From: Gerd Hoffmann <kraxel@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v2 2/5] pci: store PCI hole ranges in guestinfo structure
Date: Fri, 31 May 2013 07:43:37 +0200 [thread overview]
Message-ID: <51A83889.60609@redhat.com> (raw)
In-Reply-To: <20130530125503.GE12791@redhat.com>
Hi,
> I see. I'll figure out the details and add a comment to this end.
>
> But that's for the 32 bit window - I don't see it playing
> with mtrrs for the 64 bit ranges.
> So I'm guessing alignment isn't needed there, right?
mtrr's are a 32bit thing anyway IIRC.
I still would place the 64bit window aligned. Given that 36 physical
address lines (-> 64G address space) used to be quite common until
recently I think reserving 16G from 64G downwards would be a good pick.
For guests with *lots* of memory we could move the hole to be just
below 1T and maybe also make it larger.
cheers,
Gerd
next prev parent reply other threads:[~2013-05-31 5:43 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-30 11:07 [Qemu-devel] [PATCH v2 0/5] pc: pass pci window data to guests Michael S. Tsirkin
2013-05-30 11:07 ` [Qemu-devel] [PATCH v2 1/5] range: add Range structure Michael S. Tsirkin
2013-05-31 2:41 ` Hu Tao
2013-05-30 11:07 ` [Qemu-devel] [PATCH v2 2/5] pci: store PCI hole ranges in guestinfo structure Michael S. Tsirkin
2013-05-30 12:16 ` Gerd Hoffmann
2013-05-30 12:19 ` Michael S. Tsirkin
2013-05-30 12:32 ` Gerd Hoffmann
2013-05-30 12:55 ` Michael S. Tsirkin
2013-05-31 5:43 ` Gerd Hoffmann [this message]
2013-05-30 12:25 ` Laszlo Ersek
2013-05-30 12:45 ` Michael S. Tsirkin
2013-05-31 3:26 ` Hu Tao
2013-05-30 11:07 ` [Qemu-devel] [PATCH v2 3/5] pc: pass PCI hole ranges to Guests Michael S. Tsirkin
2013-05-30 11:07 ` [Qemu-devel] [PATCH v2 4/5] pc: add 1.6 compat type Michael S. Tsirkin
2013-05-30 15:55 ` Andreas Färber
2013-05-30 17:40 ` Michael S. Tsirkin
2013-05-30 11:07 ` [Qemu-devel] [PATCH v2 5/5] pc: pci-info add compat support Michael S. Tsirkin
2013-05-30 16:32 ` Laszlo Ersek
2013-05-30 17:39 ` Michael S. Tsirkin
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