the optional debug level in a "severity debug"
clause of a logging channel to be omitted.
This is now allowed and treated as "severity
debug 1;" like it did in BIND 8.2.4, not as
"severity debug 0;" like it did in BIND 9.1.
[RT #1367]
wait at least six seconds between each pass of the tree. This keeps
the CPU from being bogged down in a persistent overlimit condition, and
because it uses timers also lets the cache cleaner know right away when
the server is being shut down, so it can stop trying to clean.
Also fixed an unlocked access to cache->live_tasks in dns_cache_detach().
Also fixed a problem with repeated calls to dns_cache_setcachesize() setting
the database as not overmem, even though it might have still been in
the process of cleaning from a previous limit. Just set the new
isc_mem_setwater() limits instead and let the mem.c call water() if cleaning
needs to be either started or stopped because of the new limits.
Minor code cleanups.
is not null then hi_water must exceed lo_water and both must be > 0.
Now requires hi_water >= lo_water, and they can both be 0. Not allowing
them to be equal was just an unnecessary restriction, and letting them be 0
is useful for the case where the context has had non-zero values set, went
over hi_water and called the callback, and then wanted to remove limits
(perhaps because of a reconfiguration). This allows the callback to
be signaled as ISC_MEM_LOWATER on the next isc_mem_put(), which the caller
might need to terminate any outstanding action that was triggered by
the hi_water.
required good entropy only when 'param' (to dst_key_generate) was non-zero.
Since the default was always to require good entropy, that default behavior
has been restored and now a non-zero param means that pseudorandom is ok.
*wanted* to add on the last check-in.
The second argument to hmacmd5_generate is no longer unused, it is a flag
to say whether good entropy is needed or not. This change was approved
by Brian. The control channel key generator needed it to be able to do
its job all on-the-fly.
