Hi all,
I'm a new comer and I'm trying to decipher a kernel dump. I'm not sure if this is the right place to ask such primitive questions.
RELEASE: 3.10.0-327.el7.x86_64 CentOS 7.2
#0 [ffff8833575cbba8] machine_kexec at ffffffff81051beb
#1 [ffff8833575cbc08] crash_kexec at ffffffff810f2542
#2 [ffff8833575cbcd8] oops_end at ffffffff8163e1a8
#3 [ffff8833575cbd00] die at ffffffff8101859b
#4 [ffff8833575cbd30] do_general_protection at ffffffff8163da9e
#5 [ffff8833575cbd60] general_protection at ffffffff8163d3a8
[exception RIP: __migration_entry_wait+148]
RIP: ffffffff811c5f64 RSP: ffff8833575cbe18 RFLAGS: 00010203
RAX: 01ffffffffffffff RBX: ffffea0000000030 RCX: 0000000000000000
RDX: 1e001897de001880 RSI: ffffea0000000030 RDI: f000c4bef000c4be
RBP: ffff8833575cbe28 R8: 00003ffffffff000 R9: 00000000000000a9
R10: 0000000000000000 R11: f000c4bef000c4be R12: 1e000297de001880
R13: ffff881d31804af8 R14: ffff881fcf29a580 R15: 0000000000000080
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000
#6 [ffff8833575cbe10] __migration_entry_wait at ffffffff811c5eea
#7 [ffff8833575cbe30] migration_entry_wait at ffffffff811c62b3
#8 [ffff8833575cbe40] handle_mm_fault at ffffffff81197a12
#9 [ffff8833575cbed0] __do_page_fault at ffffffff81640e22
#10 [ffff8833575cbf28] do_page_fault at ffffffff81641113
#11 [ffff8833575cbf50] page_fault at ffffffff8163d408
I'm wondering if the fault was at "__migration_entry_wait+26 at ffffffff811c5eea" or at the saved RIP: ffffffff811c5f64 which is at __migration_entry_wait+148 ". Should the fault be synchronous?
The call chain should be handle_mm_fault-->__handle_mm_fault-->handle_pte_fault-->do_swap_page-->migration_entry_wait as I figured it out. "__handle_mm_fault-->handle_pte_fault-->do_swap_page" vanishes from the backtrace! Are they all inlined by GCC?!
Thanks a lot.
Dashi Cao
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