3 Commits

Author	SHA1	Message	Date
Pawel Jakub Dawidek	16a174b5c5	One key is expected from providers smaller than or equal to (2^20)*sectorsize ... bytes. Remove bogus assertion and while here remove another too obvious assertion. Reported by: Fabian Keil <freebsd-listen@fabiankeil.de> MFC after: 2 weeks	2011-04-24 10:41:13 +00:00
Pawel Jakub Dawidek	5bd8adc750	If number of keys for the given provider doesn't exceed the limit, ... allocate all of them at attach time. This allows to avoid moving keys around in the most-recently-used queue and needs no mutex synchronization nor refcounting. MFC after: 2 weeks	2011-04-21 13:35:20 +00:00
Pawel Jakub Dawidek	1e09ff3dc3	Instead of allocating memory for all the keys at device attach, ... create reasonably large cache for the keys that is filled when needed. The previous version was problematic for very large providers (hundreds of terabytes or serval petabytes). Every terabyte of data needs around 256kB for keys. Make the default cache limit big enough to fit all the keys needed for 4TB providers, which will eat at most 1MB of memory. MFC after: 2 weeks	2011-04-21 13:31:43 +00:00