John Baldwin wrote:
Author: jhb Date: Tue Oct 21 18:51:55 2008 New Revision: 184135 URL: http://svn.freebsd.org/changeset/base/184135Log: Restore the default maximum segment size for the bus dma tag to 64k as it is in 6.x and 7.x. The typo caused 64k transactions to be unnecessarily split up into two PRD entries. Modified: head/sys/dev/ata/ata-dma.c Modified: head/sys/dev/ata/ata-dma.c ============================================================================== --- head/sys/dev/ata/ata-dma.c Tue Oct 21 18:50:52 2008 (r184134) +++ head/sys/dev/ata/ata-dma.c Tue Oct 21 18:51:55 2008 (r184135) @@ -78,7 +78,7 @@ ata_dmainit(device_t dev) ch->dma.unload = ata_dmaunload; ch->dma.alignment = 2; ch->dma.boundary = 65536; - ch->dma.segsize = 63536; + ch->dma.segsize = 65536; ch->dma.max_iosize = 128 * DEV_BSIZE; ch->dma.max_address = BUS_SPACE_MAXADDR_32BIT; ch->dma.dma_slots = 6;
Not having a multiple-of-512 transfer size is likely more responsible for data corruption than having a transfer size near 64k. Scott _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
