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    SubjectRe: 2.6.9 kernel oops with openais
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    Date
    On Fri, 2004-10-29 at 15:51 -0700, Steven Dake wrote:
    > Mark,
    >
    > Have you seen the following oops in 2.6.x? I can generate it easily
    > with two nodes by letting openais run for 15-20 seconds on 2.6.9.
    >
    > I had to turn mlockall off in order to get openais to run in the first
    > place, otherwise openais runs out of ram which causes a memset to a null
    > address in parse.c (we should fix that:). Have you had problems with
    > mlock when working with a 2.6 kernel?

    Funny that you should ask. Just this afternoon I updated one of my
    machines from 2.6.8-rc4 to 2.6.10-rc1 and saw the memset problem. (I
    got around it by commenting out the group.conf file). And then got a
    segfault later. I didn't see a kernel panic though since I couldn't get
    it to run that long. I don't know about any mlock problems. Maybe the
    kernel mailing list archives has something.


    Mark.

    >
    > <1>Unable to handle kernel NULL pointer dereference at virtual address
    > 0000000c
    > printing eip:
    > c016dd7b
    > *pde = 00000000
    > Oops: 0000 [#2]
    > PREEMPT SMP
    > Modules linked in:
    > CPU: 2
    > EIP: 0060:[<c016dd7b>] Not tainted VLI
    > EFLAGS: 00010286 (2.6.9)
    > EIP is at dnotify_flush+0x1e/0xad
    > eax: 00000000 ebx: f6cdfb80 ecx: 00000000 edx: f6cdfb80
    > esi: 00000000 edi: f7baf880 ebp: f6cdfb80 esp: f6cefd50
    > ds: 007b es: 007b ss: 0068
    > Process aisexec (pid: 929, threadinfo=f6cee000 task=f7cc2810)
    > Stack: c0154240 f7224a70 f7cdea80 f6cdfb80 00000000 f7baf880 f7baf880
    > c0152a6f
    > f6cdfb80 f7baf880 00000005 00000007 0000000f c011e344 f6cdfb80
    > f7baf880
    > 00000020 00000001 f7baf880 f7cc2d38 f7cc2810 f7a9a0ac c011f11e
    > f7cc2810
    > Call Trace:
    > [<c0154240>] __fput+0x86/0xd4
    > [<c0152a6f>] filp_close+0x46/0x86
    > [<c011e344>] put_files_struct+0x87/0xec
    > [<c011f11e>] do_exit+0x1a8/0x360
    > [<c01070fd>] do_divide_error+0x0/0x13e
    > [<c0116640>] do_page_fault+0x251/0x5af
    > [<c0108aa3>] do_IRQ+0xd2/0x139
    > [<c033b760>] move_addr_to_user+0x5c/0x67
    > [<c033d815>] sys_recvmsg+0x21d/0x226
    > [<c033f3ec>] release_sock+0x1b/0x71
    > [<c033f3a7>] lock_sock+0x17/0x41
    > [<c01555d7>] invalidate_inode_buffers+0x1b/0x7e
    > [<c01163ef>] do_page_fault+0x0/0x5af
    > [<c01068e5>] error_code+0x2d/0x38
    > [<c033c550>] sock_poll+0xe/0x31
    > [<c01664c1>] do_pollfd+0x8c/0x90
    > [<c016652b>] do_poll+0x66/0xc6
    > [<c01666cb>] sys_poll+0x140/0x1fd
    > [<c0165a45>] __pollwait+0x0/0xc5
    > [<c0105e7b>] syscall_call+0x7/0xb
    >
    --
    Mark Haverkamp <markh@osdl.org>

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