Messages in this thread | | | From | Amit Shah <> | Subject | [PATCH 00/11] virtio: Support for hibernation (S4) | Date | Thu, 29 Sep 2011 20:55:56 +0530 |
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Hello,
These patches add support for S4 to virtio (pci) and all drivers. The patches are based on the virtio-console patch series in Rusty's queue.
For each driver, all vqs are removed before hibernation, and then re-created after restore.
All the drivers in testing work fine:
* virtio-blk is used for the only disk in the VM, IO works fine before and after.
* virtio-console: port IO keeps working fine before and after. * If a port is waiting for data from the host (blocking read(2) call), this works fine in both the cases: host-side connection is available or unavailable after resume. In case the host-side connection isn't available, the blocking call is terminated. If it is available, the call continues to remain in blocked state till further data arrives.
* virtio-net: ping remains active across S4. One packet is lost. (Current qemu.git has a regression in slirp code causing qemu segfault, commit 1ab74cea060 is the offender).
* virtio-balloon: Works fine before and after. Forgets the ballooned value across S4. If it's desirable to maintain the ballooned value, a new config option can be created to do this.
All in all, this looks pretty good.
Please review and apply.
Amit Shah (11): virtio: pci: switch to new PM API virtio-pci: add PM notification handlers for restore, freeze, thaw, poweroff virtio: console: Move out vq and vq buf removal into separate functions virtio: console: Add freeze and restore handlers to support S4 virtio: blk: Move out vq initialization to separate function virtio: blk: Add freeze, restore handlers to support S4 virtio: net: Move out vq initialization into separate function virtio: net: Move out vq and vq buf removal into separate function virtio: net: Add freeze, restore handlers to support S4 virtio: balloon: Move out vq initialization into separate function virtio: balloon: Add freeze, restore handlers to support S4
drivers/block/virtio_blk.c | 36 ++++++++++-- drivers/char/virtio_console.c | 124 ++++++++++++++++++++++++++++++--------- drivers/net/virtio_net.c | 98 ++++++++++++++++++++++--------- drivers/virtio/virtio_balloon.c | 65 +++++++++++++++------ drivers/virtio/virtio_pci.c | 57 +++++++++++++++++- include/linux/virtio.h | 4 + 6 files changed, 301 insertions(+), 83 deletions(-)
-- 1.7.6.2
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