The write hint needs to be copied to the mapped filesystem so it can be passed down to the nvme device driver. v2: fix tabs in the email Signed-off-by: Michael Moy <michael.moy@xxxxxxxxxxxxxx> --- mm/filemap.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/mm/filemap.c b/mm/filemap.c index 870971e..f9849b8 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -3008,6 +3008,16 @@ ssize_t generic_perform_write(struct file *file, break; } + /* + * Copy a write hint to the mapped filesystem. + * + * Use the File hint first, inode next. + */ + if (file->f_write_hint) + mapping->host->i_write_hint = file->f_write_hint; + else if (file->f_inode->i_write_hint) + mapping->host->i_write_hint = file->f_inode->i_write_hint; + status = a_ops->write_begin(file, mapping, pos, bytes, flags, &page, &fsdata); if (unlikely(status < 0)) -- 1.8.3.1
