lkml.org 
[lkml]   [2005]   [Sep]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 04/21] mm: zap_pte_range dont dirty anon
zap_pte_range already avoids wasting time to mark_page_accessed on anon
pages: it can also skip anon set_page_dirty - the page only needs to be
marked dirty if shared with another mm, but that will say pte_dirty too.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
---

mm/memory.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)

--- mm03/mm/memory.c 2005-09-24 19:26:38.000000000 +0100
+++ mm04/mm/memory.c 2005-09-24 19:27:05.000000000 +0100
@@ -574,12 +574,14 @@ static void zap_pte_range(struct mmu_gat
addr) != page->index)
set_pte_at(tlb->mm, addr, pte,
pgoff_to_pte(page->index));
- if (pte_dirty(ptent))
- set_page_dirty(page);
if (PageAnon(page))
dec_mm_counter(tlb->mm, anon_rss);
- else if (pte_young(ptent))
- mark_page_accessed(page);
+ else {
+ if (pte_dirty(ptent))
+ set_page_dirty(page);
+ if (pte_young(ptent))
+ mark_page_accessed(page);
+ }
tlb->freed++;
page_remove_rmap(page);
tlb_remove_page(tlb, page);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-09-25 17:52    [W:0.251 / U:0.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site