/* * Copyright(C) 2015 Linaro Limited. All rights reserved. * Author: Mathieu Poirier * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see . */ #ifndef INCLUDE__UTIL_PERF_CS_ETM_H__ #define INCLUDE__UTIL_PERF_CS_ETM_H__ /* Versionning header in case things need tro change in the future. That way * decoding of old snapshot is still possible. */ enum { /* Starting with 0x0 */ CS_HEADER_VERSION_0, /* PMU->type (32 bit), total # of CPUs (32 bit) */ CS_PMU_TYPE_CPUS, CS_ETM_SNAPSHOT, CS_HEADER_VERSION_0_MAX, }; /* Beginning of header common to both ETMv3 and V4 */ enum { CS_ETM_MAGIC, CS_ETM_CPU, }; /* ETMv3/PTM metadata */ enum { /* Dynamic, configurable parameters */ CS_ETM_ETMCR = CS_ETM_CPU + 1, CS_ETM_ETMTRACEIDR, /* RO, taken from sysFS */ CS_ETM_ETMCCER, CS_ETM_ETMIDR, CS_ETM_PRIV_MAX, }; /* ETMv4 metadata */ enum { /* Dynamic, configurable parameters */ CS_ETMV4_TRCCONFIGR = CS_ETM_CPU + 1, CS_ETMV4_TRCTRACEIDR, /* RO, taken from sysFS */ CS_ETMV4_TRCIDR0, CS_ETMV4_TRCIDR1, CS_ETMV4_TRCIDR2, CS_ETMV4_TRCIDR8, CS_ETMV4_TRCAUTHSTATUS, CS_ETMV4_PRIV_MAX, }; #define KiB(x) ((x) * 1024) #define MiB(x) ((x) * 1024 * 1024) #define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_0_MAX * sizeof(u64)) static const u64 __perf_cs_etmv3_magic = 0x3030303030303030ULL; static const u64 __perf_cs_etmv4_magic = 0x4040404040404040ULL; #define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64)) #define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64)) #endif /vlan_mvrp.c?h=nds-private-remove&id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>commitdiff
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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-30 19:27:10 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-31 09:13:49 -0500
commit79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch)
tree370efda701f03cccf21e02bb1fdd3b852547d75c /net/8021q/vlan_mvrp.c
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'net/8021q/vlan_mvrp.c')