[PATCH] f2fs: Use mapping->gfp_mask to get file cache for writing

Jiucheng Xu via B4 Relay
2025-09-18T03:32:52Z

From: Jiucheng Xu <jiucheng.xu@amlogic.com>

On 32-bit architectures, when GFP_NOFS is used, the file cache for write
operations cannot be allocated from the highmem and CMA.

Since mapping->gfp_mask is set to GFP_HIGHUSER_MOVABLE during inode
allocation, using mapping_gfp_mask(mapping) as the GFP flag of getting file
cache for writing is more efficient for 32-bit architectures.

Signed-off-by: Jiucheng Xu <jiucheng.xu@amlogic.com>
---
fs/f2fs/data.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 7961e0ddfca3aaa332b7dbd4985ae7766551834f..9fbc41f9accb2626da22754f1a424da4805ca823 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3587,7 +3587,8 @@ static int f2fs_write_begin(const struct kiocb *iocb,
* Will wait that below with our IO control.
*/
folio = __filemap_get_folio(mapping, index,
- FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
+ FGP_LOCK | FGP_WRITE | FGP_CREAT,
+ mapping_gfp_mask(mapping));
if (IS_ERR(folio)) {
err = PTR_ERR(folio);
goto fail;

---
base-commit: c872b6279cd26762339ff02513e2a3f16149a6f1
change-id: 20250910-origin-dev-8a5ff6bee1f2

Best regards,
--
Jiucheng Xu <jiucheng.xu@amlogic.com>