargh.no-ip.org/oops.jpg
Hi Serge,
Could you please compile your kernel with CONFIG_PPC_PTDUMP, and provide
the content of:
/sys/kernel/debug/kernel_page_tables
/sys/kernel/debug/powerpc/block_address_translation
/sys/kernel/debug/powerpc/segment_registers
Please also provide the begining of 'dmesg' that shows the memory layout.
Thanks
Christophe
