Date: Wed, 12 May 1999 10:04:09 +0200 From: Poul-Henning Kamp <phk@freebsd.org> To: current@freebsd.org Subject: simple (but important) task for junior kernel hacker Message-ID: <3694.926496249@critter.freebsd.dk>
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I don't have time just now to attend this particular detail, which manifests itself by swapinfo/pstat -p showing "/dev/(null)" for device name. The problem in short is that libkvm:kvm_getswapinfo.c has it's fingers in the kernels memory and pulls out a dev_t without knowing how to (and it shouldn't be taught this!) convert it to a udev_t. The Right Way to solve this problem is to rewrite libkvm:kvm_getswapinfo.c to pick up the information using some (for this purpose constructed) sysctl variables (sysctlbyname(3) please!), and let the kernel convert the dev_t to udev_t before passing it out to userland. So for any aspiring kernel hackers out there: have at it. Patches accepted. In general libkvm should not grovel around in a running kernel but only use sysctlbyname(3). -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." FreeBSD -- It will take a long time before progress goes too far! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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