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| author | Hugh Dickins <hughd@google.com> | 2022-03-24 18:13:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-24 19:06:51 -0700 |
| commit | 566d3362885aab04d6b0f885f12db3176ca3a032 (patch) | |
| tree | 25ac4e4fd25635a26587151d6b54a90a9e86888d /mm/page-writeback.c | |
| parent | 7f7609175ff2339a2cffa48ba2474ef928d7eafd (diff) | |
| download | linux-566d3362885aab04d6b0f885f12db3176ca3a032.tar.gz | |
mm: warn on deleting redirtied only if accounted
filemap_unaccount_folio() has a WARN_ON_ONCE(folio_test_dirty(folio)). It is good to warn of late dirtying on a persistent filesystem, but late dirtying on tmpfs can only lose data which is expected to be thrown away; and it's a pity if that warning comes ONCE on tmpfs, then hides others which really matter. Make it conditional on mapping_cap_writeback(). Cleanup: then folio_account_cleaned() no longer needs to check that for itself, and so no longer needs to know the mapping. Link: https://lkml.kernel.org/r/b5a1106c-7226-a5c6-ad41-ad4832cae1f@google.com Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Jan Kara <jack@suse.de> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 435c02630593..7e2da284e427 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2465,16 +2465,14 @@ static void folio_account_dirtied(struct folio *folio, * * Caller must hold lock_page_memcg(). */ -void folio_account_cleaned(struct folio *folio, struct address_space *mapping, - struct bdi_writeback *wb) +void folio_account_cleaned(struct folio *folio, struct bdi_writeback *wb) { - if (mapping_can_writeback(mapping)) { - 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(nr * 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(nr * PAGE_SIZE); } /* @@ -2683,7 +2681,7 @@ void __folio_cancel_dirty(struct folio *folio) wb = unlocked_inode_to_wb_begin(inode, &cookie); if (folio_test_clear_dirty(folio)) - folio_account_cleaned(folio, mapping, wb); + folio_account_cleaned(folio, wb); unlocked_inode_to_wb_end(inode, &cookie); folio_memcg_unlock(folio); |