diff options
Diffstat (limited to 'sys/vm/swap_pager.c')
| -rw-r--r-- | sys/vm/swap_pager.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/sys/vm/swap_pager.c b/sys/vm/swap_pager.c index a32d212..25f7674 100644 --- a/sys/vm/swap_pager.c +++ b/sys/vm/swap_pager.c @@ -39,7 +39,7 @@ * from: Utah $Hdr: swap_pager.c 1.4 91/04/30$ * * @(#)swap_pager.c 8.9 (Berkeley) 3/21/94 - * $Id: swap_pager.c,v 1.42 1995/07/13 08:48:15 davidg Exp $ + * $Id: swap_pager.c,v 1.43 1995/07/16 13:28:34 davidg Exp $ */ /* @@ -708,6 +708,7 @@ swap_pager_haspage(object, offset, before, after) { register sw_blk_t swb; int ix; + int gix; if (before != NULL) *before = 0; @@ -718,10 +719,35 @@ swap_pager_haspage(object, offset, before, after) return (FALSE); } swb = &object->un_pager.swp.swp_blocks[ix]; - ix = (offset % (SWB_NPAGES * PAGE_SIZE)) / PAGE_SIZE; + gix = offset / PAGE_SIZE; + ix = gix % SWB_NPAGES; + if (swb->swb_block[ix] != SWB_EMPTY) { - if (swb->swb_valid & (1 << ix)) + + if (swb->swb_valid & (1 << ix)) { + int tix; + if (before) { + for(tix = ix - 1; tix >= 0; --tix) { + if ((swb->swb_block[tix] - + (ix - tix) * (PAGE_SIZE/DEV_BSIZE)) != + swb->swb_block[ix]) + break; + (*before)++; + } + } + + if (after) { + for(tix = ix + 1; tix < SWB_NPAGES; tix++) { + if ((swb->swb_block[tix] + + (tix - ix) * (PAGE_SIZE/DEV_BSIZE)) != + swb->swb_block[ix]) + break; + (*after)++; + } + } + return TRUE; + } } return (FALSE); } |
