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Re: [Qemu-devel] [PATCH v4.1] Add optionrom compatible with fw_cfg DMA v
Re: [Qemu-devel] [PATCH v4.1] Add optionrom compatible with fw_cfg DMA version
Tue, 05 Apr 2016 09:29:28 +0200
On Mo, 2016-04-04 at 16:21 +0100, Richard W.M. Jones wrote:
> On Mon, Apr 04, 2016 at 04:02:04PM +0100, Stefan Hajnoczi wrote:
> > (1) initrd loading is broken, kernel complains it finds only gibberish:
> > [ 0.934582] Unpacking initramfs...
> > [ 1.166983] Initramfs unpacking failed: junk in compressed archive
> > [ 1.168458] Freeing initrd memory: 32812k freed
> That's strange. I certainly never saw anything like this. I wonder
> if it's because your initrd is particularly large?
I've simply used /boot/initramfs-$version from the host. It's 33M. Not
exactly small, but given this is a standard RHEL-7 install I also
wouldn't rate this as unusual big.
> > (2) going back to non-dma boot via -M pc-$old doesn't work, appearently
> > fw_cfg dma is enabled even for old machine types.
> IIRC there was a thread about how we accidentally added DMA to old
> machine types. Does this matter?
That one should be fixed meanwhile.
Re: [Qemu-devel] [PATCH v4.1] Add optionrom compatible with fw_cfg DMA version, Michael S. Tsirkin, 2016/04/04