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    SubjectRe: Frequent oops in shrink_mmap
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    David desJardins <desj@google.com> writes:
    > Or is it the
    > case that only memory errors in the top two bits will trigger this oops,
    > and other memory errors might remain undetected, and that the great
    > majority of entries will be zero so that all of the errors are likely to
    > occur on those pages?

    Regarding whether only the top two bits are affected, I seem to be repeatedly
    getting this same oops, but with the error always at 00000040 instead:

    Nov 28 22:32:43 microdog kernel: Oops: 0000
    Nov 28 22:32:43 microdog kernel: CPU: 0
    Nov 28 22:32:43 microdog kernel: EIP: 0010:[try_to_free_buffers+18/136]
    Nov 28 22:32:43 microdog kernel: EFLAGS: 00010206
    Nov 28 22:32:43 microdog kernel: eax: 00000040 ebx: c02420c0 ecx: 00037900
    edx: 00018000
    Nov 28 22:32:43 microdog kernel: esi: 00000040 edi: 00000040 ebp: c02420c0
    esp: c0095fa8
    Nov 28 22:32:43 microdog kernel: ds: 0018 es: 0018 ss: 0018
    Nov 28 22:32:43 microdog kernel: Process kswapd (pid: 4, process nr: 4, stackpag
    e=c0095000)
    Nov 28 22:32:43 microdog kernel: Stack: 00000030 c0094000 c0119daa c02420c0 0000
    0016 00000006 c011eaeb 00000006
    Nov 28 22:32:43 microdog kernel: 00000030 00000000 c01c0cda c00941c1 c011
    eb97 00000030 00000f00 c009dfb4
    Nov 28 22:32:43 microdog kernel: c0106000 00001000 c0106513 00000000 0000
    0f00 c01f3fd4
    Nov 28 22:32:43 microdog kernel: Call Trace: [shrink_mmap+218/300] [do_try_to_fr
    ee_pages+35/120] [tvecs+4894/25410] [kswapd+87/200] [get_options+0/116] [kernel_
    thread+35/48]
    Nov 28 22:32:43 microdog kernel: Code: 8b 76 14 83 78 20 00 75 06 f6 40 18 46 74
    13 6a 00 e8 4c 01


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