Detailed revision comments:

r6525 | marko | 2010-01-28 16:23:15 +0200 (Thu, 28 Jan 2010) | 11 lines
branches/zip: buf_LRU_invalidate_tablespace(): Do not unnecessarily
acquire the block_mutex for every block in the LRU list. Only acquire
it when holding buf_pool_mutex is not sufficient. This should speed up
the function and considerably reduce traffic on the memory bus and
caches.

I noticed this deficiency when working on Issue #157.
This deficiency popped up again in Issue #449 (Bug #35077),
which this fix does not fully address.

rb://78 revision 1 approved by Heikki Tuuri.