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(parent: e8165db) | patch
ring-buffer: check for swapped buffers in start of committing
authorSteven Rostedt <srostedt@redhat.com>
Fri, 4 Sep 2009 18:11:34 +0000 (14:11 -0400)
committerSteven Rostedt <rostedt@goodmis.org>
Fri, 4 Sep 2009 23:38:42 +0000 (19:38 -0400)
commit62f0b3eb5cb58931a02ee4e599e19c80a171e351
tree344b3b8f55e6162f7fa08316aa6fde333b304c04tree | snapshot (tar.gz zip)
parente8165dbb03ed04d798163ee512074b9a9466a9c8commit | diff
ring-buffer: check for swapped buffers in start of committing

Because the irqsoff tracer can swap an internal CPU buffer, it is possible
that a swap happens between the start of the write and before the committing
bit is set (the committing bit will disable swapping).

This patch adds a check for this and will fail the write if it detects it.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/ring_buffer.c diff | blob | blame | history
Motorola kernel-slsi