Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 87b1c39af431a20ab69bdceb9036360cf58a28e4 ("[RFC PATCH 23/37] mm: rcu safe vma->vm_file freeing") url: https://github.com/0day-ci/linux/commits/Michel-Lespinasse/Speculative-page-faults/20210407-095517 base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git a500fc918f7b8dc3dff2e6c74f3e73e856c18248 in testcase: nvml version: nvml-x86_64-09f75f696-1_20210402 with following parameters: test: pmem group: blk nr_pmem: 1 fs: ext4 mount_option: dax bp_memmap: 32G!4G ucode: 0x7000019 on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 48G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot 2021-04-07 16:01:30 ./RUNTESTS -f pmem blk_rw_mt blk_rw_mt/TEST0: SETUP (check/pmem/debug) [MATCHING FAILED, COMPLETE FILE (out0.log) BELOW] blk_rw_mt/TEST0: START: blk_rw_mt ./blk_rw_mt 4096 /fs/pmem0//test_blk_rw_mt0😘⠏⠍⠙⠅ɗPMDKӜ⥺🙋/testfile1 123 5 80 4096 block size 4096 usable blocks 100 /fs/pmem0//test_blk_rw_mt0😘⠏⠍⠙⠅ɗPMDKӜ⥺🙋/testfile1: pmemblk_check: Resource temporarily unavailable blk_rw_mt/TEST0: DONE [EOF] out0.log.match:1 blk_rw_mt$(nW)TEST0: START: blk_rw_mt out0.log:1 blk_rw_mt/TEST0: START: blk_rw_mt out0.log.match:2 $(nW)blk_rw_mt$(nW) 4096 $(nW)testfile1 123 5 80 out0.log:2 ./blk_rw_mt 4096 /fs/pmem0//test_blk_rw_mt0😘⠏⠍⠙⠅ɗPMDKӜ⥺🙋/testfile1 123 5 80 out0.log.match:3 4096 block size 4096 usable blocks 100 out0.log:3 4096 block size 4096 usable blocks 100 out0.log.match:4 blk_rw_mt$(nW)TEST0: DONE out0.log:4 /fs/pmem0//test_blk_rw_mt0😘⠏⠍⠙⠅ɗPMDKӜ⥺🙋/testfile1: pmemblk_check: Resource temporarily unavailable FAIL: match: out0.log.match:4 did not match pattern RUNTESTS: stopping: blk_rw_mt/TEST0 failed, TEST=check FS=pmem BUILD=debug 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 split-job --compatible job.yaml bin/lkp run compatible-job.yaml --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang