Date: Fri, 10 Mar 2006 12:40:00 -0500 From: "Rong-En Fan" <grafan@gmail.com> To: stable@freebsd.org Subject: nfsclient process stucks in nfsaio Message-ID: <6eb82e0603100940s7d505e26w5351d708b714aefe@mail.gmail.com>
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Hi, After upgrading several our nfs clients from 5.4-RELEASE to 6.0-RELEASE and some are now 6.1-PRERELEASE (a weeks ago). From time to time, we saw some processes stuck in nfsaio, and unkillable. These processes generate lots of traffic to nfs server (write to nfs, but nfs server's disk= does not really in write. from netstat, client sends ~100Mbps, on nfs server, io= stat does not show me ~12.5MB/s). The nfsd on the server side is either in RUN or in ufs state. Server is running 5.5-PRELEASE as of yesterday. Client mount options: rw,nosuid,bg,intr,nodev. Both client and server are running rpc.lockd, rpc.statd. I'm sure it's not related to any locking problems. I have another set of nfs server/client both running 6.0-RELEASE. And I can easily reproduce this situation on these two boxesnes, just by running dd if=3D/dev/zero of=3D/nfs/ooo bs=3D1m If I do not add bs=3D1m, it works fine. Of all the boxes I mentioned above, I did not do anything special to kernel config, i.e., they are GENERIC w/o unnecessary devices and w/ firewal. Basically, I can do anything on these two boxes (they are not in production mode). Any suggestion are welcome. Thanks, Rong-En Fan
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