On 07/08/2012 10:53 PM, Fengguang Wu wrote:
@@ -2245,7 +2252,10 @@ int test_set_page_writeback(struct page *page)
{
struct address_space *mapping = page_mapping(page);
int ret;
+ bool locked;
+ unsigned long flags;
+ mem_cgroup_begin_update_page_stat(page,&locked,&flags);
if (mapping) {
struct backing_dev_info *bdi = mapping->backing_dev_info;
unsigned long flags;
@@ -2272,6 +2282,8 @@ int test_set_page_writeback(struct page *page)
}
if (!ret)
account_page_writeback(page);
+
+ mem_cgroup_end_update_page_stat(page,&locked,&flags);
return ret;
}
Where is the MEM_CGROUP_STAT_FILE_WRITEBACK increased?
It's in account_page_writeback().
void account_page_writeback(struct page *page)
{
+ mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_FILE_WRITEBACK);
inc_zone_page_state(page, NR_WRITEBACK);
}
There isn't a unified interface to dec/inc writeback accounting, so
I just follow that.
Maybe we can rework account_page_writeback() to also account
dec in?
Thanks,
Sha
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