Most recent kernel where this bug did not occur: 2.6.23.1 Distribution: Debian/unstable, i386 Hardware Environment: AMD 2600+, 2GB RAM, see http://nerdbynature.de/bits/2.6.24-rc2/nfsd/dmesg.2.gz Software Environment: nfs-kernel-server 1.1.1-8 Problem Description: Exported NFS shares can be mounted (client: 2.6-git/powerpc32, nfs-common-1.1.1~git-20070709-3ubuntu1), but running "ls /mountpoint" (even without "-l") on the client is enough to get the [nfsd] processes in "D" state. Doing this again will put more [nfsd] processes in "D" state and the loadavg is incremented +1. Restarting the rpc.nfsd process on the does not help much, the new rpc.nfsd processes get stuck quickly. This has been reported by Chris Wedgwood too: http://lkml.org/lkml/2007/11/14/50 More details: http://www.nerdbynature.de/bits/2.6.24-rc2/nfsd/ Steps to reproduce: http://www.nerdbynature.de/bits/2.6.24-rc2/nfsd/debug.txt.gz Workarounds: * mount -o vers=2 (tested, works) * mount -o vers=3,nordirplus * set CONFIG_NFSD to "depends on !XFS && ..."
*** Bug 9377 has been marked as a duplicate of this bug. ***
*** Bug 9369 has been marked as a duplicate of this bug. ***
This is clearly a regression. (But I don't seem to have the rights to change it.)
Patch is available: http://lkml.org/lkml/2007/11/25/39
fix is still not in 2.6.24-rc4, due to undergoing more QA: http://lkml.org/lkml/2007/11/30/24
resolved by: commit e89bc612d61edbcefaeb6f2244f86c0f3ec89d23 Author: Christoph Hellwig <hch@infradead.org> Date: Fri Dec 7 14:07:53 2007 +1100 [XFS] revert to double-buffering readdir