Re: raw/block device disc troughput

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Thu, May 24, 2012 at 05:31:43PM +0000, Eduardo Horvath wrote:
> 
> With large transfers (larger than MAXPHYS) the writes are split up into 
> MAXPHYS chunks and the disk handles them in parallel, hence the 
> performance increase even beyond MAXPHYS.

Is this actually true?  For requests from userspace via the raw device,
does physio actually issue the smaller chunks in parallel?

Thor