Re: [Crash-utility] arm64: doesn't work for kernel v5.4?

----- Original Message ----- > Hi Dave, > > I tried to use crash v7.2.7 with kernel v5.4-rc1 on arm64. > > 1. VA_BITS_ACTUAL is missing in vmcoreinfo. > Does anyone work on fixing it on kernel side? > (just adding one or two lines though) > > 2. With a tweak above, I still fail to run crash with vmcore > seeing the following errors; > (I didn't dig into details) > > crash-arm64: invalid kernel virtual address: ffff800010c689a8 type: "kernel_config_data" > WARNING: cannot read kernel_config_data > crash-arm64: invalid kernel virtual address: ffff80001177a160 type: "possible" > WARNING: cannot read cpu_possible_map > crash-arm64: invalid kernel virtual address: ffff80001177a140 type: "present" > WARNING: cannot read cpu_present_map > crash-arm64: invalid kernel virtual address: ffff80001177a120 type: "online" > WARNING: cannot read cpu_online_map > crash-arm64: invalid kernel virtual address: ffff80001177a188 type: "active" > WARNING: cannot read cpu_active_map > crash-arm64: invalid kernel virtual address: ffff80001196afe0 type: "shadow_timekeeper xtime_sec" > crash-arm64: invalid kernel virtual address: ffff800011782b3c type: "init_uts_ns" > WARNING: invalid linux_banner pointer: ffff800010c500e8 > crash: vmlinux.1003 and vmcore.1003 do not match! > > Have you noticed this issue? I have been waiting for our internal 5.4-rc1 based ARK kernel to be built, and it looks like it should be available soon. But I did not expect crash to work on arm64 in 5.4. I put in a bunch of 52-bit support into the crash utility last spring, but it was based upon an early proposed patch-set from Steve Capper that Chris von Recklinghausen backported to our 4.18.0-80.el8 kernel at the time. I believe Chris may have added the VA_BITS_ACTUAL vmcoreinfo entry (?), and I'm presuming there will be other VM-related things that are different from that original kernel patch. Thanks, Dave