On 01/07/2018 04:56 PM, Michael Ellerman wrote: > Michal Hocko <mhocko@xxxxxxxxxx> writes: > >> On Sun 07-01-18 12:19:32, Anshuman Khandual wrote: >>> On 01/05/2018 02:16 PM, Michal Hocko wrote: >> [...] >>>> Could you give us more information about the failure please. Debugging >>>> patch from http://lkml.kernel.org/r/20171218091302.GL16951@xxxxxxxxxxxxxx >>>> should help to see what is the clashing VMA. >>> Seems like its re-requesting the same mapping again. >> It always seems to be the same mapping which is a bit strange as we >> have multiple binaries here. Are these binaries any special? Does this >> happen to all bianries (except for init which has obviously started >> successfully)? Could you add an additional debugging (at the do_mmap >> layer) to see who is requesting the mapping for the first time? >> >>> [ 23.423642] 9148 (sed): Uhuuh, elf segment at 0000000010030000 requested but the memory is mapped already >>> [ 23.423706] requested [10030000, 10040000] mapped [10030000, 10040000] 100073 anon >> I also find it a bit unexpected that this is an anonymous mapping >> because the elf loader should always map a file backed one. > Anshuman what machine is this on, and what distro and toolchain is it running? > > I don't see this on any of my machines, so I wonder if this is > toolchain/distro specific. POWER9, RHEL 7.4, gcc (GCC) 4.8.5 20150623, GNU Make 3.82 etc.
