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Wed, 14 Oct 2026 04:26:52 -0700 (PDT) From: Seongjae Jeong To: jaegeuk@kernel.org, chao@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Seongjae Jeong Subject: [PATCH] f2fs: fix submit accounting for IPU writeback Date: Wed, 14 Oct 2026 11:26:29 +0000 Message-ID: <20261014112629.59861-1-jsjlee1020@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit f2fs_write_cache_pages() uses the submitted count, which is set to fio.submitted in f2fs_write_single_data_page(), to update nwritten and decrement wbc->nr_to_write. In the OPU path, f2fs_submit_page_write() sets fio->submitted to 1. However, in the IPU path, fio->submitted is never set and remains zero. As a result, successful IPU writes are not accounted for. This can cause asynchronous writeback to continue beyond its budget. Set fio->submitted in f2fs_inplace_write_data() after a page is successfully merged into a bio or submitted, so that successful IPU writes are included in the writeback accounting. Signed-off-by: Seongjae Jeong --- fs/f2fs/segment.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 453f9284ec86..2e19124f1463 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -4298,6 +4298,7 @@ int f2fs_inplace_write_data(struct f2fs_io_info *fio) else err = f2fs_submit_page_bio(fio); if (!err) { + fio->submitted = 1; f2fs_update_device_state(fio->sbi, fio->ino, fio->new_blkaddr, 1); f2fs_update_iostat(fio->sbi, fio_inode(fio), -- 2.53.0