FYI, we noticed the below changes on git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master commit 0d55ba46bfbee64fd2b492b87bfe2ec172e7b056 ("x86/cacheinfo: Move cacheinfo sysfs code to generic infrastructure") +------------------------------------------------------+----------+-------------------+ | | v4.0-rc2 | tip_x86_cacheinfo | +------------------------------------------------------+----------+-------------------+ | boot_successes | 851 | 10 | | boot_failures | 19 | 9 | | BUG:kernel_test_crashed | 10 | | | BUG:kernel_boot_oversize | 4 | | | BUG:kernel_test_oversize | 2 | | | BUG:kernel_test_hang | 3 | | | WARNING:at_fs/sysfs/group.c:#internal_create_group() | 0 | 9 | | backtrace:cache_add_dev | 0 | 9 | | backtrace:cacheinfo_sysfs_init | 0 | 9 | | backtrace:kernel_init_freeable | 0 | 9 | +------------------------------------------------------+----------+-------------------+ [ 8.700596] Non-volatile memory driver v1.3 [ 8.705684] Linux agpgart interface v0.103 [ 8.711362] ------------[ cut here ]------------ [ 8.716832] WARNING: CPU: 31 PID: 1 at fs/sysfs/group.c:102 internal_create_group+0x151/0x280() [ 8.729104] sysfs: (bin_)attrs not set by subsystem for group: index3/ [ 8.736714] Modules linked in: [ 8.740520] CPU: 31 PID: 1 Comm: swapper/0 Not tainted 4.0.0-rc4-next-20150317 #1 [ 8.754247] Hardware name: Intel Corporation S2600CP/S2600CP, BIOS SE5C600.86B.99.99.x036.091920111209 09/19/2011 [ 8.766240] ffffffff81baac48 ffff88042d64fb78 ffffffff818b2806 0000000000003fae [ 8.775396] ffff88042d64fbc8 ffff88042d64fbb8 ffffffff8107293a ffff88042d64fba8 [ 8.784545] 0000000000000001 ffffffff81ddc9e0 0000000000000000 ffffffff81cca9c0 [ 8.793684] Call Trace: [ 8.796724] [] dump_stack+0x4c/0x65 [ 8.802777] [] warn_slowpath_common+0x8a/0xc0 [ 8.809789] [] warn_slowpath_fmt+0x46/0x50 [ 8.816515] [] ? ida_get_new_above+0x1dd/0x210 [ 8.823624] [] internal_create_group+0x151/0x280 [ 8.830929] [] sysfs_create_groups+0x49/0xa0 [ 8.837855] [] device_add+0x3fa/0x670 [ 8.844094] [] cpu_device_create+0xc0/0xe0 [ 8.850823] [] ? __kmalloc+0x27e/0x2b0 [ 8.857153] [] ? ida_get_new_above+0x1dd/0x210 [ 8.864271] [] cache_add_dev+0x182/0x230 [ 8.870807] [] cacheinfo_sysfs_init+0x53/0x95 [ 8.877821] [] ? container_dev_init+0x2f/0x2f [ 8.884848] [] do_one_initcall+0xc0/0x1f0 [ 8.891489] [] kernel_init_freeable+0x1bb/0x248 [ 8.898705] [] ? rest_init+0x90/0x90 [ 8.904841] [] kernel_init+0xe/0xf0 [ 8.910899] [] ret_from_fork+0x53/0x80 [ 8.917229] [] ? rest_init+0x90/0x90 [ 8.923374] ---[ end trace 316d11c18159d99b ]--- [ 8.928923] error populating cacheinfo..cpu0 Thanks, Ying Huang