Date: Mon, 28 Oct 2002 11:50:52 +0900 From: Seigo Tanimura <tanimura@axe-inc.co.jp> To: Bruce Evans <bde@zeta.org.au> Cc: Julian Elischer <julian@elischer.org>, Jeff Roberson <jroberson@chesapeake.net>, Seigo Tanimura <tanimura@axe-inc.co.jp>, <current@FreeBSD.ORG>, <tanimura@FreeBSD.ORG> Subject: Re: Dynamic growth of the buffer and buffer page reclaim Message-ID: <200210280250.g9S2oqoK077311@shojaku.t.axe-inc.co.jp> In-Reply-To: <20021024143639.P25932-100000@gamplex.bde.org> References: <Pine.BSF.4.21.0210231418520.36940-100000@InterJet.elischer.org> <20021024143639.P25932-100000@gamplex.bde.org>
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On Thu, 24 Oct 2002 15:05:30 +1000 (EST), Bruce Evans <bde@zeta.org.au> said: bde> Almost exactly what we have. It turns out to be not very good, at least bde> in its current implementation, since remapping is too expensive. Things bde> work OK to the extent that remapping is not required, but so would a bde> much simpler implementation that uses less vm and more copying of data bde> (copying seems to be faster than remapping). Which process is expensive in remapping? Allocation of a KVA space? Page wiring? Or pmap operation? -- Seigo Tanimura <tanimura@axe-inc.co.jp> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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