linux-ext4 - Re: [LKP] [ext4] e2ae766c1b: BUG:sleeping_function_called_from_invalid_context_at

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Message-ID: <87mvg08voo.fsf@yhuang-dev.intel.com>
Date:   Tue, 13 Dec 2016 09:27:51 +0800
From:   "Huang\, Ying" <ying.huang@...el.com>
To:     Jan Kara <jack@...e.cz>
Cc:     kernel test robot <xiaolong.ye@...el.com>,
        Theodore Ts'o <tytso@....edu>, <linux-nvdimm@...ts.01.org>,
        Dave Chinner <david@...morbit.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        <linux-ext4@...r.kernel.org>, <lkp@...org>
Subject: Re: [LKP] [ext4] e2ae766c1b: BUG:sleeping_function_called_from_invalid_context_at_kernel/locking/rwsem.c

Jan Kara <jack@...e.cz> writes:

> On Mon 12-12-16 18:13:21, kernel test robot wrote:
>> FYI, we noticed the following commit:
>> 
>> commit: e2ae766c1b030271b5099b25674e2131d1d1e8c1 ("ext4: convert DAX faults to iomap infrastructure")
>> https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
>> 
>> in testcase: nvml
>> with following parameters:
>> 
>> 	group: vmem
>> 	test: pmem
>> 	nr_pmem: 1
>> 	fs: ext4
>> 	mount_option: dax
>> 
>> 
>> 
>> on test machine: 64 threads Intel(R) Xeon(R) CPU E5-4650 0 @ 2.70GHz with 64G memory
>> 
>> caused below changes:
>> 
>> 
>> +------------------------------------------------+------------+------------+
>> |                                                | 96f8ba3dd6 | e2ae766c1b |
>> +------------------------------------------------+------------+------------+
>> | boot_successes                                 | 2          | 2          |
>> | boot_failures                                  | 2          | 2          |
>> | BUG:kernel_hang_in_test_stage                  | 2          |            |
>> | WARNING:at_fs/sysfs/dir.c:#sysfs_warn_dup      | 0          | 2          |
>> | calltrace:parport_pc_init                      | 0          | 2          |
>> | calltrace:SyS_finit_module                     | 0          | 2          |
>> | WARNING:at_lib/kobject.c:#kobject_add_internal | 0          | 2          |
>> +------------------------------------------------+------------+------------+
>> 
>> 
>> 
>> user  :notice: [  325.592182] vmem_aligned_alloc/TEST1: SETUP (check/pmem/debug)
>> 
>> user  :notice: [  325.603973] vmem_aligned_alloc/TEST1: START: vmem_aligned_alloc
>> kern  :err   : [  325.608906] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:51
>> kern  :err   : [  325.608908] in_atomic(): 1, irqs_disabled(): 0, pid: 24813, name: vmem_aligned_al
>> kern  :warn  : [  325.608914] CPU: 44 PID: 24813 Comm: vmem_aligned_al Tainted: G           O    4.9.0-rc4-00045-ge2ae766 #1
>> kern  :warn  : [  325.608916] Hardware name: Intel Corporation LH Pass/S4600LH...., BIOS SE5C600.86B.99.02.1047.032320122259 03/23/2012
>> kern  :warn  : [  325.608922]  ffffc9002c1f7be0
>> kern  :warn  : [  325.608923]  ffffffff81466af9
>> kern  :warn  : [  325.608924]  ffff880fea2425c0
>
> I think this is actually a bug introduced by Ross' PMD support. Attached
> patch should fix it. Ross, can you check it please?

Hi, Jan

Could you provide a git tree commit for me to test it?  If you want it
to be tested by 0day.

Best Regards,
Huang, Ying

> 								Honza
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