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Date: Mon, 9 Oct 2017 10:46:49 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: David Howells <dhowells@...hat.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
David Howells <dhowells@...hat.com>, lkp@...org
Subject: [lkp-robot] [hugetlbfs] a6526e072b:
BUG_hugetlbfs_inode_cache(Not_tainted):Objects_remaining_in_hugetlbfs_inode_cache_on__kmem_cache_shutdown()
FYI, we noticed the following commit (built with gcc-6):
commit: a6526e072b5fe1b8e8cfcb634a34cba0b249d120 ("hugetlbfs: Convert to fs_context")
https://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git mount-context
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -m 420M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------------------------------------------------------+------------+------------+
| | 54b4026cec | a6526e072b |
+-------------------------------------------------------------------------------------------------------------+------------+------------+
| boot_successes | 0 | 4 |
| boot_failures | 41 | 55 |
| BUG:stack_guard_page_was_hit_at#(stack_is#..#) | 41 | |
| Kernel_panic-not_syncing:Fatal_exception | 41 | |
| BUG:kernel_hang_in_test_stage | 1 | |
| BUG:kernel_hang_in_early-boot_stage,last_printk | 2 | |
| BUG:kernel_in_stage | 3 | |
| BUG_hugetlbfs_inode_cache(Not_tainted):Objects_remaining_in_hugetlbfs_inode_cache_on__kmem_cache_shutdown() | 0 | 55 |
| INFO:Slab#objects=#used=#fp=#flags= | 0 | 55 |
| INFO:Object#@...set= | 0 | 55 |
+-------------------------------------------------------------------------------------------------------------+------------+------------+
[ 0.130495] hpet0: 3 comparators, 64-bit 100.000000 MHz counter
[ 0.135031] clocksource: Switched to clocksource kvm-clock
[ 0.145593] VFS: Disk quotas dquot_6.6.0
[ 0.146036] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.146700] =============================================================================
[ 0.147019] BUG hugetlbfs_inode_cache (Not tainted): Objects remaining in hugetlbfs_inode_cache on __kmem_cache_shutdown()
[ 0.147019] -----------------------------------------------------------------------------
[ 0.147019]
[ 0.147019] Disabling lock debugging due to kernel taint
[ 0.147019] INFO: Slab 0xffffea00002a2a00 objects=13 used=1 fp=0xffff88000a8a9d40 flags=0xfffffc0008100
[ 0.147019] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B 4.14.0-rc3-00217-ga6526e0 #1
[ 0.147019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 0.147019] Call Trace:
[ 0.147019] dump_stack+0x63/0x86
[ 0.147019] slab_err+0x9e/0xb0
[ 0.147019] ? free_cpumask_var+0x9/0x10
[ 0.147019] ? on_each_cpu_cond+0xb7/0x150
[ 0.147019] ? __kmalloc+0x1d5/0x210
[ 0.147019] __kmem_cache_shutdown+0x1b7/0x3d0
[ 0.147019] ? pcpu_alloc+0x2bf/0x610
[ 0.147019] shutdown_cache+0x20/0x1c0
[ 0.147019] kmem_cache_destroy+0x1ce/0x200
[ 0.147019] init_hugetlbfs_fs+0x92/0x163
[ 0.147019] ? init_ramfs_fs+0x25/0x25
[ 0.147019] ? set_debug_rodata+0x17/0x17
[ 0.147019] do_one_initcall+0x43/0x170
[ 0.147019] ? set_debug_rodata+0x17/0x17
[ 0.147019] kernel_init_freeable+0x198/0x220
[ 0.147019] ? rest_init+0xd0/0xd0
[ 0.147019] kernel_init+0xe/0x101
[ 0.147019] ret_from_fork+0x25/0x30
[ 0.147019] INFO: Object 0xffff88000a8a8000 @offset=0
[ 0.171667] kmem_cache_destroy hugetlbfs_inode_cache: Slab cache still has objects
[ 0.172452] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B 4.14.0-rc3-00217-ga6526e0 #1
[ 0.173293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 0.173449] Call Trace:
[ 0.173449] dump_stack+0x63/0x86
[ 0.173449] kmem_cache_destroy+0x1ec/0x200
[ 0.173449] init_hugetlbfs_fs+0x92/0x163
[ 0.173449] ? init_ramfs_fs+0x25/0x25
[ 0.173449] ? set_debug_rodata+0x17/0x17
[ 0.173449] do_one_initcall+0x43/0x170
[ 0.173449] ? set_debug_rodata+0x17/0x17
[ 0.173449] kernel_init_freeable+0x198/0x220
[ 0.173449] ? rest_init+0xd0/0xd0
[ 0.173449] kernel_init+0xe/0x101
[ 0.173449] ret_from_fork+0x25/0x30
[ 0.178787] pnp: PnP ACPI init
[ 0.179179] pnp 00:00: Plug and Play ACPI device, IDs PNP0b00 (active)
[ 0.179834] pnp 00:01: Plug and Play ACPI device, IDs PNP0303 (active)
[ 0.180479] pnp 00:02: Plug and Play ACPI device, IDs PNP0f13 (active)
[ 0.181114] pnp 00:03: [dma 2]
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
View attachment "config-4.14.0-rc3-00217-ga6526e0" of type "text/plain" (163211 bytes)
View attachment "job-script" of type "text/plain" (3996 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (10840 bytes)
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