[PATCH 09/13] f2fs: add support in f2fs to handle multiple writeback contexts

Kundan Kumar
2025-05-29T11:34:10Z

Add support to handle multiple writeback contexts and check for
dirty_exceeded across all the writeback contexts.

Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com>
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
---
fs/f2fs/node.c | 11 +++++++----
fs/f2fs/segment.h | 7 +++++--
2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 4b6568cd5bef..19f208d6c6d3 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -50,6 +50,7 @@ bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type)
unsigned long avail_ram;
unsigned long mem_size = 0;
bool res = false;
+ struct bdi_writeback_ctx *bdi_wb_ctx;

if (!nm_i)
return true;
@@ -73,8 +74,9 @@ bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type)
if (excess_cached_nats(sbi))
res = false;
} else if (type == DIRTY_DENTS) {
- if (sbi->sb->s_bdi->wb_ctx_arr[0]->wb.dirty_exceeded)
- return false;
+ for_each_bdi_wb_ctx(sbi->sb->s_bdi, bdi_wb_ctx)
+ if (bdi_wb_ctx->wb.dirty_exceeded)
+ return false;
mem_size = get_pages(sbi, F2FS_DIRTY_DENTS);
res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
} else if (type == INO_ENTRIES) {
@@ -114,8 +116,9 @@ bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type)
res = false;
#endif
} else {
- if (!sbi->sb->s_bdi->wb_ctx_arr[0]->wb.dirty_exceeded)
- return true;
+ for_each_bdi_wb_ctx(sbi->sb->s_bdi, bdi_wb_ctx)
+ if (bdi_wb_ctx->wb.dirty_exceeded)
+ return false;
}
return res;
}
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index a525ccd4cfc8..2eea08549d73 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -936,8 +936,11 @@ static inline bool sec_usage_check(struct f2fs_sb_info *sbi, unsigned int secno)
*/
static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type)
{
- if (sbi->sb->s_bdi->wb_ctx_arr[0]->wb.dirty_exceeded)
- return 0;
+ struct bdi_writeback_ctx *bdi_wb_ctx;
+
+ for_each_bdi_wb_ctx(sbi->sb->s_bdi, bdi_wb_ctx)
+ if (bdi_wb_ctx->wb.dirty_exceeded)
+ return 0;

if (type == DATA)
return BLKS_PER_SEG(sbi);
--
2.25.1