On Sat, Sep 7, 2013 at 11:08 AM, Ian Jeffray <[email protected]> wrote: > All, > > A previously stable solid system Core2 upgraded from 3.9.2 to > 3.11 is now showing oops's more than every 24 hours. > > Would appreciate any advice on how to begin to help debug this > as it appears to be deep in areas of the kernel I'm unfamiliar > with (I generally just tickle drivers)
First you have to find the exact release which introduced the regression. E.g. 3.10-rcX. > TIA, > > Ian. > > > BUG: unable to handle kernel NULL pointer dereference at (null) > IP: [<c10e6b40>] drop_buffers+0x20/0xa0 > *pde = 00000000 > Oops: 0000 [#1] SMP > Modules linked in: bttv tveeprom btcx_risc videobuf_dma_sg videobuf_core > ahci libahci > CPU: 0 PID: 507 Comm: kswapd0 Not tainted 3.11.0 #2 > Hardware name: System manufacturer P5KC/P5KC, BIOS 0701 07/03/2007 > task: f618a680 ti: f611e000 task.ti: f611e000 > EIP: 0060:[<c10e6b40>] EFLAGS: 00010286 CPU: 0 > EIP is at drop_buffers+0x20/0xa0 > EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: f611fd30 > ESI: f2d4df18 EDI: f700d620 EBP: f611fd28 ESP: f611fd18 > DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 > CR0: 8005003b CR2: 00000000 CR3: 01707000 CR4: 000007d0 > Stack: > f611fd30 f700d620 00000000 c18d59b4 f611fd40 c10e86ea 00000000 00000000 > 00000000 c18d59b4 f611fd50 c1092157 f700d634 f611ff30 f611fde8 c109dc26 > f611fda8 00000000 f611fe3c 00000000 f618a680 c1698480 f618a680 00000000 > Call Trace: > [<c10e86ea>] try_to_free_buffers+0x3a/0x90 > [<c1092157>] try_to_release_page+0x47/0x60 > [<c109dc26>] shrink_page_list+0x696/0x7d0 > [<c109ceb9>] ? isolate_lru_pages.isra.47+0x49/0xd0 > [<c109e24f>] shrink_inactive_list+0x1ef/0x350 > [<c109e802>] shrink_lruvec+0x452/0x590 > [<c109c89d>] ? zone_balanced+0x1d/0x30 > [<c109ecbe>] kswapd+0x37e/0x700 > [<c14f1639>] ? __schedule+0x1d9/0x650 > [<c109e940>] ? shrink_lruvec+0x590/0x590 > [<c104f8ef>] kthread+0x8f/0xa0 > [<c14f3437>] ret_from_kernel_thread+0x1b/0x28 > [<c104f860>] ? __kthread_parkme+0x60/0x60 > Code: 01 5b 5e 5f 5d c3 90 8d 74 26 00 55 89 e5 57 89 c7 56 53 83 ec 04 89 > 55 f0 8b 00 f6 c4 08 0f 84 81 00 00 00 8b 77 1c 89 f1 66 90 <8b> 01 f6 c4 08 > 74 0c 8b 47 04 85 c0 74 05 f0 80 48 4b 02 8b 19 > EIP: [<c10e6b40>] drop_buffers+0x20/0xa0 SS:ESP 0068:f611fd18 > CR2: 0000000000000000 > ---[ end trace 5439949abeda267a ]--- > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 507 at kernel/exit.c:703 do_exit+0x37/0x860() > Modules linked in: bttv tveeprom btcx_risc videobuf_dma_sg videobuf_core > ahci libahci > CPU: 0 PID: 507 Comm: kswapd0 Tainted: G D 3.11.0 #2 > Hardware name: System manufacturer P5KC/P5KC, BIOS 0701 07/03/2007 > 00000000 00000000 f611fb34 c14eec5c 00000000 f611fb64 c1037fda c15af4a4 > 00000000 000001fb c15ad72d 000002bf c10394d7 c10394d7 00000009 00000246 > f618a680 f611fb74 c103801d 00000009 00000000 f611fbcc c10394d7 00000000 > Call Trace: > [<c14eec5c>] dump_stack+0x41/0x52 > [<c1037fda>] warn_slowpath_common+0x7a/0xa0 > [<c10394d7>] ? do_exit+0x37/0x860 > [<c10394d7>] ? do_exit+0x37/0x860 > [<c103801d>] warn_slowpath_null+0x1d/0x20 > [<c10394d7>] do_exit+0x37/0x860 > [<c14eb9a1>] ? printk+0x38/0x3a > [<c1037f5a>] ? print_oops_end_marker+0x2a/0x30 > [<c1005067>] oops_end+0x67/0x90 > [<c14eaf9c>] no_context+0x188/0x190 > [<c14eb26d>] __bad_area_nosemaphore+0x128/0x130 > [<c129bd68>] ? blk_queue_bio+0x238/0x2b0 > [<c1093e9e>] ? mempool_alloc_slab+0xe/0x10 > [<c102f060>] ? vmalloc_sync_all+0x100/0x100 > [<c14eb287>] bad_area_nosemaphore+0x12/0x14 > [<c102edcd>] __do_page_fault+0x28d/0x420 > [<c10987ec>] ? test_set_page_writeback+0x9c/0x140 > [<c10b76ed>] ? __swap_writepage+0x13d/0x1e0 > [<c102f060>] ? vmalloc_sync_all+0x100/0x100 > [<c102f068>] do_page_fault+0x8/0x10 > [<c14f3246>] error_code+0x5a/0x60 > [<c102f060>] ? vmalloc_sync_all+0x100/0x100 > [<c10e6b40>] ? drop_buffers+0x20/0xa0 > [<c10e86ea>] try_to_free_buffers+0x3a/0x90 > [<c1092157>] try_to_release_page+0x47/0x60 > [<c109dc26>] shrink_page_list+0x696/0x7d0 > [<c109ceb9>] ? isolate_lru_pages.isra.47+0x49/0xd0 > [<c109e24f>] shrink_inactive_list+0x1ef/0x350 > [<c109e802>] shrink_lruvec+0x452/0x590 > [<c109c89d>] ? zone_balanced+0x1d/0x30 > [<c109ecbe>] kswapd+0x37e/0x700 > [<c14f1639>] ? __schedule+0x1d9/0x650 > [<c109e940>] ? shrink_lruvec+0x590/0x590 > [<c104f8ef>] kthread+0x8f/0xa0 > [<c14f3437>] ret_from_kernel_thread+0x1b/0x28 > [<c104f860>] ? __kthread_parkme+0x60/0x60 > ---[ end trace 5439949abeda267b ]--- > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
