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Re: [patch 0/2] Immediate Values - jump patching update

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From: H. Peter Anvin <hpa@...>
To: Ingo Molnar <mingo@...>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...>, <akpm@...>, <linux-kernel@...>
Subject: Re: [patch 0/2] Immediate Values - jump patching update
Date: Monday, April 28, 2008 - 5:03 pm

Ingo Molnar wrote:

My objections are higher level, I believe the current code is (a) 
painfully complex, and I'd rather not see it in the kernel, and (b) the 
wrong thing anyway.

Put a 5-byte nop in as the marker, and patch it with a call instruction, 
out of line, to a collector function.

	-hpa
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Messages in current thread:
[patch 0/2] Immediate Values - jump patching update, Mathieu Desnoyers, (Sun Apr 27, 11:34 pm)
Re: [patch 0/2] Immediate Values - jump patching update, H. Peter Anvin, (Mon Apr 28, 1:21 pm)
Re: [patch 0/2] Immediate Values - jump patching update, Ingo Molnar, (Mon Apr 28, 4:25 pm)
Re: [patch 0/2] Immediate Values - jump patching update, H. Peter Anvin, (Mon Apr 28, 5:03 pm)
Re: [patch 0/2] Immediate Values - jump patching update, Ingo Molnar, (Mon Apr 28, 6:11 pm)
Re: [patch 0/2] Immediate Values - jump patching update, H. Peter Anvin, (Mon Apr 28, 6:25 pm)
Re: [patch 0/2] Immediate Values - jump patching update, Ingo Molnar, (Mon Apr 28, 6:44 pm)
Re: [patch 0/2] Immediate Values - jump patching update, H. Peter Anvin, (Mon Apr 28, 7:06 pm)
Re: [patch 0/2] Immediate Values - jump patching update, Mathieu Desnoyers, (Mon Apr 28, 9:46 pm)
Re: [patch 0/2] Immediate Values - jump patching update, H. Peter Anvin, (Mon Apr 28, 10:07 pm)
Re: [patch 0/2] Immediate Values - jump patching update, Mathieu Desnoyers, (Tue Apr 29, 8:18 am)
Re: [patch 0/2] Immediate Values - jump patching update, H. Peter Anvin, (Tue Apr 29, 11:35 am)
Re: [patch 0/2] Immediate Values - jump patching update, Mathieu Desnoyers, (Sun May 4, 10:54 am)
Re: [patch 0/2] Immediate Values - jump patching update, H. Peter Anvin, (Sun May 4, 5:05 pm)
Re: [patch 0/2] Immediate Values - jump patching update, Frank Ch. Eigler, (Mon Apr 28, 8:47 pm)
Re: [patch 0/2] Immediate Values - jump patching update, H. Peter Anvin, (Mon Apr 28, 9:08 pm)
Re: [patch 0/2] Immediate Values - jump patching update, Ingo Molnar, (Tue Apr 29, 8:08 am)
Re: [patch 0/2] Immediate Values - jump patching update, Pavel Machek, (Wed May 14, 10:53 am)
Re: [patch 0/2] Immediate Values - jump patching update, Ingo Molnar, (Mon Apr 28, 8:48 am)
Re: [patch 0/2] Immediate Values - jump patching update, Mathieu Desnoyers, (Mon Apr 28, 10:35 am)