linux-kernel - Re: [PATCH 2/2] perf top: Properly notify the user that vmlinux is missing

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Message-Id: <20100315.115526.52182155.davem@davemloft.net>
Date:	Mon, 15 Mar 2010 11:55:26 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	acme@...radead.org
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org, acme@...hat.com,
	fweisbec@...il.com, efault@....de, a.p.zijlstra@...llo.nl,
	paulus@...ba.org
Subject: Re: [PATCH 2/2] perf top: Properly notify the user that vmlinux is
 missing

From: Arnaldo Carvalho de Melo <acme@...radead.org>
Date: Mon, 15 Mar 2010 11:46:58 -0300

> [root@...pio linux-2.6-tip]# perf top -s n_tty_write > /tmp/bla
> objdump: '[kernel.kallsyms]': No such file
> 
> Now this is what the user gets:
> 
> [root@...pio linux-2.6-tip]# perf top -s n_tty_write
> Can't annotate n_tty_write: No vmlinux file was found in the path:
> [0] vmlinux
> [1] /boot/vmlinux
> [2] /boot/vmlinux-2.6.33-rc5
> [3] /lib/modules/2.6.33-rc5/build/vmlinux
> [4] /usr/lib/debug/lib/modules/2.6.33-rc5/vmlinux
> [root@...pio linux-2.6-tip]#

Arnaldo, if perf top can use the kallsyms to do it's normal task, why
can't it use that for symbol annotations too?  Isn't there enough
information available?

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