#ifndef __PERF_CPUMAP_H #define __PERF_CPUMAP_H #include #include #include #include "perf.h" #include "util/debug.h" struct cpu_map { atomic_t refcnt; int nr; int map[]; }; struct cpu_map *cpu_map__new(const char *cpu_list); struct cpu_map *cpu_map__empty_new(int nr); struct cpu_map *cpu_map__dummy_new(void); struct cpu_map *cpu_map__new_data(struct cpu_map_data *data); struct cpu_map *cpu_map__read(FILE *file); size_t cpu_map__snprint(struct cpu_map *map, char *buf, size_t size); size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp); int cpu_map__get_socket_id(int cpu); int cpu_map__get_socket(struct cpu_map *map, int idx, void *data); int cpu_map__get_core_id(int cpu); int cpu_map__get_core(struct cpu_map *map, int idx, void *data); int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp); int cpu_map__build_core_map(struct cpu_map *cpus, struct cpu_map **corep); struct cpu_map *cpu_map__get(struct cpu_map *map); void cpu_map__put(struct cpu_map *map); static inline int cpu_map__socket(struct cpu_map *sock, int s) { if (!sock || s > sock->nr || s < 0) return 0; return sock->map[s]; } static inline int cpu_map__id_to_socket(int id) { return id >> 16; } static inline int cpu_map__id_to_cpu(int id) { return id & 0xffff; } static inline int cpu_map__nr(const struct cpu_map *map) { return map ? map->nr : 1; } static inline bool cpu_map__empty(const struct cpu_map *map) { return map ? map->map[0] == -1 : true; } int cpu__setup_cpunode_map(void); int cpu__max_node(void); int cpu__max_cpu(void); int cpu__get_node(int cpu); int cpu_map__build_map(struct cpu_map *cpus, struct cpu_map **res, int (*f)(struct cpu_map *map, int cpu, void *data), void *data); int cpu_map__cpu(struct cpu_map *cpus, int idx); bool cpu_map__has(struct cpu_map *cpus, int cpu); int cpu_map__idx(struct cpu_map *cpus, int cpu); #endif /* __PERF_CPUMAP_H */ 00980552fe508c'>treecommitdiff
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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 /net/llc/llc_pdu.c
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 'net/llc/llc_pdu.c')