Date: Wed, 27 Jun 2001 21:16:30 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Doug Rabson <dfr@nlsystems.com> Cc: alpha@FreeBSD.ORG Subject: Re: pmap_emulate_reference() Message-ID: <XFMail.010627211630.jhb@FreeBSD.org> In-Reply-To: <Pine.BSF.4.33.0106280021530.97752-100000@herring.nlsystems.com>
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On 27-Jun-01 Doug Rabson wrote: > On Thu, 28 Jun 2001, Doug Rabson wrote: > >> Based on a conversation at lunch today, I decided to try rewriting >> pmap_emulate_reference() to avoid the need for the vm lock. Basically, I >> just use a couple of extra bits in the pte to store the changed/referenced >> state and defer the hard work to pmap_ts_referenced() etc. >> >> I haven't (obviously) tested this since I'm at Usenix but I think the >> principle is sound. >> > > This version is a bit simpler... It also means that pmap_emulate_reference() won't need the vm lock anymore, which is a big win here. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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