diff options
| author | K. Y. Srinivasan <kys@microsoft.com> | 2016-11-06 13:14:16 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-14 15:25:38 -0800 |
| commit | afbb98f91d3be20c62bcbdf0de084056325b7be2 (patch) | |
| tree | 42f560f0cb5bbe6b81a78a1982208f262b85e5d9 /drivers/hv/channel_mgmt.c | |
| parent | e68f0dbb6bb0f0487a8ae2a117ae1950b6656f1a (diff) | |
Drivers: hv: vmbus: Base host signaling strictly on the ring state
commit 74198eb4a42c4a3c4fbef08fa01a291a282f7c2e upstream.
One of the factors that can result in the host concluding that a given
guest in mounting a DOS attack is if the guest generates interrupts
to the host when the host is not expecting it. If these "spurious"
interrupts reach a certain rate, the host can throttle the guest to
minimize the impact. The host computation of the "expected number
of interrupts" is strictly based on the ring transitions. Until
the host logic is fixed, base the guest logic to interrupt solely
on the ring state.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: Rolf Neugebauer <rolf.neugebauer@docker.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/channel_mgmt.c')
| -rw-r--r-- | drivers/hv/channel_mgmt.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 1bc1d4795243..caf341842464 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -449,8 +449,6 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel) } dev_type = hv_get_dev_type(newchannel); - if (dev_type == HV_NIC) - set_channel_signal_state(newchannel, HV_SIGNAL_POLICY_EXPLICIT); init_vp_index(newchannel, dev_type); |