On Wed, Aug 19, 2020 at 03:58:41PM +0530, Anju T Sudhakar wrote: > From: Ritesh Harjani <riteshh@xxxxxxxxxxxxx> > > __bio_try_merge_page() may return same_page = 1 and merged = 0. > This could happen when bio->bi_iter.bi_size + len > UINT_MAX. Ummm, silly question, but exactly how are we getting a bio that large in ->writepages getting built? Even with 64kB pages, that's a bio with 2^16 pages attached to it. We shouldn't be building single bios in writeback that large - what storage hardware is allowing such huge bios to be built? (i.e. can you dump all the values in /sys/block/<dev>/queue/* for that device for us?) Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx
