[PATCH] call mm/page-writeback.c:set_ratelimit() when new pages are hot-added (2d1d43f6) · Commits · 戴 / test

include/linux/writeback.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -117,6 +117,7 @@ int sync_page_range(struct inode inode, struct address_space mapping,
		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

+2 −0

Original line number	Diff line number	Diff line
		@@ -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, unsigned long nr_pages)
		if (need_zonelists_rebuild)
		build_all_zonelists();
		vm_total_pages = nr_free_pagecache_pages();
		writeback_set_ratelimit();
		return 0;
		}

+3 −3

Original line number	Diff line number	Diff line
		@@ -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);
		}