linux

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Rusty Russell 16440b5497 virtio_balloon: don't softlockup on huge balloon changes.

commit 1f74ef0f2d upstream.

When adding or removing 100G from a balloon:

    BUG: soft lockup - CPU#0 stuck for 22s! [vballoon:367]

We have a wait_event_interruptible(), but the condition is always true
(more ballooning to do) so we don't ever sleep.  We also have a
wait_event() for the host to ack, but that is also always true as QEMU
is synchronous for balloon operations.

Reported-by: Gopesh Kumar Chaudhary <gopchaud@in.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-05-13 13:59:41 +02:00

config.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

Kconfig

drivers/virtio: remove depends on CONFIG_EXPERIMENTAL

2013-01-11 11:39:04 -08:00

Makefile

virtio: remove CONFIG_VIRTIO_RING

2012-09-28 15:05:15 +09:30

virtio_balloon.c

virtio_balloon: don't softlockup on huge balloon changes.