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Date:      Mon, 18 Sep 2017 19:13:54 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 222234] head -r323246 aarch64 (Pine64+ 2GB) boot time context, sometimes: acquiring blockable sleep lock with spinlock or critical section held
Message-ID:  <bug-222234-8-4Re1khX2oW@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-222234-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-222234-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222234

--- Comment #6 from Mark Millard <markmi@dsl-only.net> ---
Created attachment 186517
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D186517&action=
=3Dedit
Example patch for sys/arm64/arm64/identcpu.c 's sev instruction use

Beyond the release_aps use of SEV during boot
I found a SEV use in identcpus.c . So this is
a possible patch for that (for the same issue
of SEV not being timed relative to memory
updates).

I do not claim either patch has the optimal
form of dsb ??? instruction, just one that
seems (more then?) sufficient.

--=20
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