Differential D8497 Diff 22225 head/sys/vm/vnode_pager.c

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head/sys/vm/vnode_pager.c

Show First 20 Lines • Show All 460 Lines • ▼ Show 20 Lines	if ((nsize & PAGE_MASK) &&
/*		/*
* Clear out partial-page dirty bits.		* Clear out partial-page dirty bits.
*		*
* note that we do not clear out the valid		* note that we do not clear out the valid
* bits. This would prevent bogus_page		* bits. This would prevent bogus_page
* replacement from working properly.		* replacement from working properly.
*/		*/
vm_page_clear_dirty(m, base, PAGE_SIZE - base);		vm_page_clear_dirty(m, base, PAGE_SIZE - base);
} else if ((nsize & PAGE_MASK) &&
vm_page_is_cached(object, OFF_TO_IDX(nsize))) {
vm_page_cache_free(object, OFF_TO_IDX(nsize),
nobjsize);
}		}
}		}
object->un_pager.vnp.vnp_size = nsize;		object->un_pager.vnp.vnp_size = nsize;
object->size = nobjsize;		object->size = nobjsize;
VM_OBJECT_WUNLOCK(object);		VM_OBJECT_WUNLOCK(object);
}		}

/*		/*
▲ Show 20 Lines • Show All 408 Lines • ▼ Show 20 Lines	if (rbehind) {
if ((p = TAILQ_PREV(m[0], pglist, listq)) != NULL &&		if ((p = TAILQ_PREV(m[0], pglist, listq)) != NULL &&
p->pindex >= startpindex)		p->pindex >= startpindex)
startpindex = p->pindex + 1;		startpindex = p->pindex + 1;

/* tpindex is unsigned; beware of numeric underflow. */		/* tpindex is unsigned; beware of numeric underflow. */
for (tpindex = m[0]->pindex - 1;		for (tpindex = m[0]->pindex - 1;
tpindex >= startpindex && tpindex < m[0]->pindex;		tpindex >= startpindex && tpindex < m[0]->pindex;
tpindex--, i++) {		tpindex--, i++) {
p = vm_page_alloc(object, tpindex, VM_ALLOC_NORMAL \|		p = vm_page_alloc(object, tpindex, VM_ALLOC_NORMAL);
VM_ALLOC_IFNOTCACHED);
if (p == NULL) {		if (p == NULL) {
/* Shift the array. */		/* Shift the array. */
for (int j = 0; j < i; j++)		for (int j = 0; j < i; j++)
bp->b_pages[j] = bp->b_pages[j +		bp->b_pages[j] = bp->b_pages[j +
tpindex + 1 - startpindex];		tpindex + 1 - startpindex];
break;		break;
}		}
bp->b_pages[tpindex - startpindex] = p;		bp->b_pages[tpindex - startpindex] = p;
Show All 20 Lines	if (rahead) {
if ((p = TAILQ_NEXT(m[count - 1], listq)) != NULL &&		if ((p = TAILQ_NEXT(m[count - 1], listq)) != NULL &&
p->pindex < endpindex)		p->pindex < endpindex)
endpindex = p->pindex;		endpindex = p->pindex;
if (endpindex > object->size)		if (endpindex > object->size)
endpindex = object->size;		endpindex = object->size;

for (tpindex = m[count - 1]->pindex + 1;		for (tpindex = m[count - 1]->pindex + 1;
tpindex < endpindex; i++, tpindex++) {		tpindex < endpindex; i++, tpindex++) {
p = vm_page_alloc(object, tpindex, VM_ALLOC_NORMAL \|		p = vm_page_alloc(object, tpindex, VM_ALLOC_NORMAL);
VM_ALLOC_IFNOTCACHED);
if (p == NULL)		if (p == NULL)
break;		break;
bp->b_pages[i] = p;		bp->b_pages[i] = p;
}		}

bp->b_pgafter = i - bp->b_npages;		bp->b_pgafter = i - bp->b_npages;
bp->b_npages = i;		bp->b_npages = i;
} else		} else
▲ Show 20 Lines • Show All 439 Lines • Show Last 20 Lines