Created attachment 275925 [details] Detailts on system information I am using perf-tool to record memory access to some kernel addresses. For some kernel addresses it freezes/lockup the system. I am using kernel version 4.15.0 on x86_64 arch. I am running on an Intel Broadwell machine. I am using Intel's PEBS to sample kernel memory access while running a micro-benchmark (performs repeated file operation) using following command. $ sudo perf mem -t store record This records memory references. After that I run a script to set HW breakpoint at the reference addresses. $ sudo timeout 1s perf record -e mem:<0xaddress>:rw It causes system hang at some address (for many address perf reports correctly). Nothing is written in kern.log
Created attachment 275931 [details] config file