Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



David P. Reed wrote:

Note that I can run the port 80 test once, the second time I get the hard freeze. I didn't try writing to port 70 from userspace - that one's dangerous, but the reading of it was included for a timing typical of a chipset supported device. These are all pretty consistent.

I find the "read" timing from 0x80 verrrrry interesting. The write timeing is also interesting, being faster than an unused port.


Once again: reading from port 0x80 goes to the DMA page device.

	-hpa
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux