3:23 p.m.
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit a9730fca9946f3697410479e0ef1bd759ba00a77 ("Fix kmalloc slab creation
sequence")
+--------------------------------------------------+------------+------------+
| 88793e5c77 |
a9730fca99 |
+--------------------------------------------------+------------+------------+
boot_successes | 0 | 543
|
boot_failures | 594 | 37 |
kernel_BUG_at_mm/slab.c | 594 | |
invalid_opcode | 594 | |
RIP:__kmem_cache_create | 594 | |
Kernel_panic-not_syncing:Fatal_exception | 594 | |
backtrace:create_kmalloc_caches | 594 | |
backtrace:kmem_cache_init | 594 | |
Out_of_memory:Kill_process | 0 | 5 |
WARNING:at_drivers/block/floppy.c:#schedule_bh() | 0 | 1 |
backtrace:do_mount | 0 | 1 |
backtrace:compat_SyS_mount | 0 | 1 |
WARNING:at_kernel/trace/ftrace.c:#ftrace_bug() | 0 | 31 |
backtrace:perf_ftrace_event_register | 0 | 31 |
backtrace:perf_trace_init | 0 | 31 |
backtrace:perf_tp_event_init | 0 | 31 |
backtrace:perf_try_init_event | 0 | 31 |
backtrace:perf_init_event | 0 | 31 |
backtrace:SYSC_perf_event_open | 0 | 31 |
backtrace:SyS_perf_event_open | 0 | 31 |
+--------------------------------------------------+------------+------------+
The commit fixed a boot failure as below in old_dmesg.xz:
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] kernel BUG at mm/slab.c:2276!
[ 0.000000] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.1.0-11343-g88793e5 #113
[ 0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.7.5-20140531_083030-gandalf 04/01/2014
[ 0.000000] task: ffffffff8401b580 ti: ffffffff84000000 task.ti: ffffffff84000000
[ 0.000000] RIP: 0010:[<ffffffff811ed056>] [<ffffffff811ed056>]
__kmem_cache_create+0x324/0x375
[ 0.000000] RSP: 0000:ffffffff84003e38 EFLAGS: 00010087
[ 0.000000] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 0.000000] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
[ 0.000000] RBP: ffffffff84003e98 R08: 0000000000001000 R09: 0000000000000001
[ 0.000000] R10: 0000000000000040 R11: ffffffffffffffc0 R12: ffff880033006f80
[ 0.000000] R13: 0000000000000000 R14: 0000000080000000 R15: 0000000000000040
[ 0.000000] FS: 0000000000000000(0000) GS:ffff880033600000(0000)
knlGS:0000000000000000
[ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 0.000000] CR2: ffff8800339ff000 CR3: 0000000004014000 CR4: 00000000000006b0
[ 0.000000] Stack:
[ 0.000000] ffffffff84003e48 0000000000000000 0000000080000000 0000000000001001
[ 0.000000] 0000000100000046 0000000000000001 0000000000008000 ffff880033006f80
[ 0.000000] 0000000000000060 ffffffff83a9c2fa 0000000000002000 0000ffffffff8464
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff8467a1b2>] create_boot_cache+0x3c/0x66
[ 0.000000] [<ffffffff8467a22b>] create_kmalloc_cache+0x4f/0x79
[ 0.000000] [<ffffffff8467a2b4>] create_kmalloc_caches+0x44/0xe5
[ 0.000000] [<ffffffff8467cb71>] kmem_cache_init+0x155/0x159
[ 0.000000] [<ffffffff81121e1d>] ? console_unlock+0x3fe/0x42d
[ 0.000000] [<ffffffff84648d08>] start_kernel+0x213/0x473
[ 0.000000] [<ffffffff84648120>] ? early_idt_handler_array+0x120/0x120
[ 0.000000] [<ffffffff846484c6>] x86_64_start_reservations+0x2a/0x2c
[ 0.000000] [<ffffffff846485f5>] x86_64_start_kernel+0x12d/0x13c
[ 0.000000] Code: 44 24 2c e8 24 b2 57 00 4d 85 f6 49 89 44 24 18 48 8b 4d c8 74 17 31
f6 48 89 cf e8 d5 53 fd ff 48 83 f8 10 49 89 44 24 40 77 02 <0f> 0b 44 89 ee 4c 89
e7 e8 84 d4 c4 01 89 c3 31 c0 85 db 74 2d
[ 0.000000] RIP [<ffffffff811ed056>] __kmem_cache_create+0x324/0x375
[ 0.000000] RSP <ffffffff84003e38>
[ 0.000000] ---[ end trace 5f21f6be99044392 ]---
[ 0.000000] Kernel panic - not syncing: Fatal exception
Thanks,
Ying Huang
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