From: Hugh Dickins <hugh@veritas.com>
Date: Sun, 30 Oct 2005 01:16:14 +0000 (-0700)
Subject: [PATCH] mm: zap_pte_range dec rss
X-Git-Tag: v2.6.15-rc1~730^2^2~52
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=86d912f41dca32eca8827f2f878139735e69dc28;p=linux-2.6

[PATCH] mm: zap_pte_range dec rss

Small adjustment: zap_pte_range decrement its rss counts from 0 then finally
add, avoiding negations - we don't have or need a sub_mm_rss.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/mm/memory.c b/mm/memory.c
index 7893eb4bb8..bc6296398f 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -609,13 +609,13 @@ static void zap_pte_range(struct mmu_gather *tlb,
 				set_pte_at(mm, addr, pte,
 					   pgoff_to_pte(page->index));
 			if (PageAnon(page))
-				anon_rss++;
+				anon_rss--;
 			else {
 				if (pte_dirty(ptent))
 					set_page_dirty(page);
 				if (pte_young(ptent))
 					mark_page_accessed(page);
-				file_rss++;
+				file_rss--;
 			}
 			page_remove_rmap(page);
 			tlb_remove_page(tlb, page);
@@ -632,7 +632,7 @@ static void zap_pte_range(struct mmu_gather *tlb,
 		pte_clear_full(mm, addr, pte, tlb->fullmm);
 	} while (pte++, addr += PAGE_SIZE, addr != end);
 
-	add_mm_rss(mm, -file_rss, -anon_rss);
+	add_mm_rss(mm, file_rss, anon_rss);
 	pte_unmap(pte - 1);
 }