Date: Fri, 9 Feb 2018 21:53:51 +0100 From: Christian Weisgerber <naddy@mips.inka.de> To: Scott Bennett <bennett@sdf.org> Cc: freebsd-questions@freebsd.org Subject: Re: Swap on SSD Message-ID: <20180209205351.GA68122@lorvorc.mips.inka.de> In-Reply-To: <201802081425.w18EPYPg005443@sdf.org> References: <201802081425.w18EPYPg005443@sdf.org>
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Scott Bennett: > >Demand paging was introduced in UNIX 32V and entered the BSD line > > Are you absolutely certain of that? Judging from _A Quarter Century of UNIX_, I slightly misrembered. UNIX/32V was the port to the VAX, but it didn't yet include demand paging. That feature was added only in 3BSD. That doesn't really matter, though, for the point I was trying to bring across: Saying "FreeBSD doesn't actually swap these days; uses demand paging" is rather misleading because that makes it sound like a recent innovation when it is in fact almost forty years old. So, yes, "swap" space is a misnomer, but then again, "electricity" today isn't really about rubbing ambers together either. -- Christian "naddy" Weisgerber naddy@mips.inka.de
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