patch-2.3.38 linux/mm/vmscan.c

• Lines: 178
• Date: Thu Jan 6 16:21:23 2000
• Orig file: v2.3.37/linux/mm/vmscan.c
• Orig date: Wed Dec 29 13:13:21 1999

diff -u --recursive --new-file v2.3.37/linux/mm/vmscan.c linux/mm/vmscan.c
@@ -33,7 +33,7 @@
  * using a process that no longer actually exists (it might
  * have died while we slept).
  */
-static int try_to_swap_out(struct vm_area_struct* vma, unsigned long address, pte_t * page_table, int gfp_mask)
+static int try_to_swap_out(struct vm_area_struct* vma, unsigned long address, pte_t * page_table, int gfp_mask, zone_t *zone)
 {
 	pte_t pte;
 	swp_entry_t entry;
@@ -60,8 +60,7 @@
 
 	if (PageReserved(page)
 	    || PageLocked(page)
-	    || ((gfp_mask & __GFP_DMA) && !PageDMA(page))
-	    || (!(gfp_mask & __GFP_HIGHMEM) && PageHighMem(page)))
+	    || (zone && (!memclass(page->zone, zone))))
 		goto out_failed;
 
 	/*
@@ -196,7 +195,7 @@
  * (C) 1993 Kai Petzke, wpp@marie.physik.tu-berlin.de
  */
 
-static inline int swap_out_pmd(struct vm_area_struct * vma, pmd_t *dir, unsigned long address, unsigned long end, int gfp_mask)
+static inline int swap_out_pmd(struct vm_area_struct * vma, pmd_t *dir, unsigned long address, unsigned long end, int gfp_mask, zone_t *zone)
 {
 	pte_t * pte;
 	unsigned long pmd_end;
@@ -218,7 +217,7 @@
 	do {
 		int result;
 		vma->vm_mm->swap_address = address + PAGE_SIZE;
-		result = try_to_swap_out(vma, address, pte, gfp_mask);
+		result = try_to_swap_out(vma, address, pte, gfp_mask, zone);
 		if (result)
 			return result;
 		address += PAGE_SIZE;
@@ -227,7 +226,7 @@
 	return 0;
 }
 
-static inline int swap_out_pgd(struct vm_area_struct * vma, pgd_t *dir, unsigned long address, unsigned long end, int gfp_mask)
+static inline int swap_out_pgd(struct vm_area_struct * vma, pgd_t *dir, unsigned long address, unsigned long end, int gfp_mask, zone_t *zone)
 {
 	pmd_t * pmd;
 	unsigned long pgd_end;
@@ -247,7 +246,7 @@
 		end = pgd_end;
 	
 	do {
-		int result = swap_out_pmd(vma, pmd, address, end, gfp_mask);
+		int result = swap_out_pmd(vma, pmd, address, end, gfp_mask, zone);
 		if (result)
 			return result;
 		address = (address + PMD_SIZE) & PMD_MASK;
@@ -256,7 +255,7 @@
 	return 0;
 }
 
-static int swap_out_vma(struct vm_area_struct * vma, unsigned long address, int gfp_mask)
+static int swap_out_vma(struct vm_area_struct * vma, unsigned long address, int gfp_mask, zone_t *zone)
 {
 	pgd_t *pgdir;
 	unsigned long end;
@@ -271,7 +270,7 @@
 	if (address >= end)
 		BUG();
 	do {
-		int result = swap_out_pgd(vma, pgdir, address, end, gfp_mask);
+		int result = swap_out_pgd(vma, pgdir, address, end, gfp_mask, zone);
 		if (result)
 			return result;
 		address = (address + PGDIR_SIZE) & PGDIR_MASK;
@@ -280,7 +279,7 @@
 	return 0;
 }
 
-static int swap_out_mm(struct mm_struct * mm, int gfp_mask)
+static int swap_out_mm(struct mm_struct * mm, int gfp_mask, zone_t *zone)
 {
 	unsigned long address;
 	struct vm_area_struct* vma;
@@ -301,7 +300,7 @@
 			address = vma->vm_start;
 
 		for (;;) {
-			int result = swap_out_vma(vma, address, gfp_mask);
+			int result = swap_out_vma(vma, address, gfp_mask, zone);
 			if (result)
 				return result;
 			vma = vma->vm_next;
@@ -323,7 +322,7 @@
  * N.B. This function returns only 0 or 1.  Return values != 1 from
  * the lower level routines result in continued processing.
  */
-static int swap_out(unsigned int priority, int gfp_mask)
+static int swap_out(unsigned int priority, int gfp_mask, zone_t *zone)
 {
 	struct task_struct * p;
 	int counter;
@@ -384,7 +383,7 @@
 			int ret;
 
 			atomic_inc(&best->mm_count);
-			ret = swap_out_mm(best, gfp_mask);
+			ret = swap_out_mm(best, gfp_mask, zone);
 			mmdrop(best);
 
 			if (!ret)
@@ -410,7 +409,7 @@
  * cluster them so that we get good swap-out behaviour. See
  * the "free_memory()" macro for details.
  */
-static int do_try_to_free_pages(unsigned int gfp_mask)
+static int do_try_to_free_pages(unsigned int gfp_mask, zone_t *zone)
 {
 	int priority;
 	int count = SWAP_CLUSTER_MAX;
@@ -420,7 +419,7 @@
 
 	priority = 6;
 	do {
-		while (shrink_mmap(priority, gfp_mask)) {
+		while (shrink_mmap(priority, gfp_mask, zone)) {
 			if (!--count)
 				goto done;
 		}
@@ -428,21 +427,21 @@
 		/* don't be too light against the d/i cache since
 		   shrink_mmap() almost never fail when there's
 		   really plenty of memory free. */
-		count -= shrink_dcache_memory(priority, gfp_mask);
-		count -= shrink_icache_memory(priority, gfp_mask);
+		count -= shrink_dcache_memory(priority, gfp_mask, zone);
+		count -= shrink_icache_memory(priority, gfp_mask, zone);
 		if (count <= 0)
 			goto done;
 
 		/* Try to get rid of some shared memory pages.. */
 		if (gfp_mask & __GFP_IO) {
-			while (shm_swap(priority, gfp_mask)) {
+			while (shm_swap(priority, gfp_mask, zone)) {
 				if (!--count)
 					goto done;
 			}
 		}
 
 		/* Then, try to page stuff out.. */
-		while (swap_out(priority, gfp_mask)) {
+		while (swap_out(priority, gfp_mask, zone)) {
 			if (!--count)
 				goto done;
 		}
@@ -506,7 +505,7 @@
 			   allocations (not GFP_HIGHMEM ones). */
 			if (nr_free_buffer_pages() >= freepages.high)
 				break;
-			if (!do_try_to_free_pages(GFP_KSWAPD))
+			if (!do_try_to_free_pages(GFP_KSWAPD, 0))
 				break;
 			run_task_queue(&tq_disk);
 		} while (!tsk->need_resched);
@@ -530,13 +529,13 @@
  * can be done by just dropping cached pages without having
  * any deadlock issues.
  */
-int try_to_free_pages(unsigned int gfp_mask)
+int try_to_free_pages(unsigned int gfp_mask, zone_t *zone)
 {
 	int retval = 1;
 
 	wake_up_process(kswapd_process);
 	if (gfp_mask & __GFP_WAIT)
-		retval = do_try_to_free_pages(gfp_mask);
+		retval = do_try_to_free_pages(gfp_mask, zone);
 	return retval;
 }