Daniel Di Giacomo
2012-Sep-03 16:25 UTC
Re: PCI passthrough for domU allocated with more than 4G memory
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Same problem here. I''m using gentoo with kernel 3.5.3 (gentoo-sources) and XEN 4.1.2 as dom0. DomU is also gentoo with the same kernel version. When I assign more than 4G memory to this domU, the memory for the passed-through Intel-gigabit-nic cannot be allocated and the initialization of the device fails. With 3968M memory assigned everything works fine. Assigning 8GB RAM to domU works without any problems, when I use the old kernel-version 2.6.34 (xen-sources) in domU. Regards Daniel -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://www.enigmail.net/ iQIcBAEBAgAGBQJQRNn9AAoJEO8IGUBgh06fhtwQAJ0eocxHWeiEJSROM5SObIAm V/ZulEaLOg/XmavL0KWGeNgHA3N/JtAvKMvpzLxjsGszFFD3h9ndtX0eRHnQPYC3 38tMNjIGllUzEiHl5ESCnaChrekI6/hH7NYqoMmXndbJkexUmlaJyRd6Rgy4SIhn k6x2nwYG9gIg6wMVbQadbosYxOPKdKRosL1mglBuzK/J/c5hdqzxK4j6DfMVHonx aXw1B1/Ga7zxwG9651bheCrDbXi8yVqadGoXjXZWhp2vQSxwh4k2QgOaTY5vgOjJ UTkuhtlrAI3ZdyCHpLq8dd8oS6QUyQmjJdbQe5kTMufA5GGl4b//zU4pDieOqkFp YCAPghCDk+l691Lg/UkvVgj4jgbTDsvcYtF3uM8h+dOs4L1R36WgSsuAqvwT+LjH DWc5g7h6VsML4J5gcXsG0IvLycHvWhpiDbJD8gp0qzcXAamMRcBkAJhVal4JnwmI 2f4WMPyVEGjkRUgV22AOgNTjflxG9Rla9CbnPamYj4yVh47lsRix+hlZbrPUl3MW V9UsKUpt+E6dCl56dq7YziZkZj9iLABG+j4rKNk93DTJMgPbwXck4BCXIrztm+s+ Y3QAh+5k0aM/Om3nUftcYrF3z8TDHWTCCXA/JRQ6G/PAo+K19pom6KpjanZQ41IC G0t3eBJdeJpCNNvgtXiM =QheK -----END PGP SIGNATURE-----
Pasi Kärkkäinen
2012-Sep-04 17:15 UTC
Re: PCI passthrough for domU allocated with more than 4G memory
On Mon, Sep 03, 2012 at 06:25:37PM +0200, Daniel Di Giacomo wrote:> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Same problem here. > I''m using gentoo with kernel 3.5.3 (gentoo-sources) and XEN 4.1.2 as dom0. > DomU is also gentoo with the same kernel version. > When I assign more than 4G memory to this domU, the memory for the > passed-through Intel-gigabit-nic cannot be allocated and the > initialization of the device fails. > With 3968M memory assigned everything works fine. > Assigning 8GB RAM to domU works without any problems, when I use the > old kernel-version 2.6.34 (xen-sources) in domU. >I think you need Xen 4.2 and e820_host=1 option. -- Pasi