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Annotation of 41BSD/sys/h/vmklust.h, revision 1.1.1.1

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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