Subject: Re: maximum size of 8KB in copyin\out
To: Maen Suleiman <email@example.com>
From: Matt Thomas <firstname.lastname@example.org>
Date: 03/09/2007 15:57:59
Maen Suleiman wrote:
> We are implmenting copyin\out using DMA engine, and we have noticed
> that the maximum buffer size is 8KB (for example when using 'dd
> if=/dev/sd0c of=/dev/null bs=131072' ) , Is there a reason for this?
> can this size be increased ?
Why are you the buffered device instead of the raw device? Try the
raw device (/dev/rsd0c) and you'll vastly different behavior.