Date: Fri, 18 May 2007 13:53:00 +0400 From: Dmitry Marakasov <amdmi3@amdmi3.ru> To: Bruce Evans <bde@optusnet.com.au> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, Peter Wemm <peter@FreeBSD.org> Subject: Re: cvs commit: src/sys/kern vfs_vnops.c Message-ID: <20070518095300.GA1288@hades.panopticon> In-Reply-To: <20070518025640.Q39238@delplex.bde.org> References: <200705171531.l4HFVEdX083991@repoman.freebsd.org> <20070518025640.Q39238@delplex.bde.org>
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* Bruce Evans (bde@optusnet.com.au) wrote: > > peter 2007-05-17 15:31:14 UTC > > > > FreeBSD src repository > > > > Modified files: > > sys/kern vfs_vnops.c > > Log: > > Eliminate a micro-optimization that hasn't had any effect for 15+ years. > > > > Revision Changes Path > > 1.249 +0 -5 src/sys/kern/vfs_vnops.c > Since it was only implemented 11.5 years ago (in rev.1.18), it certainly > had no effect 15+ years ago, but it probably had an effect later than 11.5 > years ago. I think it refers more to gcc capability to compile var/CONST expression where CONST is 2^n into bit shift instruction instead of division. Which is more important, has this capability been confirmed? -- Best regards, Dmitry Marakasov mailto:amdmi3@amdmi3.ru
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