Re: Network block device seems to be blocked

From: Pavel Machek (pavel@suse.cz)
Date: Fri Apr 28 2000 - 03:15:51 EST

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Hi!

> Network block device appears to be blocked when I copy the many
> files on exported filesystem. Like this.
>
> ./nbd-client cosmo 3000 /dev/nb0 &
> mount -t ext2 /dev/nb0 /mnt
> cd mnt
> ls
> /manyfilesdir lost+found/
> cp -r manyfilesdir .
> < -- blocked. prompt never returns -->
>
> This is occured in both 2.2.14 and 2.3.9pre-6 kernels.
> Although, it failed, I found that it sucess to copy many files in
> local to exported filesystem vise versa.
>
> The following is a result of netstat when blocking is occured.
> Proto Recv-Q Send-Q Local Address Foreign Address State
> tcp 0 126 matrix.mickey.ai:telnet cosmo.mickey.ai.ky:4874
> ESTABLISHED
> tcp 0 0 matrix.mickey.ai:telnet cosmo.mickey.ai.ky:4872
> ESTABLISHED
> tcp 0 0 matrix.mickey.ai:telnet cosmo.mickey.ai.ky:4889
> ESTABLISHED
> tcp 51084 54020 matrix.mickey.ai.k:1039 cosmo.mickey.ai.ky:3000
> ESTABLISHED

You could try to ps -auxl on both client and server. You could enable
debugging in server and see what is going on.
Pavel

-- The best software in life is free (not shareware)! Pavel GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+

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