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The problem is that the profiler only initializes the online CPUs, and not possible CPUs. This causes issues if the user takes CPUs online or offline while the profiler is running. If we online a CPU after starting the profiler, we lose all the trace information on the CPU going online. If we offline a CPU after running a test and start a new test, it will not clear the old data from that CPU. This bug causes incorrect data to be reported to the user if they online or offline CPUs during the profiling. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) iQEcBAABAgAGBQJSsNBHAAoJEKQekfcNnQGuKP8H/2mol/d7z2vANh7/FeNjTKIN VkRzDEwUIwoaJBsL75EDDXBFx7w8jjAsXyoTrqrvMRV4UNcsfm46mohQTPAmK39y muqodL1VnVXdKrUmtw/1nL7yDi2KltQH1UwOgvwXGuUFIq5cuCXNQxNK9/1fVVVn tIMNz5kEAG3XCwnqP0PgQxWCuA7s+aQR0ijTf4vPf1G3IJujPyG9VhJWcGS3dJTR t8TPyatd9D/S+7/r7iZ9hS8nWpaka3qJfhiWqk16SC9LiUXVA8oFOVMoN7n6Co5E 6r2dNo01WOABlojCxi1t3afUtcV1bUjBnVkiDva5cSc84pQSxe1qRrIpjTmHk00= =MSZs -----END PGP SIGNATURE----- Merge tag 'trace-fixes-v3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull ftrace fix from Steven Rostedt: "This fixes a long standing bug in the ftrace profiler. The problem is that the profiler only initializes the online CPUs, and not possible CPUs. This causes issues if the user takes CPUs online or offline while the profiler is running. If we online a CPU after starting the profiler, we lose all the trace information on the CPU going online. If we offline a CPU after running a test and start a new test, it will not clear the old data from that CPU. This bug causes incorrect data to be reported to the user if they online or offline CPUs during the profiling" * tag 'trace-fixes-v3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ftrace: Initialize the ftrace profiler for each possible cpu |
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| .. | ||
| blktrace.c | ||
| ftrace.c | ||
| Kconfig | ||
| Makefile | ||
| power-traces.c | ||
| ring_buffer_benchmark.c | ||
| ring_buffer.c | ||
| rpm-traces.c | ||
| trace_branch.c | ||
| trace_clock.c | ||
| trace_entries.h | ||
| trace_event_perf.c | ||
| trace_events_filter_test.h | ||
| trace_events_filter.c | ||
| trace_events.c | ||
| trace_export.c | ||
| trace_functions_graph.c | ||
| trace_functions.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_dynamic.c | ||
| trace_selftest.c | ||
| trace_stack.c | ||
| trace_stat.c | ||
| trace_stat.h | ||
| trace_syscalls.c | ||
| trace_uprobe.c | ||
| trace.c | ||
| trace.h | ||