Dexuan Cui 433e19cf33 Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read() ... Commit a389fcfd2c ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2c ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-01-31 10:59:48 +01:00
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Kconfig	x86: Make Linux guest support optional	2013-03-04 13:14:25 -08:00
Makefile	Drivers: hv: util: introduce hv_utils_transport abstraction	2015-05-24 12:17:41 -07:00
channel.c	Drivers: hv: vmbus: On the read path cleanup the logic to interrupt the host	2016-11-07 10:01:18 +01:00
channel_mgmt.c	hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels()	2016-12-06 11:10:54 +01:00
connection.c	uio-hv-generic: new userspace i/o driver for VMBus	2016-12-06 11:52:49 +01:00
hv.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
hv_balloon.c	Drivers: hv: balloon: Fix info request to show max page count	2016-11-07 10:01:17 +01:00
hv_fcopy.c	Drivers: hv: utils: fix a race on userspace daemons registration	2016-08-31 13:05:41 +02:00
hv_kvp.c	Drivers: hv: utils: fix a race on userspace daemons registration	2016-08-31 13:05:41 +02:00
hv_snapshot.c	Drivers: hv: vss: Operation timeouts should match host expectation	2016-11-07 10:01:17 +01:00
hv_util.c	Drivers: hv: utils: Fix the mapping between host version and protocol to use	2016-11-07 10:01:17 +01:00
hv_utils_transport.c	Drivers: hv: utils: fix a race on userspace daemons registration	2016-08-31 13:05:41 +02:00
hv_utils_transport.h	Drivers: hv: utils: fix a race on userspace daemons registration	2016-08-31 13:05:41 +02:00
hyperv_vmbus.h	Drivers: hv: vmbus: On the read path cleanup the logic to interrupt the host	2016-11-07 10:01:18 +01:00
ring_buffer.c	Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()	2017-01-31 10:59:48 +01:00
vmbus_drv.c	vmbus: add support for dynamic device id's	2016-12-06 11:52:49 +01:00