Hi, I've got a strange dma error on my cavium cn56xx board. ...... dma_map_single: Warning: Mapping memory address that might conflict with devices 0xfbb8f000-0xfbb8ffff dma_map_single: Warning: Mapping memory address that might conflict with devices 0xfb2ef000-0xfb2f0fff dma_map_single: Warning: Mapping memory address that might conflict with devices 0xfb3de000-0xfb3defff dma_map_single: Warning: Mapping memory address that might conflict with devices 0xfb3dd000-0xfb3ddfff dma_map_single: Warning: Mapping memory address that might conflict with devices 0xfac28000-0xfac29fff dma_map_single: Warning: Mapping memory address that might conflict with devices 0xfad1a000-0xfad1bfff ..... this error appeared when I plugged 4G or 8G ram on the board, if there is only 2G ram on the board, the error never happened. an adaptec 3405 pci-e raid card is plugged on the board, and a harddisk attached. the program i am running is a postgresql server with more than 20 million record, so do a count(*) will let postgresql consume almost all of the available memory. while there is 4G ram, the 'free' command reported that the free memory is below 18M. then the error kept printing on the console for a while, then kernel panic. the warning message is come from arch/mips/cavium-octeon/dma-octeon.c http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=arch/mips/cavium-octeon/dma-octeon.c;h=be531ec1f2064b590b58dfe8b4db4f5534999bab;hb=HEAD i tried several raid card from different producer, including LSI and Adaptec. the same error always happened while there are more than or equal to 4G memory on the board. Would you please give some advice on this issue? any help will be appreciated. Thanks. Zhuang Yuyao
