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Message-ID: <20140930075624.GA9561@wfg-t540p.sh.intel.com>
Date: Tue, 30 Sep 2014 15:56:24 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Joonsoo Kim <iamjoonsoo.kim@....com>
Cc: Jet Chen <jet.chen@...el.com>, Su Tao <tao.su@...el.com>,
Yuanhan Liu <yuanhan.liu@...el.com>, LKP <lkp@...org>,
linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [mm/slab] BUG: unable to handle kernel paging request at 00010023
Hi Joonsoo,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 36fbfebe776eb5871d61e7a755c9feb1c96cc4aa
Author: Joonsoo Kim <iamjoonsoo.kim@....com>
AuthorDate: Tue Sep 23 11:52:35 2014 +1000
Commit: Stephen Rothwell <sfr@...b.auug.org.au>
CommitDate: Tue Sep 23 11:52:35 2014 +1000
mm/slab: support slab merge
Slab merge is good feature to reduce fragmentation. If new creating slab
have similar size and property with exsitent slab, this feature reuse it
rather than creating new one. As a result, objects are packed into fewer
slabs so that fragmentation is reduced.
Below is result of my testing.
* After boot, sleep 20; cat /proc/meminfo | grep Slab
<Before>
Slab: 25136 kB
<After>
Slab: 24364 kB
We can save 3% memory used by slab.
For supporting this feature in SLAB, we need to implement SLAB specific
kmem_cache_flag() and __kmem_cache_alias(), because SLUB implements some
SLUB specific processing related to debug flag and object size change on
these functions.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
Cc: Christoph Lameter <cl@...ux.com>
Cc: Pekka Enberg <penberg@...nel.org>
Cc: David Rientjes <rientjes@...gle.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
+----------------------------------------------+------------+------------+---------------+
| | 8c087489b8 | 36fbfebe77 | next-20140923 |
+----------------------------------------------+------------+------------+---------------+
| boot_successes | 60 | 0 | 1 |
| boot_failures | 0 | 20 | 314 |
| BUG:unable_to_handle_kernel | 0 | 20 | 312 |
| Oops | 0 | 20 | 312 |
| EIP_is_at_kernfs_link_sibling | 0 | 4 | 14 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 20 | 312 |
| backtrace:acpi_bus_scan | 0 | 4 | 14 |
| backtrace:acpi_scan_init | 0 | 20 | 45 |
| backtrace:acpi_init | 0 | 20 | 45 |
| backtrace:kernel_init_freeable | 0 | 20 | 312 |
| EIP_is_at_kernfs_add_one | 0 | 16 | 298 |
| backtrace:kobject_add_internal | 0 | 16 | 31 |
| backtrace:kobject_init_and_add | 0 | 16 | 31 |
| backtrace:acpi_scan_add_handler_with_hotplug | 0 | 16 | 31 |
| backtrace:acpi_pci_root_init | 0 | 16 | 31 |
| backtrace:tty_register_driver | 0 | 0 | 106 |
| backtrace:pty_init | 0 | 0 | 106 |
| backtrace:acpi_bus_register_driver | 0 | 0 | 1 |
| backtrace:acpi_button_driver_init | 0 | 0 | 1 |
| BUG:kernel_boot_crashed | 0 | 0 | 1 |
| BUG:kernel_test_crashed | 0 | 0 | 1 |
| backtrace:subsys_system_register | 0 | 0 | 160 |
| backtrace:container_dev_init | 0 | 0 | 160 |
| backtrace:driver_init | 0 | 0 | 160 |
