On Sat, Nov 09, 2024 at 10:59:19PM +0800, Guixin Liu wrote: >> if ((req->ns->file && !req->ns->buffered_io && >> bdev_write_cache(file_inode(req->ns->file)->i_sb->s_bdev)) > > Or just remove !req->ns->buffered_io check? All file backend return > > support vwc. Yes, that is the right thing to do.