On Wed, 6 Feb 2008 17:32:22 +0100 "Harald Arnesen" <[EMAIL PROTECTED]> wrote:
> Photo of screen attached (no serial terminal, and alas, no decent > tripod either). Thanks, but you've disabled so many debug options that the trace isn't very useful. > git-bisect gives me this: > > 6b7b651055221127304a4e373ee9b762398d54d7 is first bad commit > commit 6b7b651055221127304a4e373ee9b762398d54d7 > Author: FUJITA Tomonori <[EMAIL PROTECTED]> > Date: Mon Feb 4 22:27:55 2008 -0800 > > iommu sg merging: add device_dma_parameters structure > > IOMMUs merges scatter/gather segments without considering a low level > driver's restrictions. The problem is that IOMMUs can't access to the > limitations because they are in request_queue. > > This patchset introduces a new structure, device_dma_parameters, > including dma information. A pointer to device_dma_parameters is added > to struct device. The bus specific structures (like pci_dev) includes > device_dma_parameters. Low level drivers can use dma_set_max_seg_size > to tell IOMMUs about the restrictions. > > We can move more dma stuff in struct device (like dma_mask) to struct > device_dma_parameters later (needs some cleanups before that). > > This includes patches for all the IOMMUs that could merge sg (x86_64, > ppc, IA64, alpha, sparc64, and parisc) though only the ppc patch was > tested. The patches for other IOMMUs are only compile tested. > > $ gcc -v > Using built-in specs. > Target: i686-pc-linux-gnu > Configured with: ../configure --prefix=/opt/gcc > Thread model: posix > gcc version 4.2.3 > > Config: > > ... > > # CONFIG_DEBUG_BUGVERBOSE is not set > This one really should be enabled at all times, please. Can you please set it and retry? -- 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/
