From: Lai Jiangshan Date: Fri, 24 Apr 2009 03:27:05 +0000 (+0800) Subject: ring_buffer: compressed event header X-Git-Tag: v2.6.31-rc1~401^2~114 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=334d4169a6592d3fcd863bbe822a8f6985ffa9af;p=pandora-kernel.git 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 LKML-Reference: <49F13189.3090000@cn.fujitsu.com> Signed-off-by: Steven Rostedt --- Reading git-diff-tree failed