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SubjectRe: SCSI tape blocks > 128k ?
Date
> 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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