Linus Torvalds 78baab7aa8 A feature was added in 4.3 that allowed users to filter trace points on ... a tasks "comm" field. But this prevented filtering on a comm field that is within a trace event (like sched_migrate_task). When trying to filter on when a program migrated, this change prevented the filtering of the sched_migrate_task. To fix this, the event fields are examined first, and then the extra fields like "comm" and "cpu" are examined. Also, instead of testing to assign the comm filter function based on the field's name, the generic comm field is given a new filter type (FILTER_COMM). When this field is used to filter the type is checked. The same is done for the cpu filter field. Two new special filter types are added: "COMM" and "CPU". This allows users to still filter the tasks comm for events that have "comm" as one of their fields, in cases that users would like to filter sched_migrate_task on the comm of the task that called the event, and not the comm of the task that is being migrated. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJW2argAAoJEKKk/i67LK/8b78H/32nYPizDIsK/p2bL1mgbtMl vrkcfb+maPOC7cjB+CdQmyV4EIVpSn06XFouYghGprdoVocVyBuIflxn0j3Gbymy zLCg8lR70KTATTqst1wsWMbnh+UvAKNEiXj8jf2qcK2xhgalXMDwsTC4+LDlLugu YAx89lmsjK1YpP/wIzMww2jQG+07Nhm9gHWXF2MC3egZ+sgYxARnfds0yTcGgS8o dc/yJGZDCI44JMDNThcCFxNvsmoTa9tpm+JNe2YTht6KCympa+Ht9Jj9MMlD06cq M5CqMQlok+mrVsW5LbJPCk1u83ynr6d/PcPQuT2nykRx8bGvKjA7AKMPaxw1Jz4= =ixBz -----END PGP SIGNATURE----- Merge tag 'trace-fixes-v4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fix from Steven Rostedt: "A feature was added in 4.3 that allowed users to filter trace points on a tasks "comm" field. But this prevented filtering on a comm field that is within a trace event (like sched_migrate_task). When trying to filter on when a program migrated, this change prevented the filtering of the sched_migrate_task. To fix this, the event fields are examined first, and then the extra fields like "comm" and "cpu" are examined. Also, instead of testing to assign the comm filter function based on the field's name, the generic comm field is given a new filter type (FILTER_COMM). When this field is used to filter the type is checked. The same is done for the cpu filter field. Two new special filter types are added: "COMM" and "CPU". This allows users to still filter the tasks comm for events that have "comm" as one of their fields, in cases that users would like to filter sched_migrate_task on the comm of the task that called the event, and not the comm of the task that is being migrated" * tag 'trace-fixes-v4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Do not have 'comm' filter override event 'comm' field		2016-03-04 16:57:04 -08:00
..
blktrace.c
bpf_trace.c	perf/bpf: Convert perf_event_array to use struct file	2016-01-29 08:35:25 +01:00
ftrace.c	ftrace/module: remove ftrace module notifier	2016-02-17 22:14:06 +01:00
Kconfig
Makefile
power-traces.c
ring_buffer.c
ring_buffer_benchmark.c
rpm-traces.c
trace.c
trace.h
trace_benchmark.c
trace_benchmark.h
trace_branch.c
trace_clock.c
trace_entries.h
trace_event_perf.c
trace_events.c	tracing: Do not have 'comm' filter override event 'comm' field	2016-03-04 09:57:10 -05:00
trace_events_filter.c	tracing: Do not have 'comm' filter override event 'comm' field	2016-03-04 09:57:10 -05:00
trace_events_filter_test.h
trace_events_trigger.c
trace_export.c
trace_functions.c
trace_functions_graph.c
trace_irqsoff.c
trace_kdb.c
trace_kprobe.c
trace_mmiotrace.c
trace_nop.c
trace_output.c
trace_output.h
trace_printk.c
trace_probe.c
trace_probe.h
trace_sched_switch.c
trace_sched_wakeup.c
trace_selftest.c
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c	tracing, kasan: Silence Kasan warning in check_stack of stack_tracer	2016-02-19 12:36:44 -05:00
trace_stat.c
trace_stat.h
trace_syscalls.c
trace_uprobe.c