From 250bfd3d8e7e19cb649dd94689f0af2ce3474060 Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Mon, 14 Jan 2013 10:54:11 +0800 Subject: [PATCH] tracing: Fix regression of trace_pipe Commit 0fb9656d "tracing: Make tracing_enabled be equal to tracing_on" changes the behaviour of trace_pipe, ie. it makes trace_pipe return if we've read something and tracing is enabled, and this means that we have to 'cat trace_pipe' again and again while running tests. IMO the right way is if tracing is enabled, we always block and wait for ring buffer, or we may lose what we want since ring buffer's size is limited. Link: http://lkml.kernel.org/r/1358132051-5410-1-git-send-email-bo.li.liu@oracle.com Signed-off-by: Liu Bo Signed-off-by: Steven Rostedt --- Reading git-format-patch failed