Page MenuHomeFreeBSD
Files F153851389

D15293.id43673.diff
No OneTemporary
Actions

D15293.id43673.diff
View Options

Index: sys/vm/swap_pager.c
===================================================================
--- sys/vm/swap_pager.c
+++ sys/vm/swap_pager.c
@@ -1096,21 +1096,16 @@
int *rahead)
{
struct buf *bp;
+ vm_page_t bm, m;
vm_page_t mpred, msucc, p;
vm_pindex_t pindex;
daddr_t blk;
- int i, j, maxahead, maxbehind, reqcount, shift;
+ int i, maxahead, maxbehind, reqcount, shift;
reqcount = count;
- VM_OBJECT_WUNLOCK(object);
- bp = getpbuf(&nsw_rcount);
- VM_OBJECT_WLOCK(object);
-
- if (!swap_pager_haspage(object, ma[0]->pindex, &maxbehind, &maxahead)) {
- relpbuf(bp, &nsw_rcount);
+ if (!swap_pager_haspage(object, ma[0]->pindex, &maxbehind, &maxahead))
return (VM_PAGER_FAIL);
- }
/*
* Clip the readahead and readbehind ranges to exclude resident pages.
@@ -1135,32 +1130,24 @@
/*
* Allocate readahead and readbehind pages.
*/
- shift = rbehind != NULL ? *rbehind : 0;
- if (shift != 0) {
+ bm = ma[0];
+ if (rbehind != NULL) {
+ shift = *rbehind;
for (i = 1; i <= shift; i++) {
p = vm_page_alloc(object, ma[0]->pindex - i,
VM_ALLOC_NORMAL);
- if (p == NULL) {
- /* Shift allocated pages to the left. */
- for (j = 0; j < i - 1; j++)
- bp->b_pages[j] =
- bp->b_pages[j + shift - i + 1];
+ if (p == NULL)
break;
- }
- bp->b_pages[shift - i] = p;
+ bm = p;
}
- shift = i - 1;
- *rbehind = shift;
+ *rbehind = i - 1;
}
- for (i = 0; i < reqcount; i++)
- bp->b_pages[i + shift] = ma[i];
if (rahead != NULL) {
for (i = 0; i < *rahead; i++) {
p = vm_page_alloc(object,
ma[reqcount - 1]->pindex + i + 1, VM_ALLOC_NORMAL);
if (p == NULL)
break;
- bp->b_pages[shift + reqcount + i] = p;
}
*rahead = i;
}
@@ -1171,15 +1158,18 @@
vm_object_pip_add(object, count);
- for (i = 0; i < count; i++)
- bp->b_pages[i]->oflags |= VPO_SWAPINPROG;
+ for (i = 0, m = bm; i < count; i++, m = vm_page_next(m))
+ m->oflags |= VPO_SWAPINPROG;
- pindex = bp->b_pages[0]->pindex;
+ pindex = bm->pindex;
blk = swp_pager_meta_ctl(object, pindex, 0);
KASSERT(blk != SWAPBLK_NONE,
("no swap blocking containing %p(%jx)", object, (uintmax_t)pindex));
VM_OBJECT_WUNLOCK(object);
+ bp = getpbuf(&nsw_rcount);
+ for (i = 0, m = bm; i < count; i++, m = vm_page_next(m))
+ bp->b_pages[i] = m;
bp->b_flags |= B_PAGING;
bp->b_iocmd = BIO_READ;

File Metadata

Mime Type
text/plain
Expires
Sat, Apr 25, 6:23 AM (3 h, 20 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
32113766
Default Alt Text
D15293.id43673.diff (2 KB)

Event Timeline