On Tuesday 06 January 2009, Alan Cox wrote: > > Judging on what you have posted, IDE driver would not probably give > > any speed improvement, only soewhat lesser memory footprint... > > Except he is also using USB storage so the shared stack with the libata > code is already loaded ... Doesn't really matter because libata itself is quite heavy: $ size drivers/ata/built-in.o drivers/ide/built-in.o text data bss dec hex filename 84100 6584 4196 94880 172a0 drivers/ata/built-in.o 50198 1032 240 51470 c90e drivers/ide/built-in.o [ I'm pretty sure that runtime memory footprint is also lower for IDE. ] Possible additional gains if usb-storage wouldn't be needed: $ size drivers/scsi/built-in.o text data bss dec hex filename 61136 4660 532 66328 10318 drivers/scsi/built-in.o This is with Linus' tree from today plus "IDE updates part 3" pull request posted today + CS5536 IDE host driver. Enabled config options: * libata CONFIG_ATA=y CONFIG_ATA_ACPI=y CONFIG_ATA_SFF=y CONFIG_PATA_CS5536=y * IDE CONFIG_IDE_GD=y CONFIG_IDE_GD_ATA=y CONFIG_BLK_DEV_IDEACPI=y CONFIG_IDE_TASK_IOCTL=y CONFIG_BLK_DEV_IDEDMA_SFF=y CONFIG_BLK_DEV_IDEPCI=y CONFIG_BLK_DEV_IDEDMA_PCI=y CONFIG_BLK_DEV_CS5536=y CONFIG_BLK_DEV_IDEDMA=y * SCSI CONFIG_SCSI=y CONFIG_SCSI_DMA=y CONFIG_BLK_DEV_SD=y CONFIG_SCSI_MULTI_LUN=y CONFIG_SCSI_WAIT_SCAN=m -- Thanks, Bart -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
