Mercurial > hg > blitz_condensed
comparison src/org/dancres/blitz/arc/sync_cond.txt @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
| author | Dan Creswell <dan.creswell@gmail.com> |
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| date | Sat, 21 Mar 2009 11:00:06 +0000 |
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| -1:000000000000 | 0:3dc0c5604566 |
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| 1 Could we schedule I/O in such a fashion as to be outside of locks involved in | |
| 2 a deadlock situation? | |
| 3 | |
| 4 Cache lock = sync() lock in ArcCache. | |
| 5 CBD lock is the individual mutex of a CBD. | |
| 6 | |
| 7 What are the conditions for achieving this? | |
| 8 | |
| 9 We must have done all cache list modifications before releasing the cache lock. | |
| 10 - This ensures another thread doesn't, for example, recover a CBD with one | |
| 11 id which, in fact, is being "renamed" to another id. | |
| 12 - We must also do this to protect the state of the various lists which | |
| 13 constitute a chunk of the cache state. Question, is the state of a CDB's | |
| 14 content part of the cache state? |