| Message ID | 20241104015016.228963-1-chao@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [f2fs-dev] f2fs: fix to avoid forcing direct write to use buffered IO on inline_data inode | expand |
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 0e7a0195eca8..377a10b81bf3 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -883,7 +883,11 @@ static bool f2fs_force_buffered_io(struct inode *inode, int rw) return true; if (f2fs_compressed_file(inode)) return true; - if (f2fs_has_inline_data(inode)) + /* + * only force direct read to use buffered IO, for direct write, + * it expects inline data conversion before committing IO. + */ + if (f2fs_has_inline_data(inode) && rw == READ) return true; /* disallow direct IO if any of devices has unaligned blksize */
Jinsu Lee reported a performance regression issue, after commit 5c8764f8679e ("f2fs: fix to force buffered IO on inline_data inode"), we forced direct write to use buffered IO on inline_data inode, it will cause performace regression due to memory copy and data flush. It's fine to not force direct write to use buffered IO, as it can convert inline inode before committing direct write IO. Fixes: 5c8764f8679e ("f2fs: fix to force buffered IO on inline_data inode") Reported-by: Jinsu Lee <jinsu1.lee@samsung.com> Closes: https://lore.kernel.org/linux-f2fs-devel/af03dd2c-e361-4f80-b2fd-39440766cf6e@kernel.org Signed-off-by: Chao Yu <chao@kernel.org> --- fs/f2fs/file.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)