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mm: exporting account_page_dirty

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This allows code outside of the mm core to safely manipulate page state
and not worry about the other accounting. Not using these routines means
that some code will lose track of the accounting and we get bugs. This
has happened once already.

Signed-off-by: Michael Rubin <mrubin@google.com>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Michael Rubin 2010-08-20 02:31:26 -07:00 committed by Sage Weil
parent eb6bb1c5bd
commit 679ceace84
2 changed files with 2 additions and 7 deletions
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8
fs/ceph/addr.c
View File

@ -105,13 +105,7 @@ static int ceph_set_page_dirty(struct page *page)
spin_lock_irq(&mapping->tree_lock);
if (page->mapping) { /* Race with truncate? */
WARN_ON_ONCE(!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, page->mapping);
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);

1
mm/page-writeback.c
View File

@ -1096,6 +1096,7 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
task_io_account_write(PAGE_CACHE_SIZE);
}
}
EXPORT_SYMBOL(account_page_dirtied);
/*
* For address_spaces which do not use buffers. Just tag the page as dirty in