Thanks for the explanation, robot found an new error is from this commit,Hi, Can someone help me interpret this email? I was expecting this to be about a dmesg change which is expected, but the content doesn't seem to indicate that. For the record, the commit shouldn't really introduce any functional changes. It merely avoids calling kcalloc with count==-EINVAL. In both cases, an error should be returned from acpi_pcc_probe to pcc_init, which should in turn always return -ENODEV. So with the commit in place, this would be logged: [ 3.957345] ACPI: [PCCT:0x00] Invalid zero length [ 3.962340] Error parsing PCC subspaces from PCCT instead of: [ 3.957345] ACPI: [PCCT:0x00] Invalid zero length [ 3.962340] Could not allocate space for PCC mbox channels
On 09/29/2018 11:17 PM, kernel test robot wrote:FYI, we noticed the following commit (built with gcc-7): commit: afd0b1fb22269f48d68fdf269891c653818c8047 ("mailbox: PCC: handle parse error") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: ftq with following parameters: nr_task: 100% samples: 6000ss test: cache freq: 20 ucode: 0x200004d cpufreq_governor: performance test-description: The FTQ benchmarks measure hardware and software interference or 'noise' on a node from the applications perspective. test-url: https://github.com/rminnich/ftq on test machine: 104 threads Intel(R) Xeon(R) Platinum 8170 CPU @ 2.10GHz with 192G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): 2018-09-21 23:31:26 ./ftq_cache -f 20 -n 6000 -t 104 -a 360448 ticks per ns 2.09508This ^^^ appears to be the actual error, but I don't understand what the expected result should be or what this really means. Thanks, -DaveTo 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 Thanks, Rong Chen_______________________________________________ LKP mailing list LKP@lists.01.org https://lists.01.org/mailman/listinfo/lkp