Hi... On Tue, Oct 27, 2009 at 8:27 PM, loody <miloody@xxxxxxxxx> wrote: > Dear all: > I use kernel 2.6.18 and I get the kernel panic as below: > Unhandled kernel unaligned access[#1]: > Cpu 0 > $ 0 : 00000000 11000001 0000040a 8721f0d8 > $ 4 : 874a6c00 80001d18 00000000 00000000 > $ 8 : 00000000 ffffa438 00000000 874c2000 > $12 : 00000000 00000000 00005800 00011000 > $16 : 80001d10 874a6c40 874a6c00 87d7bf00 > $20 : 874a6c78 871a0000 87370000 874a6c80 > $24 : 00000000 2aacc770 > $28 : 87d7a000 87d7be88 ffffa438 8709ed20 > Hi : 00000000 > Lo : 00000000 > epc : 8709e72c sync_sb_inodes+0x9c/0x320 Not tainted > ra : 8709ed20 writeback_inodes+0xb4/0x160 Hmmm, your machine is not x86, is it? So, I guess this panic is caused by unaligned memory access. AFAIK, in certain architecture, accessing memory at address not a multiple of its word size might cause trap. So, for example if it is a CPU with 4 byte word size, then accessing memory at 0x00000005 will cause panic. > my questions are: > 1. what does "Not tainted" mean? AFAIK, it means no non GPL-ed kernel module are currently inserted. > 2. I grep the kernel and I find the above message comes from do_ade in > unaligned.c, If I guess correctly. > but from the call trace I cannot find out who call it. > who and how kernel pass the information to do_ade? Likely it is part of trap handler.... thus it is installed as interrupt handler. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
