Re: kern/57450 (unplugging hung USB disk triggers panic via _vstate_assert)

To: hannken%netbsd.org@localhost, kern-bug-people%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, hannken%NetBSD.org@localhost, chuq%chuq.com@localhost
Subject: Re: kern/57450 (unplugging hung USB disk triggers panic via _vstate_assert)
From: hannken%NetBSD.org@localhost
Date: Mon, 12 Jun 2023 10:55:50 +0000 (UTC)

Synopsis: unplugging hung USB disk triggers panic via _vstate_assert

Responsible-Changed-From-To: kern-bug-people->hannken
Responsible-Changed-By: hannken%NetBSD.org@localhost
Responsible-Changed-When: Mon, 12 Jun 2023 10:55:49 +0000
Responsible-Changed-Why:
Take -- I broke it with revision 1,376 of sys/ufs/ffs/ffs_vfsops.c

It is not ok to unlock/relock the device node here, VOP_FSYNC must
never drop the lock as vcache_reclaim() for example depends on
this behaviour.

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