Bug 2170286

Summary:	crash tool supports parsing the maple tree data structures and functions
Product:	Red Hat Enterprise Linux 9	Reporter:	lijiang
Component:	crash	Assignee:	ltao
Status:	NEW ---	QA Contact:	xiaoying yan <yiyan>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	9.3	CC:	jieli, ltao, prudo, ruyang
Target Milestone:	rc	Keywords:	Patch, TestOnly, Triaged
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Hardware:	Unspecified
OS:	Unspecified
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description lijiang 2023-02-16 02:50:55 UTC

Description of problem:

The maple tree is introduced into upstream kernel 6.1:
[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=524e00b36e8c547f5582eef3fb645a8d9fc5e3df
[2]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=763ecb035029f500d7e6dc99acd1ad299b7726a1
    
Crash tool needs to support parsing the vmcore with a maple tree feature, otherwise some crash commands may not work, such as vm and fuser.

In ddition, the tree command can also dump the maple tree information.

Related crash patches:

872cad2d63b3 ("Port the maple tree data structures and functions")
16a696762cbf ("Add maple tree support to "tree" command")
222176a0a6c1 ("Add do_maple_tree() for maple tree operations")
9efc1f68a44f ("Introduce maple tree vma iteration to vm_area_dump()")
49f6c2095d82 ("Update the help text of "tree" command for maple tree")
46344aa2f92b ("Dump maple tree offset variables by "help -o"")



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Comment 5 ltao 2023-05-31 01:41:52 UTC

We will defer the bz to rhel9.4 due to https://bugzilla.redhat.com/show_bug.cgi?id=2166668#c31.