[LKP] Re: [driver core] e2ae9bcc4a: unixbench.score -2.2% regression

Greeting, FYI, we noticed a -2.2% regression of unixbench.score due to commit: commit: e2ae9bcc4aaacda04edb75c4eea93384719efaa5 ("driver core: Add support for linking devices during device addition") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: unixbench on test machine: 96 threads Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 192G memory with following parameters: runtime: 300s nr_task: 1 test: syscall cpufreq_governor: performance ucode: 0x5002f01 test-description: UnixBench is the original BYTE UNIX benchmark suite aims to test performance of Unix-like system. test-url: https://github.com/kdlucas/byte-unixbench In addition to that, the commit also has significant impact on the following tests: If you fix the issue, kindly add following tag Reported-by: kernel test robot <rong.a.chen(a)intel.com&gt; Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml ========================================================================================= compiler/cpufreq_governor/kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase/ucode: gcc-9/performance/x86_64-rhel-8.3/1/debian-10.4-x86_64-20200603.cgz/300s/lkp-csl-2sp8/syscall/unixbench/0x5002f01 commit: 372a67c0c5 ("driver core: Add fwnode_to_dev() to look up device from fwnode") e2ae9bcc4a ("driver core: Add support for linking devices during device addition")