+----------------------------------------------+------------+------------+---------------+
[ 0.463788] ACPI: (supports S0 S5)
[ 0.464003] ACPI: Using IOAPIC for interrupt routing
[ 0.464738] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.466034] BUG: unable to handle kernel paging request at 00010023
[ 0.466989] IP: [<c117dcf9>] kernfs_add_one+0x89/0x130
[ 0.467812] *pdpt = 0000000000000000 *pde = f000ff53f000ff53
[ 0.468000] Oops: 0002 [#1] SMP
[ 0.468000] Modules linked in:
[ 0.468000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.17.0-rc6-00089-g36fbfeb #1
[ 0.468000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 0.468000] task: d303ec90 ti: d3040000 task.ti: d3040000
[ 0.468000] EIP: 0060:[<c117dcf9>] EFLAGS: 00010286 CPU: 0
[ 0.468000] EIP is at kernfs_add_one+0x89/0x130
[ 0.468000] EAX: 542572cb EBX: 00010003 ECX: 00000008 EDX: 2c8de598
[ 0.468000] ESI: d311de10 EDI: d311de70 EBP: d3041dd8 ESP: d3041db4
[ 0.468000] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 0.468000] CR0: 8005003b CR2: 00010023 CR3: 01a8a000 CR4: 000006f0
[ 0.468000] Stack:
[ 0.468000] d3006f00 00000202 d311de70 d311de10 d3041dd8 c117dba0 d311de10 c159a5c0
[ 0.468000] c1862a00 d3041df0 c117f0f2 00000000 c18629f4 d311de70 00000000 d3041e2c
[ 0.468000] c117f8b5 00001000 00000000 c159a5c0 c18629f4 00000000 00000001 c1862a00
[ 0.468000] Call Trace:
[ 0.468000] [<c117dba0>] ? kernfs_new_node+0x30/0x40
[ 0.468000] [<c117f0f2>] __kernfs_create_file+0x92/0xc0
[ 0.468000] [<c117f8b5>] sysfs_add_file_mode_ns+0x95/0x190
[ 0.468000] [<c117f9d7>] sysfs_create_file_ns+0x27/0x40
[ 0.468000] [<c1252ef6>] kobject_add_internal+0x136/0x2c0
[ 0.468000] [<c125e360>] ? kvasprintf+0x40/0x50
[ 0.468000] [<c1252a92>] ? kobject_set_name_vargs+0x42/0x60
[ 0.468000] [<c12530b5>] kobject_init_and_add+0x35/0x50
[ 0.468000] [<c12ad04f>] acpi_sysfs_add_hotplug_profile+0x24/0x4a
[ 0.468000] [<c12a7280>] acpi_scan_add_handler_with_hotplug+0x21/0x28
[ 0.468000] [<c18df524>] acpi_pci_root_init+0x20/0x22
[ 0.468000] [<c18df0e1>] acpi_scan_init+0x24/0x16d
[ 0.468000] [<c18def73>] acpi_init+0x20c/0x224
[ 0.468000] [<c18ded67>] ? acpi_sleep_init+0xab/0xab
[ 0.468000] [<c100041e>] do_one_initcall+0x7e/0x1b0
[ 0.468000] [<c18ded67>] ? acpi_sleep_init+0xab/0xab
[ 0.468000] [<c18b24ba>] ? repair_env_string+0x12/0x54
[ 0.468000] [<c18b24a8>] ? initcall_blacklist+0x7c/0x7c
[ 0.468000] [<c105e100>] ? parse_args+0x160/0x3f0
[ 0.468000] [<c18b2bd1>] kernel_init_freeable+0xfc/0x179
[ 0.468000] [<c156782b>] kernel_init+0xb/0xd0
[ 0.468000] [<c1574601>] ret_from_kernel_thread+0x21/0x30
[ 0.468000] [<c1567820>] ? rest_init+0xb0/0xb0
[ 0.468000] Code: 26 00 83 e1 10 75 5b 8b 46 24 e8 b3 ea ff ff 89 46 38 89 f0 e8 d9 f9 ff ff 85 c0 89 c3 75 ca 8b 5f 5c 85 db 74 11 e8 97 90 f1 ff <89> 43 20 89 53 24 89 43 28 89 53 2c b8 c0 2f 85 c1 e8 d1 36 3f
[ 0.468000] EIP: [<c117dcf9>] kernfs_add_one+0x89/0x130 SS:ESP 0068:d3041db4
[ 0.468000] CR2: 0000000000010023
[ 0.468000] ---[ end trace 4fa173691404b63f ]---
[ 0.468000] Kernel panic - not syncing: Fatal exception
