On Wed, Aug 22, 2007 at 05:05:54PM -0700, Luck, Tony wrote: > > Hmm. Must be something else going on then. It should be less than 1MB > > per ioc plus whatever is used for streaming I/O. > > > > | mptbase: Initiating ioc2 bringup | GSI 16 (level, low) -> CPU 2 (0xc418) vector 50 > > | ioc2: LSI53C1030 C0: Capabilities={Initiator} | ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 16 (level, low) -> > > | DMA: Out of SW-IOMMU space for 263200 bytes at device ? | uhci_hcd 0000:00:1d.0: UHCI Host Controller > > | Kernel panic - not syncing: DMA: Memory would be corrupted | uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus n > > I traced the pci_alloc_consistent calls from PrimeIocFifos on my > system. There are two calls for each ioc. The first is for > 266368 bytes, the second for 16320 bytes. > > I wonder why Kamalesh's system wants the slightly different > amount (263200 bytes) from what my system asks for? > > It also looks to be a little unfriendly to swiotlb to ask for > more than 256K at a time (see IO_TLB_SEGSIZE) in swiotlb.c > > -Tony I believe those would vary a bit based on the exact firmware rev and perhaps nvram settings. Also driver settings, but those are presumably the same. jeremy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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