tracing: Erase irqsoff trace with empty write

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One convenient way to erase trace is "echo > trace". However, this
is currently broken if the current tracer is irqsoff tracer. This
is because irqsoff tracer use max_buffer as the default trace
buffer.

Set the max_buffer as the one to be cleared when it's the trace
buffer currently in use.

Link: http://lkml.kernel.org/r/1505754215-29411-1-git-send-email-byan@nvidia.com

Cc: <mingo@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 4acd4d00f ("tracing: give easy way to clear trace buffer")
Signed-off-by: Bo Yan <byan@nvidia.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

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This commit is contained in:

Bo Yan 2017-09-18 10:03:35 -07:00 • committed by Steven Rostedt (VMware)

parent 170b3b1050

commit 8dd33bcb70

1 changed files with 8 additions and 2 deletions

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kernel/trace/trace.c

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