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authorPekka Paalanen <pq@iki.fi>2008-11-23 21:24:30 +0200
committerIngo Molnar <mingo@elte.hu>2008-11-23 20:33:23 +0100
commit7ee1768ddb3075ae3a0801cc2d0ea4195530a7db (patch)
tree403dea91103838cbe56bca586a8f41a470e7a1e4 /Documentation
parent522a110b42b306d696cf84e34c677ed0e7080194 (diff)
x86, mmiotrace: fix buffer overrun detection
Impact: fix mmiotrace overrun tracing When ftrace framework moved to use the ring buffer facility, the buffer overrun detection was broken after 2.6.27 by commit | commit 3928a8a2d98081d1bc3c0a84a2d70e29b90ecf1c | Author: Steven Rostedt <rostedt@goodmis.org> | Date: Mon Sep 29 23:02:41 2008 -0400 | | ftrace: make work with new ring buffer | | This patch ports ftrace over to the new ring buffer. The detection is now fixed by using the ring buffer API. When mmiotrace detects a buffer overrun, it will report the number of lost events. People reading an mmiotrace log must know if something was missed, otherwise the data may not make sense. Signed-off-by: Pekka Paalanen <pq@iki.fi> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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