crash: page excluded: kernel virtual address: ffff0001004dc028 type: "xa_node.slots[off]"

[shawn8172014]

[shawn8172014]

root@shawn:/var/crash/202309260742# crash dump.202309260742 ~/linux/vmlinux

crash 8.0.3++
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Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
Copyright (C) 2015, 2021 VMware, Inc.
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please wait... (gathering task table data)
crash: page excluded: kernel virtual address: ffff0001004dc028 type: "xa_node.slots[off]"

[muryliang]

I encountered the same problem with upsteam linux-stable v6.5.4 and crash utility both version 8.0.3 and master branch.

---

I also tried

1. long-maintained upstream kernel v6.1.55, which is ok with crash utility vesion 8.0.3.
2. ubuntu 23.04's kernel6.2.16(custom build of official 6.2.0-33-generic), which will still report crash: page excluded: kernel virtual address: xxxxxxxxxxx type: "xa_node.slots[off]"

so there must be something changed in more recent kernels which break the crash utility

[k-hagio]

Hi muryliang,
What is the version of makedumpfile that you're using to capture the vmcore?

I saw a similar message on Linux 6.2 once [1], upstream makedumpfile-1.7.3 and later support Linux 6.2.
For Ubuntu makedumpfile, please consult Ubuntu community.
[1] makedumpfile/makedumpfile@5f17bdd

[k-hagio]

For Ubuntu makedumpfile, please consult Ubuntu community.

Probably this is it: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/2038248
Please try.

[muryliang]

Hi k-hagio,
After upgrade to makedumpfile v1.7.3 from v1.7.2, both upstream kernel v6.5.4 and ubuntu's kernel v6.2 now can be sucessfully handled by crash v8.0.3. Thanks for your help.