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"A month of sundays ago kernel@street-vision.com wrote:" > > > > What functions does a block driver have to implement in order to > > support read/write when it has been opened with O_DIRECT from user > > space. > Remeber that the memory you read/write from must be page aligned (ie > mmap /dev/zero not malloc) and reads and writes must be multiples of the > page size. I think block devices work on 2.4 too, but I forget (otherwise > you can use raw devices). I do believe you are right. Multiples of 4096 seem to work fine. No support needed in the block device driver. Peter - 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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