From owner-freebsd-xen@freebsd.org  Tue Oct 15 08:27:02 2019
Return-Path: <owner-freebsd-xen@freebsd.org>
Delivered-To: freebsd-xen@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id 795C11577B2
 for <freebsd-xen@mailman.nyi.freebsd.org>;
 Tue, 15 Oct 2019 08:27:02 +0000 (UTC)
 (envelope-from royger@freebsd.org)
Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 server-signature RSA-PSS (4096 bits)
 client-signature RSA-PSS (4096 bits) client-digest SHA256)
 (Client CN "smtp.freebsd.org",
 Issuer "Let's Encrypt Authority X3" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 46spSQ2gTPz3NLF;
 Tue, 15 Oct 2019 08:27:02 +0000 (UTC)
 (envelope-from royger@freebsd.org)
Received: from localhost (unknown [212.230.157.24])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate) (Authenticated sender: royger)
 by smtp.freebsd.org (Postfix) with ESMTPSA id D15C610EFB;
 Tue, 15 Oct 2019 08:27:01 +0000 (UTC)
 (envelope-from royger@freebsd.org)
Date: Tue, 15 Oct 2019 10:26:55 +0200
From: Roger Pau =?iso-8859-1?Q?Monn=E9?= <royger@freebsd.org>
To: Brian Buhrow <buhrow@nfbcal.org>
Cc: freebsd-xen@freebsd.org
Subject: Re: i/o is very slow on FreeBSD dom0 with Xen-4.12 and Freebsd-12
Message-ID: <20191015082655.GB14005@Air-de-Roger>
References: <CAPLaKK7TKGQ23njecW7UhHxvaSm+44Y+nkdPQ=_FSXZShniH2g@mail.gmail.com>
 <201910142145.x9ELj4c8008732@lothlorien.nfbcal.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <201910142145.x9ELj4c8008732@lothlorien.nfbcal.org>
User-Agent: Mutt/1.12.2 (2019-09-21)
X-BeenThere: freebsd-xen@freebsd.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Discussion of the freebsd port to xen - implementation and usage
 <freebsd-xen.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-xen>,
 <mailto:freebsd-xen-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-xen/>
List-Post: <mailto:freebsd-xen@freebsd.org>
List-Help: <mailto:freebsd-xen-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-xen>,
 <mailto:freebsd-xen-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 15 Oct 2019 08:27:02 -0000

On Mon, Oct 14, 2019 at 02:45:04PM -0700, Brian Buhrow wrote:
> 	hello.  Using: ioapic_ack=old causes the dom0 to crash.  Below are the
> logs.

Does the crash happen every time you boot with ioapic_ack=old?

[...]
> dev = gpt/gptroot, block = 1, fs = /
> panic: ffs_blkfree_cg: freeing free block
> cpuid = 2
> time = 1571088217
> KDB: stack backtrace:
> #0 0xffffffff80be78d7 at kdb_backtrace+0x67
> #1 0xffffffff80b9b4b3 at vpanic+0x1a3
> #2 0xffffffff80b9b303 at panic+0x43
> #3 0xffffffff80e87345 at ffs_blkrelease_finish+0x6e5
> #4 0xffffffff80e8433d at ffs_blkfree+0xad
> #5 0xffffffff80eb10af at softdep_get_depcounts+0x48bf
> #6 0xffffffff80eb0fe5 at softdep_get_depcounts+0x47f5
> #7 0xffffffff80ea195a at softdep_update_inodeblock+0x178a
> #8 0xffffffff80eab94a at softdep_request_cleanup+0xa8a
> #9 0xffffffff80e95272 at softdep_flushworklist+0x1a2
> #10 0xffffffff80e991df at softdep_unmount+0x4af
> #11 0xffffffff80b5be83 at fork_exit+0x83
> #12 0xffffffff8105061e at fork_trampoline+0xe
> Uptime: 1m59s
> Automatic reboot in 15 seconds - press a key on the console to abort

This looks like a file system error, likely some corruption caused by
previous reboots?

Ie: I'm not sure this is caused by Xen or rather by underlying errors
in the filesystem. At least there are no hardware errors on the log
AFAICT.

Thanks, Roger.