On Wed, 6 Apr 2016 15:45:10 +0200 Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> wrote: > This patchset continues the work I started with: > > commit 31bc3858ea3ebcc3157b3f5f0e624c5962f5a7a6 > Author: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > Date: Tue Mar 15 14:56:48 2016 -0700 > > memory-hotplug: add automatic onlining policy for the newly added memory > > Initially I was going to stop there and bring the policy setting logic to > userspace. I met two issues on this way: > > 1) It is possible to have memory hotplugged at boot (e.g. with QEMU). These > blocks stay offlined if we turn the onlining policy on by userspace. > > 2) My attempt to bring this policy setting to systemd failed, systemd > maintainers suggest to change the default in kernel or ... to use tmpfiles.d > to alter the policy (which looks like a hack to me): > https://github.com/systemd/systemd/pull/2938 That discussion really didn't come to a conclusion and I don't understand why you consider Lennert's "recommended way" to be a hack? > Here I suggest to add a config option to set the default value for the policy > and a kernel command line parameter to make the override. But the patchset looks pretty reasonable regardless of the above. -- 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>