lkml.org 
[lkml]   [2007]   [Nov]   [19]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: SCSI breakage on non-cache coherent architectures
FromBenjamin Herrenschmidt <>
DateTue, 20 Nov 2007 06:55:16 +1100
> I'd like to be rid of it inside the command for various reasons:  every
> command has one of these, and they're expensive in the allocation (at 96
> bytes).  There's no reason we have to allocate and free that amount of
> space with every command.  In theory, the number of these is bounded at
> the queue depth, in practice, there's usually only one, and this DMA
> alignment issue does requires most drivers to double copy.

Do you have a plan for short term here ? I'd like something fixed
for .25, so I may have to introduce a __dma_aligned macro of some sort
to deal with that in the meantime...

Ben.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-11-19 20:59    [from the cache]
©2003-2008