On 01/09/2018 09:43 PM, Michal Hocko wrote: > On Tue 09-01-18 17:18:38, Anshuman Khandual wrote: >> On 01/09/2018 03:42 AM, Michael Ellerman wrote: >>> Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx> writes: >>> >>>> 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. >>> >>> So what does readelf -a of /bin/sed look like? >> >> Please find here. > > Did you manage to catch _who_ is requesting that anonymous mapping? Do > you need a help with the debugging patch? Not yet, will get back on this. -- 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>
