[LKP] [XARRAY] 8b3cc3a10f [ 0.001000] WARNING: CPU: 0 PID: 0 at mm/slab_common.c:103 kmem_cache_create

Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is git://git.infradead.org/users/willy/linux-dax.git xarray-2017-03-11 commit 8b3cc3a10f9990910a13f02f7efe038092ab19da Author: Matthew Wilcox <mawilcox(a)microsoft.com&gt; AuthorDate: Thu Mar 2 08:03:30 2017 -0500 Commit: Matthew Wilcox <mawilcox(a)microsoft.com&gt; CommitDate: Wed Mar 15 08:51:12 2017 -0400 XArray: Convert IDR and add test suite The test suite for the xarray is still quite modest, but converting the IDR and the IDA to use the xarray lets me use the IDR & IDA test suites to test the xarray. They have been very helpful in finding bugs (and poor design decisions). Signed-off-by: Matthew Wilcox <mawilcox(a)microsoft.com&gt; 972eeee81d Add XArray 8b3cc3a10f XArray: Convert IDR and add test suite e871afbde4 nios2: Add definitions for flush_dcache_mmap_lock +------------------------------------------------+------------+------------+------------+ | | 972eeee81d | 8b3cc3a10f | e871afbde4 | +------------------------------------------------+------------+------------+------------+ | boot_successes | 0 | 0 | 0 | | boot_failures | 48 | 15 | 17 | | is_trying_to_contend_lock(ww_class_mutex)at | 48 | | | | calltrace:__ww_mutex_lock | 48 | | | | WARNING:at_mm/slab_common.c:#kmem_cache_create | 0 | 15 | 17 | | INFO:trying_to_register_non-static_key | 0 | 15 | 17 | +------------------------------------------------+------------+------------+------------+ [ 0.000000] .data : 0x81394418 - 0x815a59e0 (2117 kB) [ 0.000000] .text : 0x81000000 - 0x81394418 (3665 kB) [ 0.000000] Checking if this processor honours the WP bit even in supervisor mode...Ok. [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.001000] ------------[ cut here ]------------ [ 0.001000] WARNING: CPU: 0 PID: 0 at mm/slab_common.c:103 kmem_cache_create+0xa9/0x205 [ 0.001000] Modules linked in: [ 0.001000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.11.0-rc1-00046-g8b3cc3a #1 [ 0.001000] Call Trace: [ 0.001000] dump_stack+0x75/0xa9 [ 0.001000] ? kmem_cache_create+0xa9/0x205 [ 0.001000] __warn+0xb2/0xc9 [ 0.001000] warn_slowpath_null+0x11/0x16 [ 0.001000] kmem_cache_create+0xa9/0x205 [ 0.001000] ? alloc_cpumask_var+0xb/0xd [ 0.001000] xarray_init+0x1e/0x27 [ 0.001000] ? __xa_clear_tag+0x84/0x84 [ 0.001000] start_kernel+0x23b/0x3a9 [ 0.001000] i386_start_kernel+0x91/0x95 [ 0.001000] startup_32_smp+0x166/0x168 [ 0.001000] ---[ end trace f68728a0d3053b52 ]--- [ 0.001000] Running RCU self tests # HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD git bisect start 1be31ac7e32462d1e1b8a310ae90be4b155be3a0 4495c08e84729385774601b5146d51d9e5849f81 -- git bisect bad 47c117f75e856e266c466c04d6a140985e212b68 # 01:11 B 0 1 12 0 Merge 'gfs2/for-linus' into devel-catchup-201703152341 git bisect good b1c51a0794dcfca8378aefc0538956937800ddd6 # 01:55 G 10 0 2 2 Merge 'jwboyer-fedora/rawhide' into devel-catchup-201703152341 git bisect good 3bee6781bee75afeec3f73e6ab8a95bb68b8359f # 02:37 G 10 0 0 0 Merge 'kdave-btrfs-devel/misc-next' into devel-catchup-201703152341 git bisect bad 74ef1f69edc3a0a4a535490c56bfa866fc735894 # 02:54 B 0 1 12 0 Merge 'dax/xarray-2017-03-11' into devel-catchup-201703152341 git bisect bad 8b3cc3a10f9990910a13f02f7efe038092ab19da # 03:15 B 0 1 12 0 XArray: Convert IDR and add test suite git bisect good a55c428120d0f1d87d2e8e25dc90d243bac4c44e # 04:13 G 10 0 10 12 radix tree: Add a missing cast to gfp_t git bisect good 972eeee81d52768605a7fdddbc0cbf7a655570f0 # 05:03 G 10 0 10 12 Add XArray # first bad commit: [8b3cc3a10f9990910a13f02f7efe038092ab19da] XArray: Convert IDR and add test suite git bisect good 972eeee81d52768605a7fdddbc0cbf7a655570f0 # 07:04 G 30 0 30 44 Add XArray # extra tests with CONFIG_DEBUG_INFO_REDUCED git bisect bad 8b3cc3a10f9990910a13f02f7efe038092ab19da # 07:26 B 0 1 12 0 XArray: Convert IDR and add test suite # extra tests on HEAD of linux-devel/devel-catchup-201703152341 git bisect bad 1be31ac7e32462d1e1b8a310ae90be4b155be3a0 # 07:32 B 0 23 37 0 0day head guard for 'devel-catchup-201703152341' # extra tests on tree/branch dax/xarray-2017-03-11 git bisect bad e871afbde442a9e02fa2634861c6241f07e4a321 # 07:53 B 0 1 14 2 nios2: Add definitions for flush_dcache_mmap_lock # extra tests with first bad commit reverted git bisect good 8108171491222406c46d74807bece6227d37eac3 # 09:03 G 10 0 10 10 Revert "XArray: Convert IDR and add test suite" --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/lkp Intel Corporation