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> firefox freezes with fscache_wait_on_page_write
dfitz1965
 Posted: Sep 23 2016, 06:18 PM
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Hello,

I have 30 Scientific Linux workstations, recently updated to 6.8. User home directories are automounted over nfs from a CentOS 7 server. Recently, all of my users who are automounted over nfs are not able to use Firefox. Firefox starts up, then freezes. Once frozen, the Firefox process can not be killed even with kill -9.

ps -elf on the Firefox process shows:
0 D testuser 21452 1 0 80 0 - 222039 fscach 13:42 ? 00:00:02 /usr/lib64/firefox/firefox
The D showing it is in an uninterruptable sleep state and the fscach being fscache_wait_on_page_write.
So Firefox is waiting for something, and it is related to my nfs setup, but I am stuck on what to do next.

My /etc/export file on my server is:
/export/home/students xxx.xxx.xxx.0/24(rw,async)

And the automount configuration on the clients being:
* -fstype=nfs,bg,soft,intr,rsize=1048576,async,wsize=1058576,noatime server:/export/home/students/&

The weird thing is that Firefox is the only program we have seen (so far) that is acting up. Reading and writing to the home directories is not affected.

Can anyone help?

Thanks!
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tux99
 Posted: Sep 25 2016, 12:03 AM
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Try sync rather than async.

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My personal SL6 repository, specialized in audio/video software: http://pkgrepo.linuxtech.net/el6/
(can be used together with EPEL and ELRepo repositories) - repository mirror: http://linuxsoft.cern.ch/linuxtech/el6/
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