A Sexta, 23 de Abril de 2010 17:37:03 me@xxxxxxxxxxxxxxx escreveu: > On Fri, Apr 23, 2010 at 09:48:23AM -0400, John W. Linville wrote: > > > a) is it "normal"? I thought modules were somewhat isolated these days. > > > b) any advices for debugging? I've yet to have two oopses that are > > > similar.... > > Advice for debugging: turn on slub/slab debug options, and possibly > kmemcheck. kmemcheck was very helpful for me last time I had such > a corruption issue. For some reason I am unable to get a kernel I compiled to boot. Since I was unable to compile the kernel with those debugging options, I just turned on slub_debug on GRUB. I got a few messages which I pasting here only partially to check for their significance. If significant I'll post them fully: [ 2658.663308] ============================================================================= [ 2658.663424] BUG kmalloc-4096: Poison overwritten [ 2658.663483] ----------------------------------------------------------------------------- [ 2658.663486] [ 2658.663606] INFO: 0xed3db0c0-0xed3db0cf. First byte 0xc4 instead of 0x6b [ 2658.663698] INFO: Allocated in ath_rxbuf_alloc+0x30/0xa0 [ath] age=7117 cpu=0 pid=0 [ 2658.663799] INFO: Freed in skb_release_data+0x70/0xa0 age=0 cpu=0 pid=0 [ 2658.663882] INFO: Slab 0xc15fbb00 objects=7 used=5 fp=0xed3db090 flags=0x400040c3 [ 2658.663975] INFO: Object 0xed3db090 @offset=12432 fp=0xed3da060 [ 2658.663977] [ 2658.664069] Bytes b4 0xed3db080: 00 00 00 00 61 ff 08 00 5a 5a 5a 5a 5a 5a 5a 5a ....a<FF>..ZZZZZZZZ [ 2658.664258] Object 0xed3db090: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk (a lot of lines with memory contents omitted) [ 2658.667258] Redzone 0xed3dc090: bb bb bb bb <BB><BB><BB><BB> [ 2658.667258] Padding 0xed3dc0b8: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ [ 2658.667258] Pid: 0, comm: swapper Not tainted 2.6.32-21-generic #32-Ubuntu [ 2658.667258] Call Trace: [ 2658.667258] [<c01faf63>] print_trailer+0xd3/0x120 [ 2658.667258] [<c01fb07c>] check_bytes_and_report+0xcc/0xf0 [ 2658.667258] [<c01fc021>] check_object+0x1a1/0x1e0 [ 2658.667258] [<c01fcc98>] alloc_debug_processing+0xc8/0x190 (...) [ 2658.667258] FIX kmalloc-4096: Restoring 0xed3db0c0-0xed3db0cf=0x6b [ 2658.667258] [ 2658.667258] FIX kmalloc-4096: Marking all objects used [ 4689.941595] And I've two or three more similar messages. The system was apparently stable in the morning though I had an error on the console: [24370.460011] Pid: 2011, comm: kismet_server Not tainted 2.6.32-21-generic #32-Ubuntu [24370.460011] Call Trace: (...) The latest daily from Ubuntu PPA wouldn't boot, the one from 2 or 3 days ago did, if needed I can install that one. Were those lines significant and shall I post them here? Thank you for your time, -- Pedro -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
