Date: Fri, 13 Oct 2000 12:40:28 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Terry Lambert <tlambert@primenet.com> Cc: (FreeBSD SMP list) <FreeBSD-smp@FreeBSD.org>, (Jason Evans) <jasone@FreeBSD.org>, (Greg Lehey) <grog@lemis.com> Subject: Re: New mutexes (was: cvs commit: src/sys/conf param.c src/sys/k Message-ID: <XFMail.001013124028.jhb@FreeBSD.org> In-Reply-To: <200010130244.TAA03795@usr05.primenet.com>
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On 13-Oct-00 Terry Lambert wrote: >> I'm just doing the slides for the Con, and going through the sources I >> note that we have sprouted a plethora of mutexes over the last month. >> How are we keeping track of them? How does somebody who wants to add >> a new mutex know where the mines are? > > The mines are anywhere more than 1 mutex is held, anywhere that > a mutex is held with a recursion count greater than 0, and > anywhere code that can sleep holds a mutex. We are working on a list of rules atm, the current list can be found on the SMP website (http://www.FreeBSD.org/~jasone/smp/). > --- > > As to tracking them: use a mutex. 8-). > > Acquire the mutex that allows you to add a mutex > Add the new mutex > Release the mutex adding mutex (Requires you to document your addition) We already do this. Please, at least look at the code we are using. -- 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-smp" in the body of the message
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