mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: "Iram Shahzad" <iram.shahzad@jp.fujitsu.com>
To: <linux-kernel@vger.kernel.org>
Subject: FUNCTION_TRACER: can it be used to trace early bootup functions
Date: Mon, 24 May 2010 15:55:20 +0900	[thread overview]
Message-ID: <06EE497F774E482693005209CB740D6A@rainbow> (raw)

Hi

I would like to know whether the Kernel Function Tracer
(kernel/trace/trace_functions) be used to trace early kernel
bootup functions starting from start_kernel?
My arch is ARM, by the way.

I have done some trials but it doesn't seem to trace early
bootup functions. I even made it the default tracer replacing
the nop tracer, but still it doesn't give me trace from
start_kernel.

Looking at the source code, it seems to me that it starts
recording data only after its own initialization. So does it
mean that by design it does not support early tracing?

Please CC me in the reply.

Thanks in advance
Iram



             reply	other threads:[~2010-05-24  6:53 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-24  6:55 Iram Shahzad [this message]
2010-05-24 23:32 ` Tim Bird
2010-05-25  0:58   ` Iram Shahzad
2010-05-25  1:55 ` Steven Rostedt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=06EE497F774E482693005209CB740D6A@rainbow \
    --to=iram.shahzad@jp.fujitsu.com \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®