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I was compiling a kernel and also played a youtube video in firefox and maybe evolution. meminfo.txt and lscpu.txt files are attached. The following is a part from "dmesg -l warn" -------------------x--------------x-------------x------------ smpboot: Scheduler frequency invariance went wobbly, disabling! [ 1112.592866] unchecked MSR access error: RDMSR from 0x123 at rIP: 0xffffffffb5c9a184 (native_read_msr+0x4/0x30) [ 1112.592869] Call Trace: [ 1112.592876] update_srbds_msr+0x6f/0xb0 [ 1112.592880] smp_store_cpu_info+0x8e/0xb0 [ 1112.592883] start_secondary+0x93/0x200 [ 1112.592887] ? set_cpu_sibling_map+0xcb0/0xcb0 [ 1112.592891] secondary_startup_64+0xa4/0xb0 [ 1112.592898] unchecked MSR access error: WRMSR to 0x123 (tried to write 0x0000000000000000) at rIP: 0xffffffffb5c9a264 (native_write_msr+0x4/0x20) [ 1112.592899] Call Trace: [ 1112.592902] update_srbds_msr+0x98/0xb0 [ 1112.592904] smp_store_cpu_info+0x8e/0xb0 [ 1112.592907] start_secondary+0x93/0x200 [ 1112.592911] ? set_cpu_sibling_map+0xcb0/0xcb0 [ 1112.592914] secondary_startup_64+0xa4/0xb0 [ 2915.106879] show_signal: 6 callbacks suppressed [ 6089.209343] WARNING: stack going in the wrong direction? at i915_gem_close_object+0x2fb/0x560 [i915] $ -----------------x---------------x----------------x------------ Linux debian 5.9.1-rc1+ #4 SMP Fri Oct 16 16:48:04 IST 2020 x86_64 GNU/Linux GNU Make 4.3 Binutils 2.35.1 Util-linux 2.36 Mount 2.36 Bison 3.7.2 Flex 2.6.4 Dynamic linker (ldd) 2.30 Procps 3.3.16 Kbd 2.3.0 Console-tools 2.3.0 Sh-utils 8.32 Udev 246 Reported-by: Jeffrin Jose T