| Age | Commit message (Expand) | Author | Files | Lines |
|---|---|---|---|---|
| 2017-02-07 | udp: properly cope with csum errors | Eric Dumazet | 1 | -1/+3 |
| 2017-02-04 | netlabel: out of bound access in cipso_v4_validate() | Eric Dumazet | 1 | -0/+4 |
| 2017-02-03 | ipv6: sr: remove cleanup flag and fix HMAC computation | David Lebrun | 1 | -6/+3 |
| 2017-02-01 | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net | Linus Torvalds | 4 | -19/+26 |
| 2017-02-01 | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vir... | Linus Torvalds | 1 | -0/+1 |
| 2017-02-01 | net: fix ndo_features_check/ndo_fix_features comment ordering | Dimitris Michailidis | 1 | -14/+15 |
| tree | ce6547ef2987fbb289fa28f03536328a42781651 /include/uapi/drm/msm_drm.h | |||
| parent | 191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff) | |||
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("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: a389fcfd2cb5 ("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>
Diffstat (limited to 'include/uapi/drm/msm_drm.h')