Date: Tue, 3 Jul 2007 14:27:51 -0700 (PDT) From: Jeff Roberson <jroberson@chesapeake.net> To: Jeff Roberson <jeff@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern kern_descrip.c Message-ID: <20070703142714.F552@10.0.0.1> In-Reply-To: <200707032126.l63LQ7ea027929@repoman.freebsd.org> References: <200707032126.l63LQ7ea027929@repoman.freebsd.org>
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For the curious, these last two patches make a substantial improvement to mysql write performance on my 8way opteron: http://people.freebsd.org/~jeff/mysqlwrite.png The green line is without and the blue line is with. Thanks, Jeff On Tue, 3 Jul 2007, Jeff Roberson wrote: > jeff 2007-07-03 21:26:07 UTC > > FreeBSD src repository > > Modified files: > sys/kern kern_descrip.c > Log: > - Use explicit locking in the various fcntl case statements so that we > can acquire shared filedescriptor locks in the appropriate cases. > - Remove Giant from calls that issue ioctls. The ioctl path has been > mpsafe for some time now. > - Only acquire giant for VOP_ADVLOCK when the filesystem requires giant. > advlock is now mpsafe. > > Reviewed by: rwatson > Approved by: re > > Revision Changes Path > 1.312 +99 -64 src/sys/kern/kern_descrip.c >
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