Messages in this thread | | | Date | Mon, 5 May 2003 15:12:38 -0700 | From | jw schultz <> | Subject | Re: processes stuck in D state |
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On Mon, May 05, 2003 at 06:25:48PM +0200, Michael Buesch wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Monday 05 May 2003 17:24, Mike Waychison wrote: > > On Mon, 5 May 2003, Michael Buesch wrote: > > > On Monday 05 May 2003 07:52, Zeev Fisher wrote: > > > > Hi! > > > > > > Hi Zeev! > > > > > > > I got a continuos problem of unkillable processes stuck in D state ( > > > > uninterruptable sleep ) on my Linux servers. > > > > It happens randomly every time on other server on another process ( all > > > > the servers are configured the same with 2.4.18-10 kernel ). Here's an > > > > example : > > > > > > [snip] > > > > > > > Has anyone noticed the same behavior ? Is this a well known problem ? > > > > > > I've had the same problem with some 2.4.21-preX twice (or maybe more > > > times, don't remember) on one of my machines. > > > IMHO it has something to do with NFS. (I'm using this box as a > > > NFS-client). I wish, I could reproduce it one more time, to do some > > > traces, etc on it. But I've not found a way to reproduce it, yet. > > > > This happens when you mount an NFS mount with the 'hard' option (default) > > and a mount's handle expires incorrectly (eg: server crash). > > Read the mount manpage for an explanation to the downsides of using > > the 'soft' option. > > > > > > Mike Waychison > > my fstab-entry: > 192.168.0.50:/mnt/nfs_1 /mnt/nfs_1 nfs rw,hard,intr,user,nodev,nosuid,exec 0 0 > > from man mount: > [snip] The process cannot be interrupted or killed unless you also specify intr. [/snip] > > I can't interrupt any process that accessed the NFS-server > while shutting down the server, although intr is specified. > _That's_ my problem. :)
I had a similar problem with SuSE's 2.4.18. Random processes seemed to go into D state from whence intr is useless.
I rebuilt the kernel with NFSv3 disabled and that problem went away. The logs are full of May 5 14:54:15 duncan kernel: NFS: NFSv3 not supported. May 5 14:54:15 duncan kernel: nfs warning: mount version older than kernel but that i can live with. Processes hung and umount failing i cannot abide.
If there is a better answer, i'm listening.
-- ________________________________________________________________ J.W. Schultz Pegasystems Technologies email address: jw@pegasys.ws
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