linux-kernel - Re: [PATCH 1/3] ftrace: prevent freeing of all failed updates

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Message-ID: <20080610095740.GF27706@elte.hu>
Date:	Tue, 10 Jun 2008 11:57:40 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Abhishek Sagar <sagar.abhishek@...il.com>
Cc:	rostedt@...dmis.org, Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] ftrace: prevent freeing of all failed updates


* Abhishek Sagar <sagar.abhishek@...il.com> wrote:

> Prevent freeing of records which cause problems and correspond to 
> function from core kernel text. A new flag, FTRACE_FL_CONVERTED is 
> used to mark a record as "converted". All other records are patched 
> lazily to NOPs. Failed records now also remain on frace_hash table. 
> Each invocation of ftrace_record_ip now checks whether the traced 
> function has ever been recorded (including past failures) and doesn't 
> re-record it again.

applied to tip/tracing/ftrace, thanks Abhishek.

	Ingo
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