Date: Sun, 7 Mar 2004 14:28:07 -0500 (EST) From: Robert Watson <rwatson@FreeBSD.org> To: "Brian F. Feldman" <green@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/nfsserver nfs.h nfs_srvsock.c nfs_srvsubs.c Message-ID: <Pine.NEB.3.96L.1040307142423.2700A-100000@fledge.watson.org> In-Reply-To: <200403071650.i27GoRkA025174@green.homeunix.org>
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On Sun, 7 Mar 2004, Brian F. Feldman wrote: > Alexander Kabaev <kan@FreeBSD.org> wrote: > > kan 2004/03/07 08:28:31 PST > > > > FreeBSD src repository > > > > Modified files: > > sys/nfsserver nfs.h nfs_srvsock.c nfs_srvsubs.c > > Log: > > Convert from timeout to callout API. > > > > Submitted by: rwatson > > Does this "fix" the 1KHz interrupts? Unfortunately, no. That will require some changes to the NFS code, but it's not clear how substantial changes are required. Right now, the NFS/RPC code polls a workqueue to see if work needs to happen. With a bit of restructuring, it could move to a more scheduled model, where it relies on callout() to schedule things when they need to happen and maintains a queue or heap of work items. One of the nice things about the callout interface is that it makes the MPSAFE choice explicit to the consumer of the interface... Another problem with the NFS code is that each of these callouts requires Giant; removing Giant from these callouts is another good thing to work on. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Senior Research Scientist, McAfee Research
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