[Bug 258932] panic: vm_page_free_prep: freeing mapped

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 04 Oct 2021 18:13:23 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258932

--- Comment #2 from Bryan Drewery <bdrewery@FreeBSD.org> ---
(In reply to Mark Johnston from comment #1)

> If the system is still in DDB, can you show output from the following:
> 
> db> x/gx 0xfffffe006b2d0510


db> x/gx 0xfffffe006b2d0510
0xfffffe006b2d0510:     fffff80b88576460

> This should print the address of the first element of the page's pv list, should > be an address of the form 0xffff8.*.  Then show the dword at that address:
> 
> db> x/gx 0xffff8...
>

db> x/gx 0xfffff80b88576460
0xfffff80b88576460:     811be5000

> Then do
>
> db> show pte <addr printed by the last command>


db> show pte 811be5000
VA 0x0000000811be5000 pml4e 0x0000000000000000

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