/* * Copyright 2014, Michael Ellerman, IBM Corp. * Licensed under GPLv2. */ #ifndef _SELFTESTS_POWERPC_PMU_EBB_TRACE_H #define _SELFTESTS_POWERPC_PMU_EBB_TRACE_H #include "utils.h" #define TRACE_TYPE_REG 1 #define TRACE_TYPE_COUNTER 2 #define TRACE_TYPE_STRING 3 #define TRACE_TYPE_INDENT 4 #define TRACE_TYPE_OUTDENT 5 struct trace_entry { u8 type; u8 length; u8 data[0]; }; struct trace_buffer { u64 size; bool overflow; void *tail; u8 data[0]; }; struct trace_buffer *trace_buffer_allocate(u64 size); int trace_log_reg(struct trace_buffer *tb, u64 reg, u64 value); int trace_log_counter(struct trace_buffer *tb, u64 value); int trace_log_string(struct trace_buffer *tb, char *str); int trace_log_indent(struct trace_buffer *tb); int trace_log_outdent(struct trace_buffer *tb); void trace_buffer_print(struct trace_buffer *tb); void trace_print_location(struct trace_buffer *tb); #endif /* _SELFTESTS_POWERPC_PMU_EBB_TRACE_H */ f33d34bb6751c874a9c00980552fe508c'/> 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/sound/ad1843.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/sound/ad1843.h')