On Mon, Apr 18, 2016 at 11:35:28PM +0200, Jan Kara wrote: > Currently ext2 zeroes any data blocks allocated for DAX inode however it > still returns them as BH_New. Thus DAX code zeroes them again in > dax_insert_mapping() which can possibly overwrite the data that has been > already stored to those blocks by a racing dax_io(). Avoid marking > pre-zeroed buffers as new. > > Signed-off-by: Jan Kara <jack@xxxxxxx> Reviewed-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>