Re: [s390x] New regression was found on kernel-4.16

On Mon, Apr 09, 2018 at 06:18:04PM +0800, Li Wang wrote: > Hi, > > I got this BUG_ON() on s390x platform with kernel-v4.16.0. > > [1.200196] [ cut here ] > [1.200201] kernel BUG at block/bio.c:1798! > [1.200228] illegal operation: 0001 ilc:1 [#1] SMP > [1.2

Re: [s390x] New regression was found on kernel-4.16

Hi Li Wang, On Mon, Apr 09, 2018 at 06:18:04PM +0800, Li Wang wrote: > Hi, > > I got this BUG_ON() on s390x platform with kernel-v4.16.0. Today I saw this bug too, from my first look, seems it is because that get_max_io_size() returns zero in blk_bio_segment_split(). And I trigger that in one M