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From: Paolo Bonzini <pbonzini@redhat.com>
To: Nate Case <ncase@xes-inc.com>, kvm@vger.kernel.org
Subject: Re: Guest memory backed by PCI BAR (x86)
Date: Thu, 26 Mar 2015 15:02:43 +0100	[thread overview]
Message-ID: <55141183.9000304@redhat.com> (raw)
In-Reply-To: <1790936111.88330.1427298998015.JavaMail.zimbra@xes-inc.com>



On 25/03/2015 16:56, Nate Case wrote:
> I was hoping I could then use a PCI sysfs resource file instead of a
> tmpfs file (i.e., /sys/bus/pci/devices/dddd:bb:ss.f/resourceN) to
> achieve the desired effect.  But I haven't been able to get Linux or
> memtest86+ to boot with this arrangement.  It only boots when KVM
> acceleration is disabled.
> 
> When KVM acceleration is enabled, SeaBIOS seems to function fine
> running out of PCI memory space, but booting the OS resets.
> Specifically, the following happens (I'll stick with the memtest86+
> 5.01 test case for simplicity):

Hi,

please include a trace file of the failure, obtained using "trace-cmd
record -e kvm/* -e kvmmmu/*".

Thanks,

Paolo

  reply	other threads:[~2015-03-26 14:02 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-25 15:56 Guest memory backed by PCI BAR (x86) Nate Case
2015-03-26 14:02 ` Paolo Bonzini [this message]
2015-03-26 16:01   ` Nate Case
2015-03-26 16:07     ` Paolo Bonzini
2015-03-26 16:34       ` Nate Case
2015-03-26 16:40         ` Paolo Bonzini
2015-03-26 16:52           ` Nate Case
2015-03-26 17:04             ` Paolo Bonzini
2015-03-26 17:14               ` Nate Case
2015-03-27 15:27               ` Nate Case

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