Date: Thu, 13 Nov 1997 09:31:07 -0500 (EST) From: "Ron G. Minnich" <rminnich@Sarnoff.COM> To: freebsd-hackers@FreeBSD.ORG Subject: Re: BSDI F0 bug workaround implementation Message-ID: <Pine.SUN.3.91.971113092136.5504A-100000@terra> In-Reply-To: <Pine.BSF.3.96.971113093335.22485A-100000@iclub.nsu.ru>
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I'm not sure I understand the full implications of the impact of this hack, although it is worrisome. Judging by what my pentium book says about the layout of the IDT, it seems like it will increase interrupt latency for page faults and many maskable interrupts. Can anyone more knowledgeable than I comment on this? Page fault overhead on freebsd is pretty high: would a short-cut make sense that does not go through the full vm system for this? Otherwise page fault overhead may come close to doubling ... thanks ron Ron Minnich |Java: an operating-system-independent, rminnich@sarnoff.com |architecture-independent programming language (609)-734-3120 |for Windows/95 and Windows/NT on the Pentium ftp://ftp.sarnoff.com/pub/mnfs/www/docs/cluster.html
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