On Wed, Nov 18, 2020 at 04:54:51PM +0800, Coly Li wrote: > On 11/18/20 4:47 PM, Christoph Hellwig wrote: > > Don't bother to call lookup_bdev for just a slightly different error > > message without any functional change. > > > > Signed-off-by: Christoph Hellwig <hch@xxxxxx>ist > > Hi Christoph, > > NACK. This removing error message is frequently triggered and observed, > and distinct a busy device and an already registered device is important > (the first one is critical error and second one is not). > > Remove such error message will be a functional regression. What normal operation causes this error message to be emitted? And what can a user do with it? thanks, greg k-h