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authorLai Jiangshan <laijs@cn.fujitsu.com>2009-04-24 11:27:05 +0800
committerSteven Rostedt <rostedt@goodmis.org>2009-04-24 00:08:38 -0400
commit334d4169a6592d3fcd863bbe822a8f6985ffa9af (patch)
tree3ac9c038304eaa69b06d9cac735fd62a8d6c47b3 /include/trace
parentc2518c4366f087ebc10b3919cb2461bbe4f42d0c (diff)
ring_buffer: compressed event header
RB_MAX_SMALL_DATA = 28bytes is too small for most tracers, it wastes an 'u32' to save the actually length for events which data size > 28. This fix uses compressed event header and enlarges RB_MAX_SMALL_DATA. [ Impact: saves about 0%-12.5%(depends on tracer) memory in ring_buffer ] Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <49F13189.3090000@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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