github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-03 20:14:06 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

filemap: Add a helper for filesystems implementing dropbehind

Browse Source 
Add a helper to allow filesystems to attempt to free the 'dropbehind'
folio.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Link: https://lore.kernel.org/all/5588a06f6d5a2cf6746828e2d36e7ada668b1739.1745381692.git.trond.myklebust@hammerspace.com/
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
This commit is contained in:
Trond Myklebust 2025-09-06 12:48:14 -04:00 committed by Anna Schumaker
parent cc6ac66f1c
commit 24bbd533f5
2 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/pagemap.h
View File

@ -1221,6 +1221,7 @@ void folio_wait_writeback(struct folio *folio);
int folio_wait_writeback_killable(struct folio *folio);
void end_page_writeback(struct page *page);
void folio_end_writeback(struct folio *folio);
void folio_end_dropbehind(struct folio *folio);
void folio_wait_stable(struct folio *folio);
void __folio_mark_dirty(struct folio *folio, struct address_space *, int warn);
void folio_account_cleaned(struct folio *folio, struct bdi_writeback *wb);

5
mm/filemap.c
View File

@ -1608,7 +1608,7 @@ static void filemap_end_dropbehind(struct folio *folio)
* completes. Do that now. If we fail, it's likely because of a big folio -
* just reset dropbehind for that case and latter completions should invalidate.
*/
static void filemap_end_dropbehind_write(struct folio *folio)
void folio_end_dropbehind(struct folio *folio)
{
if (!folio_test_dropbehind(folio))
return;
@ -1625,6 +1625,7 @@ static void filemap_end_dropbehind_write(struct folio *folio)
folio_unlock(folio);
}
}
EXPORT_SYMBOL_GPL(folio_end_dropbehind);
/**
* folio_end_writeback - End writeback against a folio.
@ -1660,7 +1661,7 @@ void folio_end_writeback(struct folio *folio)
if (__folio_end_writeback(folio))
folio_wake_bit(folio, PG_writeback);
filemap_end_dropbehind_write(folio);
folio_end_dropbehind(folio);
acct_reclaim_writeback(folio);
folio_put(folio);
}