Re: port-amd64/52222 (One-off kernel panic in x86 pmap)

To: port-amd64-maintainer%netbsd.org@localhost,netbsd-bugs%netbsd.org@localhost,gnats-admin%netbsd.org@localhost,maya%NetBSD.org@localhost,coypu%sdf.org@localhost
Subject: Re: port-amd64/52222 (One-off kernel panic in x86 pmap)
From: maya%NetBSD.org@localhost
Date: Sat, 17 Jun 2017 17:44:50 +0000 (UTC)

Synopsis: One-off kernel panic in x86 pmap

State-Changed-From-To: open->analyzed
State-Changed-By: maya%NetBSD.org@localhost
State-Changed-When: Sat, 17 Jun 2017 17:44:50 +0000
State-Changed-Why:
This is caused because pmap_extract falsely believes it is on the same cpu due to kpreempt_disable. this is not true, as we allow migrating of kernel threads with preemption disabled.

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