linux-stable.git/fs/f2fs/segment.c, branch v6.18

f2fs: allocate HOT_DATA for IPU writes

2025-09-02T20:16:04+00:00

Let's split IPU writes in hot data area to improve the GC efficiency.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Use allocate_section_policy to control write priority in multi-devices setups

2025-08-29T20:48:47+00:00

Introduces two new sys nodes: allocate_section_hint and
allocate_section_policy. The allocate_section_hint identifies the boundary
between devices, measured in sections; it defaults to the end of the device
for single storage setups, and the end of the first device for multiple
storage setups. The allocate_section_policy determines the write strategy,
with a default value of 0 for normal sequential write strategy. A value of
1 prioritizes writes before the allocate_section_hint, while a value of 2
prioritizes writes after it.

This strategy addresses the issue where, despite F2FS supporting multiple
devices, SOC vendors lack multi-devices support (currently only supporting
zoned devices). As a workaround, multiple storage devices are mapped to a
single dm device. Both this workaround and the F2FS multi-devices solution
may require prioritizing writing to certain devices, such as a device with
better performance or when switching is needed due to performance
degradation near a device's end. For scenarios with more than two devices,
sort them at mount time to utilize this feature.

When using this feature with a single storage device, it has almost no
impact. However, for configurations where multiple storage devices are
mapped to the same dm device using F2FS, utilizing this feature can provide
some optimization benefits. Therefore, I believe it should not be limited
to just multi-devices usage.

Signed-off-by: Liao Yuanhong 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: add error checking in do_write_page()

2025-08-11T17:03:27+00:00

Otherwise, the filesystem may unaware of potential file corruption.

Signed-off-by: mason.zhang 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Pass a folio to f2fs_submit_merged_write_cond()

2025-07-22T15:58:05+00:00

Most callers pass NULL, and the one that passes a page already has a
folio.  Also convert __submit_merged_write_cond() to take a folio.

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Pass a folio to ADDRS_PER_PAGE()

2025-07-22T15:56:59+00:00

All callers now have a folio so pass it in.

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Pass a folio to IS_DNODE()

2025-07-22T15:56:50+00:00

All callers now have a folio so pass it in.

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Pass a folio to is_cold_node()

2025-07-22T15:56:45+00:00

All callers now have a folio so pass it in.

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Add fio->folio

2025-07-22T15:56:39+00:00

Put fio->page insto a union with fio->folio.  This lets us remove a
lot of folio->page and page->folio conversions.

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Pass a folio to fill_node_footer_blkaddr()

2025-07-22T15:56:14+00:00

The only caller has a folio so pass it in.

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Pass a folio to f2fs_inode_chksum_set()

2025-07-22T15:56:06+00:00

All callers have a folio so pass it in.

Signed-off-by: Matthew Wilcox (Oracle) 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim