Re: [GIT PULL] x86/cpu changes for v2.6.34

From: H. Peter Anvin
Date: Mon Mar 01 2010 - 17:26:12 EST

On 03/01/2010 11:42 AM, Steven Rostedt wrote:
> As Frederic has said you can use 'ftrace=function_graph' on the kernel
> command line. It will be initialized in early_initcall (which I believe
> is before CPUs are set up. Then add a tracing_off() after the trouble
> code. You can make the trace buffers bigger with the kernel command
> line:
> trace_buf_size=10000000
> The above will make the trace buffer 10Meg per CPU. Unlike the
> "buffer_size_kb" file, this number is in bytes, even though it will
> round to the nearest page. (I probably should make this into kb, and
> rename it to trace_buf_size_kb, and deprecate trace_buf_size).

Memory sizes specified on the kernel command line should generally be in
units of bytes, but accepting suffixes.

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