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    SubjectRe: 2.6.35-rc3 -- kernel BUG at mm/vmalloc.c:216! - invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
    From
    On Thu, Jun 24, 2010 at 3:15 PM, Tejun Heo <htejun@gmail.com> wrote:
    > Hello,
    >
    > On 06/24/2010 07:22 AM, Xiaotian Feng wrote:
    >> I can reproduce it with the same ...
    >>
    >>> [ 1046.984453] kernel BUG at mm/vmalloc.c:216!
    >>> [ 1046.984463] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
    >>> [ 1046.984484] last sysfs file: /sys/devices/system/cpu/cpu1/crash_notes
    >>> [ 1046.984495] Modules linked in: aes_i586 aes_generic binfmt_misc
    >>> ipv6 snd_hda_codec_realtek arc4 snd_hda_intel ecb snd_hda_codec ath9k
    >>> snd_hwdep snd_pcm_oss ath9k_common snd_mixer_oss ath9k_hw snd_pcm
    >>> snd_seq_dummy ath snd_seq_oss snd_seq_midi snd_rawmidi mac80211
    >>> snd_seq_midi_event snd_seq snd_timer cfg80211 snd_seq_device rtc_cmos
    >>> snd rtc_core rtc_lib snd_page_alloc rng_core led_class processor
    >>> battery ac sg uhci_hcd ehci_hcd sd_mod usbcore thermal
    >>> [ 1046.984668]
    >>> [ 1046.984680] Pid: 15038, comm: head Not tainted 2.6.35-rc3 #1 1000HE/1000HE
    >>> [ 1046.984691] EIP: 0060:[<c10985de>] EFLAGS: 00010246 CPU: 0
    >>> [ 1046.984705] EIP is at vmalloc_to_page+0x16/0xd1
    >>> [ 1046.984714] EAX: 00000000 EBX: c1527000 ECX: c6e0b2a8 EDX: f7ffe000
    >>> [ 1046.984725] ESI: c6e0b2a8 EDI: c133234c EBP: d6645f20 ESP: d6645f18
    >>> [ 1046.984736]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
    >>> [ 1046.984748] Process head (pid: 15038, ti=d6645000 task=ca6c6900
    >>> task.ti=d6645000)
    >>> [ 1046.984757] Stack:
    >>> [ 1046.984764]  d6644000 c6e0341c d6645f28 c10a3423 d6645f34 c1204bf8
    >>> c1204bdc d6645f44
    >>> [ 1046.984800] <0> c1201ebc c93ea400 f70a12c0 d6645f70 c10e594f
    >>> c112b2df 00002000 bfa194ec
    >>> [ 1046.984840] <0> 00000000 c93ea414 c133234c e07cd600 bfa194ec
    >>> c10e58c1 d6645f8c c10a6223
    >>> [ 1046.984883] Call Trace:
    >>> [ 1046.984902]  [<c10a3423>] ? per_cpu_ptr_to_phys+0x5b/0x74
    >>> [ 1046.984920]  [<c1204bf8>] ? show_crash_notes+0x1c/0x30
    >
    > It's probably the same bug Cliff Wickman reported.
    > per_cpu_ptr_to_phys() was using wrong first chunk match logic which
    > ends up passing wrong addresses to vmalloc_to_page().  I have the
    > following fix patch queued in percpu#for-linus branch and was waiting
    > for Linus to come back.
    >
    >  http://git.kernel.org/?p=linux/kernel/git/tj/percpu.git;a=commitdiff_plain;h=9983b6f0cf8263e51bcf4c8a9dc0c1ef175b3c60;hp=a92d3ff9e5dbd958d8008a3e7a573e988e370ca3
    >
    > Can you please verify the above patch fixes the problem?

    Yes, that patch fixes the problem on my box, thanks.

    >
    > Thanks.
    >
    > --
    > tejun
    >
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