HellO:
I thought I will warn everybody about a possible AdvFS hang
after installing patch kit 5.1b-3.
If you use clones with AdvFS, then there will be a racing
condition that will force the entire system to hang. There will
be two problems:
1. A deadlock can occur between a migration and a flush on a
file. One thread will be waiting in insert_actRange_onto_list()
and the other in cfs_condio_cc_excl_mode_enter().
2. A deadlock can occur when a clone fileset is mounted, and
there are racing threads that are modifying a common file via
memory mapping. One thread will be waiting in cow_get_locks
and the other in msfs_mmap.
We were hit by this bug. Fortunately, there is a patch
available at ITRC T64KIT0025601-V51BB26-E-20050513. You will
want to install this if you plan to use clones with AdvFS.
Cheers,
-- mahendra
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A. Mahendra Rajah Email: Mahendra.Rajah_at_URegina.CA
Tru64 UNIX Systems Manager Phone: (306) 585-4496
Dept. of Computing Services FAX: (306) 337-2324
University of Regina,
Regina, Sask., S4S 0A2
Canada.
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Received on Thu Jun 09 2005 - 15:26:41 NZST