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Date:      Sat, 14 Mar 2015 12:10:44 +0000
From:      Steven Hartland <killing@multiplay.co.uk>
To:        Konstantin Belousov <kostikbel@gmail.com>
Cc:        "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, Michael Fuckner <michael@fuckner.net>, Ryan Stone <rysto32@gmail.com>
Subject:   Re: Server with 3TB Crashing at boot
Message-ID:  <55042544.2080202@multiplay.co.uk>
In-Reply-To: <550423CC.9080409@multiplay.co.uk>
References:  <55015D3B.6030605@fuckner.net> <5501DD57.7030305@freebsd.org> <CAJ-Vmom%2BZy_6ZCcTA_h4LFL-wDdaCmbqAgN5shpOsBBgWJw1mg@mail.gmail.com> <5503234A.4060103@fuckner.net> <55032C1B.5030004@multiplay.co.uk> <CAFMmRNzmr0Z1vXYK5y2QLk3eyUqXyK8TELgh4KHZ%2BDQVDXWZAg@mail.gmail.com> <275339388.395931.1426279324879.JavaMail.open-xchange@ptangptang.store> <CAFMmRNya8ZV=D3z0dE1%2BDsprAVBvcHZFGN1g1Ezd8k84nE3kVA@mail.gmail.com> <5503DC66.40409@fuckner.net> <55041EF5.9080200@multiplay.co.uk> <20150314115733.GG2379@kib.kiev.ua> <550423CC.9080409@multiplay.co.uk>

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On 14/03/2015 12:04, Steven Hartland wrote:
> On 14/03/2015 11:57, Konstantin Belousov wrote:
>> On Sat, Mar 14, 2015 at 11:43:49AM +0000, Steven Hartland wrote:
>>> Thats failing in bus_dmamem_alloc so as a guess I'd say there's no 
>>> space
>>> below the 4GB boundary for the allocation of size qsize.
>> If this is indeed the case, laoder tunable hw.dmar.enable=1 could help.
>> I assume that machine of this class does have VT-d hardware, you might
>> need to enable it in BIOS.
> I don't see that sysctl on my 10.1 boxes, is that something only in 
> stable / current?
Ignore, looks like its "only" a tunable so not exposed via sysctl

Roll on 11 so we don't have that problem any more.

     Regards
     Steve



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