Re: [PATCH v14 072/138] mm/writeback: Add folio_account_cleaned()
From: Vlastimil Babka <hidden>
Date: 2021-08-12 16:15:40
Also in:
linux-fsdevel, lkml
On 7/15/21 5:35 AM, Matthew Wilcox (Oracle) wrote:
Get the statistics right; compound pages were being accounted as a single page. This didn't matter before now as no filesystem which supported compound pages did writeback. Also move the declaration to filemap.h since this is part of the page cache. Add a wrapper for
Seems to be pagemap.h :)
account_page_cleaned(). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Vlastimil Babka <redacted> Nit below:
quoted hunk ↗ jump to hunk
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index bd97c461d499..792a83bd3917 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c@@ -2453,14 +2453,15 @@ static void folio_account_dirtied(struct folio *folio, * * Caller must hold lock_page_memcg(). */ -void account_page_cleaned(struct page *page, struct address_space *mapping, +void folio_account_cleaned(struct folio *folio, struct address_space *mapping, struct bdi_writeback *wb) { if (mapping_can_writeback(mapping)) { - dec_lruvec_page_state(page, NR_FILE_DIRTY); - dec_zone_page_state(page, NR_ZONE_WRITE_PENDING); - dec_wb_stat(wb, WB_RECLAIMABLE); - task_io_account_cancelled_write(PAGE_SIZE); + long nr = folio_nr_pages(folio); + lruvec_stat_mod_folio(folio, NR_FILE_DIRTY, -nr); + zone_stat_mod_folio(folio, NR_ZONE_WRITE_PENDING, -nr); + wb_stat_mod(wb, WB_RECLAIMABLE, -nr); + task_io_account_cancelled_write(folio_size(folio));
In "mm/writeback: Add __folio_mark_dirty()" you used nr*PAGE_SIZE. Consistency?
} }