Date: Fri, 26 Oct 2007 22:45:53 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Alexey Dokuchaev <danfe@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/geom geom_io.c Message-ID: <20071026204553.GA4241@garage.freebsd.pl> In-Reply-To: <20071026155703.GC7312@FreeBSD.org> References: <200710260655.l9Q6t0UW080765@repoman.freebsd.org> <20071026155703.GC7312@FreeBSD.org>
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[-- Attachment #1 --] 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@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFHIlIBForvXbEpPzQRAlteAKDHoxF3+Jvf4oLkLxM3x9bAvJbH6wCfdeGv 7PPHMdWXOk6cJokAgTU91qs= =4M2c -----END PGP SIGNATURE-----
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