cvs commit: src/sys/geom geom_io.c

[Pawel Jakub Dawidek]

On Fri, Oct 26, 2007 at 03:57:03PM +0000, Alexey Dokuchaev wrote:
> On Fri, Oct 26, 2007 at 06:55:00AM +0000, Pawel Jakub Dawidek wrote:
> > pjd         2007-10-26 06:55:00 UTC
> > 
> >   FreeBSD src repository
> > 
> >   Modified files:
> >     sys/geom             geom_io.c 
> >   Log:
> >   Save stack only when KTR_GEOM is both compiled into the kernel and enabled
> >   in debug.ktr.mask. Because saving stack is very expensive, it's better only
> >   to do it when one really wants to.
> 
> Do you by chance have benchmark results?  I'd like to know what impact
> does it cause, unless I'm asking too much.  :-)

It can make your system to crawl when you do a lot of I/Os.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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