Hello, I have tried to untar the sources of 2.6.21-rc4 kernel. My SS20 runs with 2.6.20.3/SMP. [/usr/src] > tar xvfj linux-2.6.21-rc4.tar.bz2 ends with: ble to handle kernel NULL pointer dereference tsk->{mm,active_mm}->context = 00000c70 tsk->{mm,active_mm}->pgd = fc10c800 \|/ ____ \|/ "@'/ ,. \`@" /_| \__/ |_\ \__U_/ bzip2(3097): Oops [#1] PSR: 400000c4 PC: f00862a4 NPC: f00862a8 Y: 00000000 Not tainted PC: <pipe_write+0x2d8/0x520> %G: fb04dd08 000000d8 00001000 00000001 fb04de14 00000000 fb04c000 50027b80 %O: fa67ced8 5001d000 00000400 00000000 00002fe4 00000000 fb04dd08 f008601c RPC: <pipe_write+0x50/0x520> %L: fa67ce64 00000400 fbdb5ad8 00000000 0000000c 00000000 fb04c000 00000400 %I: 00000000 fb04de60 fbdb5a00 00000000 fa67ced8 fb6e37a0 fb04dd70 f007f618 Caller[f007f618]: do_sync_write+0xa4/0xdc Caller[f007fed8]: vfs_write+0xa0/0x16c Caller[f0080730]: sys_write+0x38/0x64 Caller[f00158e0]: syscall_is_too_hard+0x3c/0x40 Caller[500a387c]: 0x500a3884 Instruction DUMP: a4068001 e604a00c c404a004 <c204c000> 80a06000 02bfff68 d004a008 aa008008 03000004 Unable to handle kernel NULL pointer dereference tsk->{mm,active_mm}->context = 00000c6e tsk->{mm,active_mm}->pgd = fc0e4c00 \|/ ____ \|/ "@'/ ,. \`@" /_| \__/ |_\ \__U_/ tar(3096): Oops [#2] PSR: 400000c2 PC: f0086654 NPC: f0086658 Y: 00000000 Not tainted PC: <pipe_read+0x110/0x4d4> %G: fa43e000 000000d8 00000080 f08a1a00 fbdb5a00 70726f63 fa43e000 00000000 %O: fbdb5a00 f08a1a00 f10d0000 3634342c 0a09092e 70726f63 fa43fcf8 f00869a8 RPC: <pipe_read+0x464/0x4d4> %L: 00000000 00000000 f10d0400 00000001 fbdb5a00 00000c00 fbdb5ad8 00001c00 %I: efffefff 00000001 fa43fe60 00000008 00000000 f10d0000 fa43fd70 f007f6f4 Caller[f007f6f4]: do_sync_read+0xa4/0xdc Caller[f0080044]: vfs_read+0xa0/0x16c Caller[f00806cc]: sys_read+0x38/0x64 Caller[f00158e0]: syscall_is_too_hard+0x3c/0x40 Caller[0003dfcc]: 0x3dfd4 Instruction DUMP: ac050001 f805a00c e005a008 <c207200c> 9fc04000 92100016 80a22000 128000b2 c407a048 Configuration is available at http://rayleigh.systella.fr/~bertrand/sparc32.config Regards, JKB - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html