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Date: Fri, 15 Feb 2013 15:12:00 +0100
From: Gary Jennejohn <gljennjohn@googlemail.com>
To: Dag-Erling =?ISO-8859-1?Q?Sm=F8rgrav?= <des@des.no>
Subject: Re: Unmapped I/O
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 <20130214194731.GK2522@kib.kiev.ua> <86621trc50.fsf@ds4.des.no>
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Cc: Konstantin Belousov <kostikbel@gmail.com>, arch@freebsd.org
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On Fri, 15 Feb 2013 13:32:11 +0100
Dag-Erling Smørgrav <des@des.no> wrote:

> Konstantin Belousov <kostikbel@gmail.com> writes:
> > I consider the current patch ready to be committed into the HEAD.
> > Some elements of the design were discussed with Jeff Roberson.  The
> > patch was tested by Peter Holm, a backport to stable/9 got load
> > testing by Scott Long.  I see an ~30% reduction in the system time on
> > reading large files over UFS/ahci on the 4-core HTT machine.
> 
> That sounds very nice indeed.  Have you observed a similar reduction in
> buildworld times?
> 

I applied the patch and am currently running with it.

Had to fix a fatal error in subr_bus_dma.c - "error may be used
unitialized" or something to that effect.  I don't have the patched
source any longer, but I think it was at line 131.

I started a build world with -j6 but unfortunately it broke off with an error
which is no longer visible in the output.

-- 
Gary Jennejohn