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[PATCH] call mm/page-writeback.c:set_ratelimit() when new pages are hot-added

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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.

[[email protected]: cleanups]
Signed-off-by: Chandra Seetharaman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Chandra Seetharaman 2006-09-29 02:01:25 -07:00 • committed by Linus Torvalds
commit 2d1d43f6a4
3 changed files with 6 additions and 3 deletions
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6
mm/page-writeback.c
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@ -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);
}