diff options
Diffstat (limited to 'mm/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 644bcb665773..0372411f38fc 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2111,6 +2111,25 @@ void account_page_dirtied(struct page *page, struct address_space *mapping) EXPORT_SYMBOL(account_page_dirtied); /* + * Helper function for deaccounting dirty page without writeback. + * + * Doing this should *normally* only ever be done when a page + * is truncated, and is not actually mapped anywhere at all. However, + * fs/buffer.c does this when it notices that somebody has cleaned + * out all the buffers on a page without actually doing it through + * the VM. Can you say "ext3 is horribly ugly"? Thought you could. + */ +void account_page_cleaned(struct page *page, struct address_space *mapping) +{ + if (mapping_cap_account_dirty(mapping)) { + dec_zone_page_state(page, NR_FILE_DIRTY); + dec_bdi_stat(inode_to_bdi(mapping->host), BDI_RECLAIMABLE); + task_io_account_cancelled_write(PAGE_CACHE_SIZE); + } +} +EXPORT_SYMBOL(account_page_cleaned); + +/* * For address_spaces which do not use buffers. Just tag the page as dirty in * its radix tree. * |