[linux-cifs-client] Re: zombie cifsd kernel threads

[Steven French]

My guess about seeing a zombie cifsd thread that goes away on unmount - in 
that version of the 2.4 cifs code, cifsd had cases in which it would 
prematurely exit due to what turned out to be "expected" network errors. I 
have reworked the "cifs_demultiplex_thread" function (which is running in 
the cifsd background process, one per server you are connected to, and is 
used to receive all smb/cifs replies from the server and dish them out to 
the right process on the client) in 2.6 but have not backported it to 
Linux 2.4 yet.

If you can still do operations to the server, then cifsd is working of 
course no matter what its process state displays as on your distro, but if 
you are seeing requests hang and cifsd in zombie state then I expect that 
it would be fixed by a backport of the fixes in cifs_demultiplex_thread 
code in fs/cifs/connect.c from 2.6 to 2.4    I know there are cases I have 
fixed in which cifsd could prematurely exit in that older version of the 
cifs vfs.




Steve French
Senior Software Engineer
Linux Technology Center - IBM Austin
phone: 512-838-2294
email: sfrench at-sign us dot ibm dot com
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