Messages in this thread | | | From | Frans Pop <> | Subject | [regression] nfs4: 30 second delay during umount of remote fs on system shutdown | Date | Thu, 28 Feb 2008 18:29:15 +0100 |
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With 2.6.25-rc2 and -rc3 I noticed a pause of 30 seconds when my system (Debian unstable, x86_64) is being shutdown. The cause is the unmounting of an nfs4 remote file system. The pause does not happen with 2.6.24. I'm unsure about 2.6.25-rc1 as I was concentrating on other issues when I was testing that.
I can reproduce the same pause on an active system by stopping portmap before doing an umount of the filesystem.
The shutdown sequence on my box includes: K20nfs-common [...] S20sendsigs [...] S31umountnfs.sh S32portmap
So it seems that things should be OK (S32portmap is after S31umountnfs.sh), but in fact portmap has already been killed during S20sendsigs!
I have verified that portmap is also not running during S31umountnfs.sh with 2.6.24, so apparently there has been a change in the kernel that has made umount look for portmap and cause the 30 second delay if it is not running.
Is this a kernel regression?
Cheers, FJP
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