ring-buffer: Use sync sched protection on ring buffer resizing

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There was a comment in the ring buffer code that says the calling
layers should prevent tracing or reading of the ring buffer while
resizing. I have discovered that the tracers do not honor this
arrangement.

This patch moves the disabling and synchronizing the ring buffer to
a higher layer during resizing. This guarantees that no writes
are occurring while the resize takes place.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Steven Rostedt 2009-12-10 22:54:27 -05:00 • committed by Steven Rostedt

parent d954fbf0ff

commit 184210154b

1 changed files with 9 additions and 16 deletions

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kernel/trace/ring_buffer.c

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