Messages in this thread |  | | | From | (Alan Cox) | | Subject | Re: SCSI tape blocks > 128k ? | | Date | Tue, 25 Aug 1998 17:23:17 +0100 (BST) |
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> http://samba.anu.edu.au/cgi-bin/linux-patches/incoming?id=267 > > The patch implements the bigbuffer support required for this use, and > patches "sg" to actually use it. A two-line patch will allow st to > also use this......
Its a workable answer, but not the right one. The right one is to propogate the use of scatter gather better and eventually (2.3.x I hope) DMA to user pages. Modern SCSI controllers dont need 1Mbyte of linear memory for this. And non DMA old ones are generally sufficiently dumb you can implement scatter gather in the cpu driven byte copy routines
Alan
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