Mailing List Archive: [PATCH 0 of 2] Paging support updates for XCP dom0

This is a cherry pick of two patches that add support for guest paged out
frames in the XCP 2.6.32 dom0 patch queue.

First patch propagates the ENOENT returned by the hypervisor in the case
of a paged out page, all the way up the call chain to the MMAPBATCH_V2
ioctl. The ioctl is mainly used to harvest those return values and retry.

The second patch adds retry loops to all backend grant operations (map and
netback copy), in the case of a paged out frame.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Patrick Colp <pjcolp@cs.ubc.ca>
Acked-by: Andres Lagar-Cavilla <andres@lagarcavilla>
Ported and submitted by Andres Lagar-Cavilla

arch/x86/mm/ioremap-xen.c | 12 ++----
drivers/xen/blkback/blkback.c | 6 ++-
drivers/xen/blkback/interface.c | 9 +++-
drivers/xen/core/gnttab.c | 4 +-
drivers/xen/gntdev/gntdev.c | 49 +++++++++++++++++------------
drivers/xen/netback/interface.c | 5 +-
drivers/xen/netback/netback.c | 16 ++++++---
drivers/xen/scsiback/interface.c | 10 +++---
drivers/xen/scsiback/scsiback.c | 4 +-
drivers/xen/tpmback/interface.c | 7 +--
drivers/xen/tpmback/tpmback.c | 20 ++++-------
drivers/xen/usbback/interface.c | 16 ++++----
drivers/xen/usbback/usbback.c | 4 +-
drivers/xen/xenbus/xenbus_backend_client.c | 10 +++---
include/xen/gnttab.h | 37 ++++++++++++++++++++++
15 files changed, 130 insertions(+), 79 deletions(-)

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>>> On 01.12.11 at 21:51, Andres Lagar-Cavilla <andres@lagarcavilla.org> wrote:
> This is a cherry pick of two patches that add support for guest paged out
> frames in the XCP 2.6.32 dom0 patch queue.

The better thing would probably be to re-base the tree to current
SLE11 SP1 sources. Not sure who would do that though (and also
not sure what state the tree is in maintenance wise). Ian?

Jan

> First patch propagates the ENOENT returned by the hypervisor in the case
> of a paged out page, all the way up the call chain to the MMAPBATCH_V2
> ioctl. The ioctl is mainly used to harvest those return values and retry.
>
> The second patch adds retry loops to all backend grant operations (map and
> netback copy), in the case of a paged out frame.
>
> Signed-off-by: Olaf Hering <olaf@aepfle.de>
> Signed-off-by: Jan Beulich <jbeulich@novell.com>
> Acked-by: Patrick Colp <pjcolp@cs.ubc.ca>
> Acked-by: Andres Lagar-Cavilla <andres@lagarcavilla>
> Ported and submitted by Andres Lagar-Cavilla
>
> arch/x86/mm/ioremap-xen.c | 12 ++----
> drivers/xen/blkback/blkback.c | 6 ++-
> drivers/xen/blkback/interface.c | 9 +++-
> drivers/xen/core/gnttab.c | 4 +-
> drivers/xen/gntdev/gntdev.c | 49 +++++++++++++++++------------
> drivers/xen/netback/interface.c | 5 +-
> drivers/xen/netback/netback.c | 16 ++++++---
> drivers/xen/scsiback/interface.c | 10 +++---
> drivers/xen/scsiback/scsiback.c | 4 +-
> drivers/xen/tpmback/interface.c | 7 +--
> drivers/xen/tpmback/tpmback.c | 20 ++++-------
> drivers/xen/usbback/interface.c | 16 ++++----
> drivers/xen/usbback/usbback.c | 4 +-
> drivers/xen/xenbus/xenbus_backend_client.c | 10 +++---
> include/xen/gnttab.h | 37 ++++++++++++++++++++++
> 15 files changed, 130 insertions(+), 79 deletions(-)

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