Date: Wed, 19 Dec 2007 08:02:24 -0800 From: David G Lawrence <dg@dglawrence.com> To: Bruce Evans <brde@optusnet.com.au> Cc: freebsd-net@freebsd.org, freebsd-stable@freebsd.org Subject: Re: Packet loss every 30.999 seconds Message-ID: <20071219160224.GD25053@tnn.dglawrence.com> In-Reply-To: <20071219151926.GA25053@tnn.dglawrence.com> References: <20071217103936.GR25053@tnn.dglawrence.com> <20071218170133.X32807@delplex.bde.org> <47676E96.4030708@samsco.org> <20071218233644.U756@besplex.bde.org> <20071218141742.GS25053@tnn.dglawrence.com> <20071219022102.I34422@delplex.bde.org> <20071218165732.GV25053@tnn.dglawrence.com> <20071218181023.GW25053@tnn.dglawrence.com> <20071219235444.K928@besplex.bde.org> <20071219151926.GA25053@tnn.dglawrence.com>
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> In any case, it appears that my patch is a no-op, at least for the > problem I was trying to solve. This has me confused, however, because at > one point the problem was mitigated with it. The patch has gone through > several iterations, however, and it could be that it was made to the top > of the loop, before any of the checks, in a previous version. Hmmm. (replying to myself) I just found an earlier version of the patch, and sure enough, it was to the top of the loop. Unfortunately, that version caused the system to crash because vp was occasionally invalid after the wakeup. Anyway, let's see if Mark's packet loss problem is indeed related to this code. If he does the find just after boot and immediately sees the problem, then I would say that is fairly conclusive. He could also release the cached vnodes by temporarily setting kern.maxvnodes=10000 and then setting it back to whatever it was previously (probably 60000-100000). If the problem then goes away for awhile, that would be another good indicator. -DG David G. Lawrence President Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500 The FreeBSD Project - http://www.freebsd.org Pave the road of life with opportunities.
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