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    SubjectRe: 2.6.19-rc2-mm2
    On Fri, 20 Oct 2006 13:39:49 +0200
    Mariusz Kozlowski <m.kozlowski@tuxland.pl> wrote:

    > Hello,
    >
    > I installed 2.6.19-rc2-mm2 without kernel debugging options enabled first.
    > The output below is what I saw when the kernel started. Then I enabled
    > debugging and system hangs with oops with no trace in the logs. It is not
    > easily repeatable though. It happens from time to time.
    >
    > BUG: unable to handle kernel NULL pointer dereference at virtual address
    > 00000000
    > printing eip:
    > ded5bc12
    > *pde = 00000000
    > Oops: 0000 [#1]
    > PREEMPT
    > last sysfs
    > file: /class/pcmcia_socket/pcmcia_socket0/available_resources_setup_done
    > Modules linked in: pcmcia firmware_class yenta_socket rsrc_nonstatic
    > pcmcia_core
    > CPU: 0
    > EIP: 0060:[<ded5bc12>] Not tainted VLI
    > EFLAGS: 00010002 (2.6.19-rc2-mm2 #1)
    > EIP is at get_pcmcia_device+0x1e/0x93 [pcmcia]
    > eax: ddba2828 ebx: fffffff0 ecx: 00000000 edx: 00000000
    > esi: 00000000 edi: 00000000 ebp: 00000246 esp: ddac7f30
    > ds: 007b es: 007b ss: 0068
    > Process cardmgr (pid: 4807, ti=ddac6000 task=ddea7030 task.ti=ddac6000)
    > Stack: 40000000 00000000 c00c6409 ddba2828 ded5c777 00000001 00000000 ddba2400
    > 0000000c ddc4930c ded60040 dd5a21c0 bfc9a600 c00c6409 c01661d4 bfc9a600
    > dd5a21c0 dd5a21c0 00000004 ddac6000 c016622d 00000000 ddea7030 dd5a21c0
    > Call Trace:
    > [<ded5c777>] ds_ioctl+0x88b/0x89f [pcmcia]
    > [<c01661d4>] do_ioctl+0x64/0x6d
    > [<c016622d>] vfs_ioctl+0x50/0x27b
    > [<c016648c>] sys_ioctl+0x34/0x50
    > [<c0102eae>] sysenter_past_esp+0x5f/0x85
    > =======================
    > Code: 3f e1 89 d8 e8 f6 7e b1 ff 31 c0 5b c3 55 57 56 53 89 d7 9c 5d fa 89 e2
    > 81 e2 00 e0 ff ff 83 42 14 01 8b 90 44 01 00 00 8d 5a f0 <8b> 4b 10 0f 18 01
    > 90 8d b0 44 01 00 00 39 d6 75 12 eb 37 89 c8
    > EIP: [<ded5bc12>] get_pcmcia_device+0x1e/0x93 [pcmcia] SS:ESP 0068:ddac7f30
    > <6>note: cardmgr[4807] exited with preempt_count 1
    > pccard: PCMCIA card inserted into slot 1
    > cs: memory probe 0xa0000000-0xa0ffffff: clean.

    Don't know. Nothing has changed in the git-pcmcia tree since July.

    Are you able to bisect it, as per
    http://www.zip.com.au/~akpm/linux/patches/stuff/bisecting-mm-trees.txt ?

    > When running without debug options enabled also these were seen amongst dmesg
    > lines:
    >
    > [drm:radeon_cp_init] *ERROR* radeon_cp_init called without lock held
    > [drm:drm_unlock] *ERROR* Process 5131 using kernel context 0

    <googles>

    This? http://lkml.org/lkml/2005/9/10/78


    > When debug options were enabled these above disappeared. System info:
    >
    > Linux orion 2.6.19-rc2-mm2 #2 PREEMPT Fri Oct 20 13:14:25 CEST 2006 i686
    > Intel(R) Pentium(R) 4 CPU 2.40GHz GNU/Linux
    >
    > Gnu C 4.1.1
    > Gnu make 3.81
    > binutils 2.16.1
    > util-linux 2.12r
    > mount 2.12r
    > module-init-tools 3.2.2
    > e2fsprogs 1.39
    > pcmcia-cs 3.2.8
    > nfs-utils 1.0.6
    > Linux C Library > libc.2.4
    > Dynamic linker (ldd) 2.4
    > Procps 3.2.6
    > Net-tools 1.60
    > Kbd 1.12
    > Sh-utils 5.94
    > udev 087
    > Modules Loaded orinoco_cs orinoco hermes pcmcia firmware_class
    > yenta_socket rsrc_nonstatic pcmcia_core
    >
    > This time it _is_ -mm ;-)
    >

    Well... that's what it's for ;) Thanks for testing.
    -
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