[Bug 231296] smartpqi - kernel panics

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231296

--- Comment #12 from Josh Gitlin <jgitlin+freebsd at goboomtown.com> ---
(In reply to Andriy Gapon from comment #10)

> it's quite possible that ARC contributes to the problem but
> there is a bug in kmem_back / kmem_malloc.

This is what I felt as well when reading the source. I didn't see any specific
out of memory error, but rather a page fault which (to my untrained eye) looked
like the kernel trying to access a KVA page that did not exist. But I was very
unsure of my theory that it was a bug as opposed to a misconfiguration.

What I found odd was that we had crashes on production systems where the config
in place hadn't changed in years...

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