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authorK. Y. Srinivasan <kys@microsoft.com>2016-11-06 13:14:16 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-07 10:01:17 +0100
commit74198eb4a42c4a3c4fbef08fa01a291a282f7c2e (patch)
tree896b7e4abbabdafdd892bbcdfeaff3dbb0258e90 /drivers/hv/channel_mgmt.c
parent0c38cda64aecb4a821210bb2d3d04092c181c0ae (diff)
downloadlinux-74198eb4a42c4a3c4fbef08fa01a291a282f7c2e.tar.bz2
Drivers: hv: vmbus: Base host signaling strictly on the ring state
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/channel_mgmt.c')
-rw-r--r--drivers/hv/channel_mgmt.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 96a85cd39580..cbb96f2f0d1a 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -447,8 +447,6 @@ 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);