usbnet: ratelimit warning messages invoked from callback handler

[safe/jmp/linux-2.6] / mm / page-writeback.c

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 6106a5c..30351f0 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -66,7 +66,7 @@ static inline long sync_writeback_pages(void)
 /*
  * Start background writeback (via pdflush) at this percentage
  */
-int dirty_background_ratio = 5;
+int dirty_background_ratio = 10;
 
 /*
  * dirty_background_bytes starts at 0 (disabled) so that it is a function of
@@ -83,7 +83,7 @@ int vm_highmem_is_dirtyable;
 /*
  * The generator of dirty data starts writeback at this percentage
  */
-int vm_dirty_ratio = 10;
+int vm_dirty_ratio = 20;
 
 /*
  * vm_dirty_bytes starts at 0 (disabled) so that it is a function of
@@ -92,14 +92,14 @@ int vm_dirty_ratio = 10;
 unsigned long vm_dirty_bytes;
 
 /*
- * The interval between `kupdate'-style writebacks, in jiffies
+ * The interval between `kupdate'-style writebacks
  */
-int dirty_writeback_interval = 5 * HZ;
+unsigned int dirty_writeback_interval = 5 * 100; /* sentiseconds */
 
 /*
- * The longest number of jiffies for which data is allowed to remain dirty
+ * The longest time for which data is allowed to remain dirty
  */
-int dirty_expire_interval = 30 * HZ;
+unsigned int dirty_expire_interval = 30 * 100; /* sentiseconds */
 
 /*
  * Flag that makes the machine dump writes/reads and block dirtyings.
@@ -240,7 +240,7 @@ void bdi_writeout_inc(struct backing_dev_info *bdi)
 }
 EXPORT_SYMBOL_GPL(bdi_writeout_inc);
 
-static inline void task_dirty_inc(struct task_struct *tsk)
+void task_dirty_inc(struct task_struct *tsk)
 {
        prop_inc_single(&vm_dirties, &tsk->dirties);
 }
@@ -770,9 +770,9 @@ static void wb_kupdate(unsigned long arg)
 
        sync_supers();
 
-       oldest_jif = jiffies - dirty_expire_interval;
+       oldest_jif = jiffies - msecs_to_jiffies(dirty_expire_interval);
        start_jif = jiffies;
-       next_jif = start_jif + dirty_writeback_interval;
+       next_jif = start_jif + msecs_to_jiffies(dirty_writeback_interval * 10);
        nr_to_write = global_page_state(NR_FILE_DIRTY) +
                        global_page_state(NR_UNSTABLE_NFS) +
                        (inodes_stat.nr_inodes - inodes_stat.nr_unused);
@@ -801,9 +801,10 @@ static void wb_kupdate(unsigned long arg)
 int dirty_writeback_centisecs_handler(ctl_table *table, int write,
        struct file *file, void __user *buffer, size_t *length, loff_t *ppos)
 {
-       proc_dointvec_userhz_jiffies(table, write, file, buffer, length, ppos);
+       proc_dointvec(table, write, file, buffer, length, ppos);
        if (dirty_writeback_interval)
-               mod_timer(&wb_timer, jiffies + dirty_writeback_interval);
+               mod_timer(&wb_timer, jiffies +
+                       msecs_to_jiffies(dirty_writeback_interval * 10));
        else
                del_timer(&wb_timer);
        return 0;
@@ -905,7 +906,8 @@ void __init page_writeback_init(void)
 {
        int shift;
 
-       mod_timer(&wb_timer, jiffies + dirty_writeback_interval);
+       mod_timer(&wb_timer,
+                 jiffies + msecs_to_jiffies(dirty_writeback_interval * 10));
        writeback_set_ratelimit();
        register_cpu_notifier(&ratelimit_nb);
 
@@ -1079,7 +1081,7 @@ continue_unlock:
                pagevec_release(&pvec);
                cond_resched();
        }
-       if (!cycled) {
+       if (!cycled && !done) {
                /*
                 * range_cyclic:
                 * We hit the last page and there is more work to be done: wrap
@@ -1198,6 +1200,20 @@ int __set_page_dirty_no_writeback(struct page *page)
 }
 
 /*
+ * Helper function for set_page_dirty family.
+ * NOTE: This relies on being atomic wrt interrupts.
+ */
+void account_page_dirtied(struct page *page, struct address_space *mapping)
+{
+       if (mapping_cap_account_dirty(mapping)) {
+               __inc_zone_page_state(page, NR_FILE_DIRTY);
+               __inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
+               task_dirty_inc(current);
+               task_io_account_write(PAGE_CACHE_SIZE);
+       }
+}
+
+/*
  * For address_spaces which do not use buffers.  Just tag the page as dirty in
  * its radix tree.
  *
@@ -1226,12 +1242,7 @@ int __set_page_dirty_nobuffers(struct page *page)
                if (mapping2) { /* Race with truncate? */
                        BUG_ON(mapping2 != mapping);
                        WARN_ON_ONCE(!PagePrivate(page) && !PageUptodate(page));
-                       if (mapping_cap_account_dirty(mapping)) {
-                               __inc_zone_page_state(page, NR_FILE_DIRTY);
-                               __inc_bdi_stat(mapping->backing_dev_info,
-                                               BDI_RECLAIMABLE);
-                               task_io_account_write(PAGE_CACHE_SIZE);
-                       }
+                       account_page_dirtied(page, mapping);
                        radix_tree_tag_set(&mapping->page_tree,
                                page_index(page), PAGECACHE_TAG_DIRTY);
                }
@@ -1262,7 +1273,7 @@ EXPORT_SYMBOL(redirty_page_for_writepage);
  * If the mapping doesn't provide a set_page_dirty a_op, then
  * just fall through and assume that it wants buffer_heads.
  */
-static int __set_page_dirty(struct page *page)
+int set_page_dirty(struct page *page)
 {
        struct address_space *mapping = page_mapping(page);
 
@@ -1280,14 +1291,6 @@ static int __set_page_dirty(struct page *page)
        }
        return 0;
 }
-
-int set_page_dirty(struct page *page)
-{
-       int ret = __set_page_dirty(page);
-       if (ret)
-               task_dirty_inc(current);
-       return ret;
-}
 EXPORT_SYMBOL(set_page_dirty);
 
 /*