Date: Tue, 04 Aug 1998 21:56:00 -0700 From: David Greenman <dg@root.com> To: Terry Lambert <tlambert@primenet.com> Cc: ben@rosengart.com, hackers@FreeBSD.ORG Subject: Re: executables over NFS Message-ID: <199808050456.VAA07690@implode.root.com> In-Reply-To: Your message of "Wed, 05 Aug 1998 00:40:55 -0000." <199808050040.RAA26291@usr02.primenet.com>
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>> Are executables loaded over NFS treated the same as local executables >> with regard to paging? Specifically, do they use the remote file as >> backing store, or local swap space? > >They are treated as local files -- that is, first page-in is from >the vnode, and subsequently aggressively cached, including page-out >to local swap store in preference to discard, so subsequent page-in >is from local swap store. That is not true. In no case will vnode-backed pages be paged out to swap. The only case where VM could start out as vnode backed and end up in swap is after a COW, in which case a swap-backed page is created. This behavior is not modified by the underlying file system type. -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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