On Thu, Jan 28, 2021 at 2:08 PM Adam Williamson <adamwill@xxxxxxxxxxxxxxxxx> wrote: > > On Thu, 2021-01-28 at 13:46 -0700, Chris Murphy wrote: > > > > OK I'm seeing this problem in a VM with > > Fedora-Workstation-Live-x86_64-Rawhide-20210128.n.0.iso but I'm not > > sure how consistent it is yet. MemTotal is ~3G for a VM that has 4G > > allocated. Something's wrong... > > > > VM 5.11.0-0.rc5.20210127git2ab38c17aac1.136.fc34.x86_64 > > [ 0.701792] Memory: 3016992K/4190656K available (43019K kernel > > code, 11036K rwdata, 27184K rodata, 5036K init, 31780K bss, 1173408K > > reserved, 0K cma-reserved) > > > > Baremetal 5.10.11-200.fc33.x86_64 > > [ 0.125875] Memory: 12059084K/12493424K available (14345K kernel > > code, 3465K rwdata, 9704K rodata, 2536K init, 5504K bss, 434080K > > reserved, 0K cma-reserved) > > > > Why is reserved so much higher in the VM case? It clearly sees the 4G > > but is delimiting it to 3G for some reason I don't understand. This is > > well before the zram module is loaded, by the way. > > I've filed https://bugzilla.redhat.com/show_bug.cgi?id=1921923 for > this. zdzichu suggests https://lkml.org/lkml/2021/1/25/701 may be > related. I'm not sure, because Revert "mm: fix initialization of struct page for holes in memory layout" landed in 5.10.11 and I wasn't have any of these memory related issues with 5.10.10. I'm only seeing this so far with the debug kernels. Even rc5 nodebug doesn't exhibit the problem. -- Chris Murphy _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
