Date: Tue, 25 Aug 1998 10:41:07 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Doug Rabson <dfr@nlsystems.com> Cc: "John S. Dyson" <dyson@iquest.net>, current@FreeBSD.ORG Subject: Re: Serious bug in vm_page.h in current Message-ID: <199808251441.KAA02038@khavrinen.lcs.mit.edu> In-Reply-To: <Pine.BSF.4.01.9808251006570.17263-100000@herring.nlsystems.com> References: <199808250840.DAA00444@dyson.iquest.net> <Pine.BSF.4.01.9808251006570.17263-100000@herring.nlsystems.com>
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<<On Tue, 25 Aug 1998 10:11:36 +0100 (BST), Doug Rabson <dfr@nlsystems.com> said: > On Tue, 25 Aug 1998, John S. Dyson wrote: >> PAGE_BWAKEUP would decr busy, and wakeup if PG_WANTED >> and busy == 0. >> >> PAGE_WAKEUP would clear PG_BUSY, and wakeup if PG_WANTED. >> >> Each of the above would ignore the other condition. There will >> be extra wakeups, but those won't significantly affect performance. > I don't understand this part of the code of the code very well. It > doesn't seem to me that a few extra wakeups is a problem. Not waking up > at all is a problem... This sounds very much like it could be related to the lockup Matt Dillon and I have been seeing. I just rebooted newsswitch with this change in it; I should know by the end of the day whether it had any effect. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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