From: Alex Williamson <alex.williamson@redhat.com>
To: Xuekun Hu <xuekun.hu@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: the number of PCI pass-through devices limit?
Date: Mon, 26 Jan 2015 08:13:20 -0700 [thread overview]
Message-ID: <1422285200.4048.36.camel@redhat.com> (raw)
In-Reply-To: <CACLBhCR7XtTWmCCyfUPkqU8vRt=o2bqe1M1tm4WwnH8-gGtR9w@mail.gmail.com>
On Mon, 2015-01-26 at 16:46 +0800, Xuekun Hu wrote:
> Hi, All
>
> Is there a limit for number of PCI pass-through devices in KVM? For
> Legacy PCI device assignement or VFIO pass-through method?
There's no enforced limit, but the usable limit is related to the number
of KVM memory slots available. Each PCI BAR uses a memory slot
(sometimes two). If memory slots are exhausted, the the VM aborts.
Thanks,
Alex
prev parent reply other threads:[~2015-01-26 15:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-26 8:46 the number of PCI pass-through devices limit? Xuekun Hu
2015-01-26 15:13 ` Alex Williamson [this message]
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