The patch titled
call mm/page-writeback.c:set_ratelimit() when new pages are hot-added
has been removed from the -mm tree. Its filename is
call-mm-page-writebackcset_ratelimit-when-new-pages.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: call mm/page-writeback.c:set_ratelimit() when new pages are hot-added
From: Chandra Seetharaman <sekharan@xxxxxxxxxx>
ratelimit_pages in page-writeback.c is recalculated (in set_ratelimit())
every time a CPU is hot-added/removed. But this value is not recalculated
when new pages are hot-added.
This patch fixes that problem by calling set_ratelimit() when new pages
are hot-added.
[akpm@xxxxxxxx: cleanups]
Signed-off-by: Chandra Seetharaman <sekharan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/writeback.h | 1 +
mm/memory_hotplug.c | 2 ++
mm/page-writeback.c | 6 +++---
3 files changed, 6 insertions(+), 3 deletions(-)
diff -puN include/linux/writeback.h~call-mm-page-writebackcset_ratelimit-when-new-pages include/linux/writeback.h
--- a/include/linux/writeback.h~call-mm-page-writebackcset_ratelimit-when-new-pages
+++ a/include/linux/writeback.h
@@ -117,6 +117,7 @@ int sync_page_range(struct inode *inode,
int sync_page_range_nolock(struct inode *inode, struct address_space *mapping,
loff_t pos, loff_t count);
void set_page_dirty_balance(struct page *page);
+void writeback_set_ratelimit(void);
/* pdflush.c */
extern int nr_pdflush_threads; /* Global so it can be exported to sysctl
diff -puN mm/memory_hotplug.c~call-mm-page-writebackcset_ratelimit-when-new-pages mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~call-mm-page-writebackcset_ratelimit-when-new-pages
+++ a/mm/memory_hotplug.c
@@ -13,6 +13,7 @@
#include <linux/compiler.h>
#include <linux/module.h>
#include <linux/pagevec.h>
+#include <linux/writeback.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <linux/cpu.h>
@@ -192,6 +193,7 @@ int online_pages(unsigned long pfn, unsi
if (need_zonelists_rebuild)
build_all_zonelists();
vm_total_pages = nr_free_pagecache_pages();
+ writeback_set_ratelimit();
return 0;
}
diff -puN mm/page-writeback.c~call-mm-page-writebackcset_ratelimit-when-new-pages mm/page-writeback.c
--- a/mm/page-writeback.c~call-mm-page-writebackcset_ratelimit-when-new-pages
+++ a/mm/page-writeback.c
@@ -501,7 +501,7 @@ void laptop_sync_completion(void)
* will write six megabyte chunks, max.
*/
-static void set_ratelimit(void)
+void writeback_set_ratelimit(void)
{
ratelimit_pages = vm_total_pages / (num_online_cpus() * 32);
if (ratelimit_pages < 16)
@@ -513,7 +513,7 @@ static void set_ratelimit(void)
static int __cpuinit
ratelimit_handler(struct notifier_block *self, unsigned long u, void *v)
{
- set_ratelimit();
+ writeback_set_ratelimit();
return 0;
}
@@ -546,7 +546,7 @@ void __init page_writeback_init(void)
vm_dirty_ratio = 1;
}
mod_timer(&wb_timer, jiffies + dirty_writeback_interval);
- set_ratelimit();
+ writeback_set_ratelimit();
register_cpu_notifier(&ratelimit_nb);
}
_
Patches currently in -mm which might be from sekharan@xxxxxxxxxx are
origin.patch
add-srcu-based-notifier-chains.patch
-
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