Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops | KernelTrap

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops

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From: Andi Kleen <andi@...>

To: David P. Reed <dpreed@...>

Cc: Andi Kleen <andi@...>, <linux-kernel@...>, Thomas Gleixner <tglx@...>, Ingo Molnar <mingo@...>, H. Peter Anvin <hpa@...>

Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops

Date: Friday, December 7, 2007 - 10:54 am

> My machine in question, for example, needs no waiting within CMOS_READs 
quoted text> at all.   And I doubt any other chip/device needs waiting that isn't 

I don't know about CMOS, but there were definitely some not too ancient
systems (let's say not more than 10 years) who required IO delays in the
floppy driver and the 8253/8259. But on those the jumps are already
far too fast.

-Andi
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Messages in current thread:

RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64..., David P. Reed, (Thu Dec 6, 6:38 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Fri Dec 7, 6:44 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Fri Dec 7, 12:04 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Sun Dec 9, 8:54 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Sun Dec 9, 12:59 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Sun Dec 9, 5:25 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Mon Dec 10, 12:17 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Krzysztof Halasa, (Mon Dec 10, 7:30 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David Newall, (Mon Dec 10, 9:10 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., H. Peter Anvin, (Mon Dec 10, 9:25 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 2:54 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., H. Peter Anvin, (Tue Dec 11, 1:01 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David Newall, (Mon Dec 10, 9:42 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Tue Dec 11, 9:14 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Tue Dec 11, 9:32 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Tue Dec 11, 9:47 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Tue Dec 11, 9:50 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Ingo Molnar, (Fri Dec 14, 9:33 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Paul Rolland, (Tue Dec 11, 3:40 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 5:50 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David Newall, (Tue Dec 11, 8:08 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 9:16 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David Newall, (Tue Dec 11, 9:50 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., linux-os (Dick Johnson), (Tue Dec 11, 11:41 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Tue Dec 11, 12:30 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 12:50 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Tue Dec 11, 3:16 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 4:00 pm)

More info on port 80 symptoms on MCP51 machine., David P. Reed, (Wed Dec 12, 4:07 pm)

Re: More info on port 80 symptoms on MCP51 machine., Rene Herman, (Wed Dec 12, 4:26 pm)

Re: More info on port 80 symptoms on MCP51 machine., Rene Herman, (Wed Dec 12, 4:58 pm)

Re: More info on port 80 symptoms on MCP51 machine., H. Peter Anvin, (Wed Dec 12, 5:05 pm)

Re: More info on port 80 symptoms on MCP51 machine., Chuck Ebbert, (Fri Dec 14, 6:05 pm)

Re: More info on port 80 symptoms on MCP51 machine., Rene Herman, (Sat Dec 15, 3:22 am)

Re: More info on port 80 symptoms on MCP51 machine., Alan Cox, (Wed Dec 12, 5:01 pm)

Re: More info on port 80 symptoms on MCP51 machine., H. Peter Anvin, (Wed Dec 12, 5:12 pm)

RE: More info on port 80 symptoms on MCP51 machine., Allen Martin, (Sat Dec 15, 6:34 pm)

Re: More info on port 80 symptoms on MCP51 machine., H. Peter Anvin, (Sat Dec 15, 6:46 pm)

Re: More info on port 80 symptoms on MCP51 machine., Alan Cox, (Wed Dec 12, 5:29 pm)

Re: More info on port 80 symptoms on MCP51 machine., David P. Reed, (Wed Dec 12, 4:37 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 4:00 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 3:59 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 3:59 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Tue Dec 11, 1:00 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 1:04 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Tue Dec 11, 3:18 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 1:27 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Tue Dec 11, 10:25 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David Newall, (Wed Dec 12, 6:18 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Wed Dec 12, 7:00 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Thu Dec 13, 9:13 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Thu Dec 13, 9:21 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Thu Dec 13, 9:50 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Fri Dec 14, 11:16 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 10:14 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Paul Rolland, (Tue Dec 11, 9:32 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 10:15 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 11:28 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., John Stoffel, (Tue Dec 11, 12:32 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 12:40 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Paul Rolland, (Tue Dec 11, 11:37 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 11:53 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Tue Dec 11, 12:58 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Tue Dec 11, 1:32 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Tue Dec 11, 3:19 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., linux-os (Dick Johnson), (Tue Dec 11, 4:27 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Tue Dec 11, 7:56 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., linux-os (Dick Johnson), (Wed Dec 12, 9:11 am)

Attitude problems., David P. Reed, (Wed Dec 12, 3:42 pm)

Re: Attitude problems., linux-os (Dick Johnson), (Wed Dec 12, 4:31 pm)

Re: Attitude problems., linux-os (Dick Johnson), (Fri Dec 14, 12:01 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Wed Dec 12, 12:12 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Ingo Molnar, (Fri Dec 14, 10:33 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 4:34 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Tue Dec 11, 5:03 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Tue Dec 11, 4:16 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Tue Dec 11, 3:36 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., H. Peter Anvin, (Tue Dec 11, 1:05 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Tue Dec 11, 1:01 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., H. Peter Anvin, (Mon Dec 10, 9:51 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., H. Peter Anvin, (Mon Dec 10, 9:46 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Ondrej Zary, (Mon Dec 10, 2:02 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Mon Dec 10, 8:08 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Sun Dec 9, 6:29 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Sun Dec 9, 7:22 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Mon Dec 10, 8:02 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Ondrej Zary, (Sun Dec 9, 11:54 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Dr. David Alan Gilbert, (Sun Dec 9, 9:41 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Sat Dec 8, 3:25 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Lennart Sorensen, (Tue Dec 11, 11:14 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Sun Dec 9, 9:22 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Sun Dec 9, 1:04 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Sat Dec 8, 4:26 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., H. Peter Anvin, (Tue Dec 11, 1:58 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Sat Dec 8, 3:50 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Sat Dec 8, 4:47 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Sat Dec 8, 5:04 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Fri Dec 7, 12:31 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Fri Dec 7, 1:19 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Fri Dec 7, 2:45 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Fri Dec 7, 2:42 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Fri Dec 7, 3:25 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Fri Dec 7, 5:45 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., David P. Reed, (Fri Dec 7, 10:50 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Pavel Machek, (Wed Dec 5, 7:10 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Fri Dec 7, 8:21 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Andi Kleen, (Fri Dec 7, 10:54 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., H. Peter Anvin, (Tue Dec 11, 1:53 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Fri Dec 7, 11:43 am)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Rene Herman, (Fri Dec 7, 12:28 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., H. Peter Anvin, (Mon Dec 10, 8:31 pm)

Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern A..., Alan Cox, (Thu Dec 6, 8:15 pm)

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