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1.1 ! root 1: /* vmklust.h 4.1 11/9/80 */ ! 2: ! 3: /* ! 4: * Klustering constants. Klustering is the gathering ! 5: * of pages together for pagein/pageout, while clustering ! 6: * is the treatment of hardware page size as though it were ! 7: * larger than it really is. ! 8: * ! 9: * KLMAX gives maximum cluster size in CLSIZE page (cluster-page) ! 10: * units. Note that KLMAX*CLSIZE must be <= DMMIN in dmap.h. ! 11: */ ! 12: ! 13: #define KLMAX (16/CLSIZE) ! 14: #define KLIN (4/CLSIZE) /* Read up to 4 pages */ ! 15: #define KLOUT (16/CLSIZE) /* Write up to 16 pages */ ! 16: ! 17: #ifdef KERNEL ! 18: int klin; ! 19: int klout; ! 20: #endif
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