On 12/26/17 at 11:28am, AKASHI Takahiro wrote: > On Tue, Dec 26, 2017 at 09:35:17AM +0800, Dave Young wrote: > > [snip] > > > > > Well, we may be able to change pr_warn() to pr_warn_once() here, but > > > > > I hope that adding "numa=off" to kernel command line should also work. > > > > > > > > Hmm, adding "numa=off" to crashkernel bootargs works, and TBH it was > > > > my initial thought process as well, but I am not sure if this will > > > > cause any regressions on aarch64 systems which use crashdump feature. > > > > > > It should be fine since we use numa=off by default for all other arches > > > ie. x86, ppc64 and s390. Actually disabling numa in kdump kernel can save > > > mm component memory usage. > > > > > > > Forgot to say I means in RHEL and Fedora we use numa=off for kdump.. > > Thank you for the clarification. > (It might be better to make numa off automatically if maxcpus == 0 (and 1?).) Hmm, I did a quick test with qemu/kvm, kdump kernel boot without numa=off I'm not sure why I do not see the warning messages on x86 machines, maybe something arm64 specific? > > -Takahiro AKASHI
