http://bugzilla.novell.com/show_bug.cgi?id=559740
http://bugzilla.novell.com/show_bug.cgi?id=559740#c6
--- Comment #6 from Don Hughes 2009-12-02 18:05:49 UTC ---
While researching another issue, I came across the following in ip_tables.c
which may be related:
/*
We keep a set of rules for each CPU, so we can avoid write-locking
them in the softirq when updating the counters and therefore
only need to read-lock in the softirq; doing a write_lock_bh() in user
context stops packets coming through and allows user context to read
the counters or update the rules.
Hence the start of any table is given by get_table() below. */
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