Date: Thu, 01 Jun 2017 21:10:11 +0200 From: Harry Schmalzbauer <freebsd@omnilan.de> To: Stephen Mcconnell <stephen.mcconnell@broadcom.com> Cc: freebsd-scsi@freebsd.org, Scott Long <scottl@freebsd.org> Subject: Re: sporadic CAM (all devices) outage on 11-stable, mps(4), ahci(4) and bhyve(8) involved. [Was: Re: mps(4) blocks panic-reboot] Message-ID: <59306693.6080304@omnilan.de> In-Reply-To: <f5bf40b2814ea894abab8bde8acb16bb@mail.gmail.com> References: <592FDE8C.1090609@omnilan.de> 12a36df9eff99c77ec621987efbe75fe@mail.gmail.com <ff9342e2e1eb541f347d9f683cfc8214@mail.gmail.com> <59303484.1040609@omnilan.de> <e6fe7cc17fb1302caf2122eaa11d10ba@mail.gmail.com> <593056E9.6000807@omnilan.de> <d48587b45e608cd519155d19567d03af@mail.gmail.com> <59305D4F.40707@omnilan.de> <f5bf40b2814ea894abab8bde8acb16bb@mail.gmail.com>
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Bezüglich Stephen Mcconnell's Nachricht vom 01.06.2017 20:55 (localtime): > Take a look at PR 212914. Could that be the issue? It was MFC'd to stable/11 > with r309273 on Nov 28th, 2016. Thanks a lot, but that's unrelated. The "readded" phenomen wasn't true and last occurance of that simultanious drives disappearance was 3 weeks ago (on r317xxx). But it was before I completely got rid of unionfs usage. Since I use(d) a panic-workarround-patch for unionfs, these deadlocks could happen and I hoped that could be to blame for the quoted symptom, for which I couldn't imagine any other cause yet. Thanks, -harry
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