From: Christoph Lameter <christoph@engr.sgi.com>
To: akpm@osdl.org
Cc: linux-mm@vger.kernel.org, npiggin@suse.de
Subject: zoned VM stats: Remove nr_mapped from zone reclaim
Date: Fri, 9 Jun 2006 11:22:52 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0606091121580.520@schroedinger.engr.sgi.com> (raw)
We can now access the number of mapped state in an inexpensive
way in shrink_active_list. So drop the nr_mapped field from
scan_control.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Index: linux-2.6.17-rc6-mm1/mm/vmscan.c
===================================================================
--- linux-2.6.17-rc6-mm1.orig/mm/vmscan.c 2006-06-09 10:30:52.044367475 -0700
+++ linux-2.6.17-rc6-mm1/mm/vmscan.c 2006-06-09 11:14:02.891680453 -0700
@@ -48,8 +48,6 @@ struct scan_control {
/* Incremented by the number of inactive pages that were scanned */
unsigned long nr_scanned;
- unsigned long nr_mapped; /* From page_state */
-
/* This context's GFP mask */
gfp_t gfp_mask;
@@ -749,7 +747,7 @@ static void shrink_active_list(unsigned
* how much memory
* is mapped.
*/
- mapped_ratio = (sc->nr_mapped * 100) / vm_total_pages;
+ mapped_ratio = global_page_state(NR_MAPPED) / vm_total_pages;
/*
* Now decide how much we really want to unmap some pages. The
@@ -997,7 +995,6 @@ unsigned long try_to_free_pages(struct z
}
for (priority = DEF_PRIORITY; priority >= 0; priority--) {
- sc.nr_mapped = global_page_state(NR_MAPPED);
sc.nr_scanned = 0;
if (!priority)
disable_swap_token();
@@ -1082,7 +1079,6 @@ loop_again:
total_scanned = 0;
nr_reclaimed = 0;
sc.may_writepage = !laptop_mode,
- sc.nr_mapped = global_page_state(NR_MAPPED);
inc_page_state(pageoutrun);
@@ -1417,7 +1413,6 @@ unsigned long shrink_all_memory(unsigned
for (prio = DEF_PRIORITY; prio >= 0; prio--) {
unsigned long nr_to_scan = nr_pages - ret;
- sc.nr_mapped = global_page_state(NR_MAPPED);
sc.nr_scanned = 0;
ret += shrink_all_zones(nr_to_scan, prio, pass, &sc);
@@ -1554,7 +1549,6 @@ static int __zone_reclaim(struct zone *z
struct scan_control sc = {
.may_writepage = !!(zone_reclaim_mode & RECLAIM_WRITE),
.may_swap = !!(zone_reclaim_mode & RECLAIM_SWAP),
- .nr_mapped = global_page_state(NR_MAPPED),
.swap_cluster_max = max_t(unsigned long, nr_pages,
SWAP_CLUSTER_MAX),
.gfp_mask = gfp_mask,
--
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reply other threads:[~2006-06-09 20:47 UTC|newest]
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