On Wed, 22 Apr 2009 16:52:09 -0600 Andrew Patterson <andrew.patterson@xxxxxx> wrote: > PCI: Add support for turning PCIe ECRC on or off > > Adds support for PCI Express transaction layer end-to-end CRC checking > (ECRC). This patch will enable/disable ECRC checking by > setting/clearing the ECRC Check Enable and/or ECRC Generation Enable > bits for devices that support ECRC. > > The ECRC setting is controlled by the "pci=ecrc=<policy>" command-line > option. If this option is not set or is set to 'bios", the enable and > generation bits are left in whatever state that firmware/BIOS set > them to. The "off" setting turns them off, and the "on" option turns > them on (if the device supports it). > > Turning ECRC on or off can be a data integrity versus performance > tradeoff. In theory, turning it on will catch more data errors, > turning it off means possibly better performance since CRC does not > need to be calculated by the PCIe hardware and packet sizes are > reduced. > > Signed-off-by: Andrew Patterson <andrew.patterson@xxxxxx> > --- > Applied to linux-next, thanks. -- Jesse Barnes, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
