diff options
| author | Chi Zhiling <chizhiling@kylinos.cn> | 2026-05-11 17:40:07 +0800 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-05-11 15:35:03 +0200 |
| commit | ecf22101ba7a398eb1aefbb4eaba5fdddf7b08e4 (patch) | |
| tree | 9ab4aaf3db195bf43b5ac54a924e695872d3fe11 | |
| parent | bd6a1379a41acfc38edf15e2c15aecb0694a7fba (diff) | |
iomap: add dirty page control to iomap_zero_iter
This patch prepares the iomap framework for exFAT's upcoming migration to
iomap. During testing of the exFAT iomap branch with xfstests generic/299 on
a VM with 8GB RAM and a 40GB disk, system unresponsiveness was observed.
iomap_zero_iter() lacked dirty page throttling, which could cause memory
pressure when exFAT's valid_size mechanism triggers large-scale zeroing
operations during writes beyond valid_size.
Align iomap_zero_iter() with iomap_write_iter() by adding
balance_dirty_pages_ratelimited() to throttle dirty page generation during
large zeroing operations
Signed-off-by: Chi Zhiling <chizhiling@kylinos.cn>
Link: https://patch.msgid.link/20260511094007.728011-1-chizhiling@163.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
| -rw-r--r-- | fs/iomap/buffered-io.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index d7b648421a70..437a7c527c4a 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1543,6 +1543,8 @@ static int iomap_zero_iter(struct iomap_iter *iter, bool *did_zero, size_t offset; bool ret; + balance_dirty_pages_ratelimited(iter->inode->i_mapping); + bytes = min_t(u64, SIZE_MAX, bytes); status = iomap_write_begin(iter, write_ops, &folio, &offset, &bytes); |