Re: [PATCH 2.4.x] prevent emulated SCSI hosts from wasting DMA memory

[Dan Aloni]

On Wed, Nov 30, 2005 at 07:33:47PM +0000, Luke-Jr wrote:
> On Wednesday 30 November 2005 17:15, Dan Aloni wrote:
> > Emulated scsi hosts don't do DMA, so don't unnecessarily increase
> > the SCSI DMA pool.
> 
> They don't? Recently I learned(?) that apparently using hdparm -d on the 
> old /dev/hdX device still worked/applied when using ide-scsi... or do 
> "emulated scsi hosts" refer to something else?

Actually by 'do DMA' I meant use the scsi_malloc() interface - which 
is mostly used by low level drivers. The IDE drivers allocate their
DMA memory outside the SCSI layer. iSCSI hosts for instance, don't 
need to cause unnecessary DMA allocations.

-- 
Dan Aloni
da-x@xxxxxxxxxxxxx, da-x@xxxxxxxxxxx, da-x@xxxxxxx
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