FYI, we noticed the following commit:

commit: 174cc7187e6f088942c8e74daa7baff7b44b33c9 ("ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

in testcase: phoronix-test-suite
with following parameters:

	need_x: true
	test: jxrendermark-1.2.0
	cpufreq_governor: performance

test-description: The Phoronix Test Suite is the most comprehensive testing and benchmarking platform available that provides an extensible framework for which new tests can be easily added.
test-url: http://www.phoronix-test-suite.com/


on test machine: 16 threads Nehalem-EP with 16G memory

caused below changes:


[    2.043693] ACPI Error: Mutex [ACPI_MTX_Tables] already acquired by this thread [497483776] (20160930/utmutex-254)
[    2.054084] ACPI Error: Mutex [0x2] is not acquired, cannot release (20160930/utmutex-326)

To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Xiaolong