diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2025-11-27 12:16:40 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-11-27 12:19:08 -0800 |
| commit | db4029859d6fd03f0622d394f4cdb1be86d7ec62 (patch) | |
| tree | e2e33b9c1f6bb9aea36df6ce974d698f0aaf177c /mm/huge_memory.c | |
| parent | 73f784b2c938e17e4af90aff4cdcaafe4ca06a5f (diff) | |
| parent | 1f5e808aa63af61ec0d6a14909056d6668813e86 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Conflicts:
net/xdp/xsk.c
0ebc27a4c67d ("xsk: avoid data corruption on cq descriptor number")
8da7bea7db69 ("xsk: add indirect call for xsk_destruct_skb")
30ed05adca4a ("xsk: use a smaller new lock for shared pool case")
https://lore.kernel.org/20251127105450.4a1665ec@canb.auug.org.au
https://lore.kernel.org/eb4eee14-7e24-4d1b-b312-e9ea738fefee@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 2f2a521e5d68..6cba1cb14b23 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -3619,6 +3619,16 @@ static int __folio_split(struct folio *folio, unsigned int new_order, if (folio != page_folio(split_at) || folio != page_folio(lock_at)) return -EINVAL; + /* + * Folios that just got truncated cannot get split. Signal to the + * caller that there was a race. + * + * TODO: this will also currently refuse shmem folios that are in the + * swapcache. + */ + if (!is_anon && !folio->mapping) + return -EBUSY; + if (new_order >= folio_order(folio)) return -EINVAL; @@ -3659,18 +3669,6 @@ static int __folio_split(struct folio *folio, unsigned int new_order, gfp_t gfp; mapping = folio->mapping; - - /* Truncated ? */ - /* - * TODO: add support for large shmem folio in swap cache. - * When shmem is in swap cache, mapping is NULL and - * folio_test_swapcache() is true. - */ - if (!mapping) { - ret = -EBUSY; - goto out; - } - min_order = mapping_min_folio_order(folio->mapping); if (new_order < min_order) { ret = -EINVAL; |