Re: Out of ptys??

Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 21 Aug 1998 21:21:55 +0100 (BST)


> >Sounds like the problem is that current kernels don't read
> >SGI-formatted tapes (why is that)? Let's fix the real problem.
>
> The default SGI tape blocking factor is either 256k or 512k.
>
> st in 2.0.x wants to use kmalloc() for that buffer.

Basically its partly the old "cant DMA to user space" problem, and much
more the fact the rather geriatric scsi layer code doesn't make use of
scatter gather to go around the block size problems. Thats not a small
change

Alan

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