Re: [RFC][PATCH] ftrace interface for blktrace

From: Ingo Molnar
Date: Sat Jan 17 2009 - 14:09:43 EST

* Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote:

> Hi Jens,
> The patch below adds a ftrace interface for blktrace, allowing
> people to use it without any required userspace tools, using sysfs to
> setup the act_mask, pid, start_lba, end_lba.

Very nice patch!

Jens, i'm wondering what's your take on this direction is. I think the
consolidation effect is great and the built-in IO tracing capabilities are
very nice.

We can still get the raw events too and do user-space post-processing,
when that is desired - so this does not limit anything that blktrace was
able to do before - it only extends on it.

Is there any particular blktrace feature you can think of that is not
present in the blktrace ftrace plugin?

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