#include #include #include #include #include #include "corking.h" #include "die.h" void set_udp_cork(int fd) { int ret, state = 1; ret = setsockopt(fd, IPPROTO_UDP, UDP_CORK, &state, sizeof(state)); if (unlikely(ret)) panic("Cannot cork UDP socket!\n"); } void set_udp_uncork(int fd) { int ret, state = 0; ret = setsockopt(fd, IPPROTO_UDP, UDP_CORK, &state, sizeof(state)); if (unlikely(ret)) panic("Cannot uncork UDP socket!\n"); } void set_tcp_cork(int fd) { int ret, state = 1; ret = setsockopt(fd, IPPROTO_TCP, TCP_CORK, &state, sizeof(state)); if (unlikely(ret)) panic("Cannot cork TCP socket!\n"); } void set_tcp_uncork(int fd) { int ret, state = 0; ret = setsockopt(fd, IPPROTO_TCP, TCP_CORK, &state, sizeof(state)); if (unlikely(ret)) panic("Cannot uncork TCP socket!\n"); } void set_sock_cork(int fd, bool is_udp) { if (is_udp) set_udp_cork(fd); else set_tcp_cork(fd); } void set_sock_uncork(int fd, bool is_udp) { if (is_udp) set_udp_uncork(fd); else set_tcp_uncork(fd); } ster net-next plumbingsTobias Klauser
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authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /include/drm/drmP.h
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (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/drm/drmP.h')