Re: [PATCH 0/4] perf record: Cleanups and mmap-based output

From: Ingo Molnar
Date: Thu Nov 07 2013 - 03:06:25 EST

* David Ahern <dsahern@xxxxxxxxx> wrote:

> I know Jiri is working on cleanups of the output file, but had this
> sitting around for a couple of weeks now. Might as well push it out
> for the next baseline. The cleanups of perf-record can be taken
> independently.
> Ingo: I took a look at leveraging the copy_user_nocache and was not able
> to get it to work. I won't have time to come back to it for a while.
> Given that the mmap output already improves perf-trace a lot I would
> like to get the option into 3.13 and come back to the optimization
> later.

That's OK - your feature is already a big step forward!

1-3 look good to me and 4/4 needs some minor cleanups (see my review


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at