On Fri, Oct 10, 2008 at 8:48 AM, Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> wrote: > On Thursday, October 9, 2008 7:40 pm FUJITA Tomonori wrote: >> On Thu, 9 Oct 2008 15:18:37 -0600 >> >> Grant Grundler <grundler@xxxxxxxxxxxxxxxx> wrote: >> > On Wed, Oct 08, 2008 at 04:02:23PM -0700, Yinghai Lu wrote: >> > > so can find out what is DMA mask is used for pci devices in addition to >> > > default setting. >> > >> > I like the idea. I don't like the additional boot time output. >> > >> > But I'm thinking this could be an option to lspci. >> > lspci already knows about the /sys tree. Can PCI export the two masks >> > (dma_mask and dma_consistent_mask) and something like "lspci -td" >> > would dump those in a nice way? >> > >> > Anyone else agree? >> >> Agreed. >> >> dma_mask and dma_consistent_mask is not useful for the >> majority. Printing them at boot time doesn't make sense for me. >> >> Adding under sysfs and using lspci sounds reasonable if we really need >> these information. > > Another option would be to add a 'warn_dma_mask=0xxxxxxxxx' boot option that > would trigger in the actual DMA mask setting routines. It would let you > choose the mask you'd like to see warnings about. Yinghai? > another command line parameter for debug? anyway looking at dma_mask print out is interesting..., some uses 39, and some use 44bits... YH -- 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
