Re: [RFC][PATCH] libata ATAPI alignment

Jens Axboe wrote:

On Fri, Jul 29 2005, Jeff Garzik wrote:

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -44,7 +44,7 @@

enum {
	AHCI_PCI_BAR		= 5,
-	AHCI_MAX_SG		= 168, /* hardware max is 64K */
+	AHCI_MAX_SG		= 300, /* hardware max is 64K */
	AHCI_DMA_BOUNDARY	= 0xffffffff,
	AHCI_USE_CLUSTERING	= 0,
	AHCI_CMD_SLOT_SZ	= 32 * 32,

Reasoning? I agree, just wondering... How big is the allocated area now?

168 kept the entire allocated DMA area to 4K.

300 increases that to <I don't care>K.  ;-)

	Jeff


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• References:
  • [RFC][PATCH] libata ATAPI alignment
    • From: Jeff Garzik <[email protected]>
  • Re: [RFC][PATCH] libata ATAPI alignment
    • From: Jens Axboe <[email protected]>

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