git bisect start 55f21306900abf9f9d2a087a127ff49c6d388ad2 0f33be009b89d2268e94194dc4fd01a7851b6d51 --
git bisect good 18c13e2d9b75e2760e6520f2fde00401192956f3 # 17:56 20+ 0 Merge remote-tracking branch 'bluetooth/master'
git bisect good abf79495f38ba66f750566b3f0a8da8dd94b4dc3 # 18:03 20+ 0 Merge remote-tracking branch 'ftrace/for-next'
git bisect good 0bed22034e26a3c37ee4407fccffa8c095d5e144 # 18:09 20+ 0 Merge remote-tracking branch 'pinctrl/for-next'
git bisect good 15c9281a15ed7718868d115d4d00619b0b7a2624 # 18:14 20+ 0 Merge remote-tracking branch 'clk/clk-next'
git bisect good 50939531dea1b913b7fa29f9bbc69feafefd090c # 18:23 20+ 0 Merge branch 'rd-docs/master'
git bisect good aa881e3c5e87c8aa23519f40554897d56f32b935 # 18:49 20+ 0 Merge remote-tracking branch 'powerpc-mpe/next'
git bisect bad 81b63d14db32bd7706c955d1e04e65b152b2277a # 18:57 0- 2 Merge branch 'akpm-current/current'
git bisect bad f313ca82d72066a3c44fd6c66cee57b25de43aa9 # 19:31 0- 1 introduce-dump_vma-fix
git bisect good 2c5fe9213048c5640b8e46407f5614038c03ad93 # 20:16 20+ 0 mm: fix kmemcheck.c build errors
git bisect bad 69454f8be7f621ac8c3c6c9763bb70e116988942 # 20:35 0- 18 block_dev: implement readpages() to optimize sequential read
git bisect bad 66a31d528a1e3d483be2b1c993ec1268412f0074 # 20:40 0- 1 memory-hotplug-add-sysfs-zones_online_to-attribute-fix-2
git bisect good 5e8acb68610c077b08cb3f16305aa3cc22e5d2a8 # 21:07 20+ 0 kernel/kthread.c: partial revert of 81c98869faa5 ("kthread: ensure locality of task_struct allocations")
git bisect bad 36fbfebe776eb5871d61e7a755c9feb1c96cc4aa # 22:06 0- 10 mm/slab: support slab merge
git bisect good 11e57381eced875ef5a6fea4005fdf72b6f68eff # 22:19 20+ 0 mm/slab_common: commonize slab merge logic
git bisect good 8c087489b8a32b9235f7f9417390c62d93aba522 # 22:24 20+ 0 mm/slab_common: fix build failure if CONFIG_SLUB
# first bad commit: [36fbfebe776eb5871d61e7a755c9feb1c96cc4aa] mm/slab: support slab merge
git bisect good 8c087489b8a32b9235f7f9417390c62d93aba522 # 22:26 60+ 0 mm/slab_common: fix build failure if CONFIG_SLUB
git bisect bad 55f21306900abf9f9d2a087a127ff49c6d388ad2 # 22:26 0- 314 Add linux-next specific files for 20140923
git bisect good f4cb707e7ad9727a046b463232f2de166e327d3e # 22:32 60+ 0 Merge tag 'pm+acpi-3.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect bad 4d8426f9ac601db2a64fa7be64051d02b9c9fe01 # 22:36 0- 60 Add linux-next specific files for 20140926
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-m 320
-smp 1
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-yocto-vp-27:20140926220610:i386-randconfig-ib1-09232303:3.17.0-rc6-00089-g36fbfeb:1" of type "text/plain" (38311 bytes)
Download attachment "i386-randconfig-ib1-09232303-55f21306900abf9f9d2a087a127ff49c6d388ad2-BUG:-unable-to-handle-kernel-108269.log" of type "application/octet-stream" (108330 bytes)
View attachment "config-3.17.0-rc6-00089-g36fbfeb" of type "text/plain" (104339 bytes)
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