Date: Fri, 13 Feb 2009 14:02:29 -0700 From: Scott Long <scottl@samsco.org> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-current@freebsd.org, freebsd-stable@freebsd.org Subject: Re: HEADS UP: Major CAM performance regression Message-ID: <4995DFE5.1020205@samsco.org> In-Reply-To: <gn3ssi$j1r$1@ger.gmane.org> References: <499551B9.7050805@samsco.org> <gn3ssi$j1r$1@ger.gmane.org>
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Ivan Voras wrote: > Scott Long wrote: > >> I have committed a fix for this problem for FreeBSD 8-CURRENT as of SVN >> revision 188570. FreeBSD 7-STABLE will be updated with the fix in a few >> days once I've gotten confirmation that the fix works and doesn't cause >> any adverse side-effects. Anyone wanting to help in this validation >> effort should apply the attached patch to their kernel source tree and >> recompile. Please contact me directly by email to report if the problem >> is fixed for you. > > I notice that write performance on an ESXi 3.5 hosted system is doubled, > but read performance remains the same (in bonnie++). > On a CISS system there is no significant change. > bonnie is an unreliable tool for measuring performance. Scott
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