David Hildenbrand 5f47adf762 mm/memory_hotplug: allow to specify a default online_type ... For now, distributions implement advanced udev rules to essentially - Don't online any hotplugged memory (s390x) - Online all memory to ZONE_NORMAL (e.g., most virt environments like hyperv) - Online all memory to ZONE_MOVABLE in case the zone imbalance is taken care of (e.g., bare metal, special virt environments) In summary: All memory is usually onlined the same way, however, the kernel always has to ask user space to come up with the same answer. E.g., Hyper-V always waits for a memory block to get onlined before continuing, otherwise it might end up adding memory faster than onlining it, which can result in strange OOM situations. This waiting slows down adding of a bigger amount of memory. Let's allow to specify a default online_type, not just "online" and "offline". This allows distributions to configure the default online_type when booting up and be done with it. We can now specify "offline", "online", "online_movable" and "online_kernel" via - "memhp_default_state=" on the kernel cmdline - /sys/devices/system/memory/auto_online_blocks just like we are able to specify for a single memory block via /sys/devices/system/memory/memoryX/state Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Wei Yang <richard.weiyang@gmail.com> Reviewed-by: Baoquan He <bhe@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Wei Liu <wei.liu@kernel.org> Cc: Yumei Huang <yuhuang@redhat.com> Link: http://lkml.kernel.org/r/20200317104942.11178-9-david@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-04-07 10:43:41 -07:00
..
firmware_loader	firmware: Add new platform fallback mechanism and firmware_request_platform()	2020-03-20 14:54:04 +01:00
power	Additional power management updates for 5.7-rc1	2020-04-06 10:14:39 -07:00
regmap
test
arch_topology.c	arm64 updates for 5.7:	2020-03-31 10:05:01 -07:00
attribute_container.c
base.h
bus.c
cacheinfo.c
class.c
component.c	component: allow missing unbind callback	2020-03-18 14:13:33 +01:00
container.c
core.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-03-31 17:29:33 -07:00
cpu.c	CPU (hotplug) updates:	2020-03-30 18:06:39 -07:00
dd.c	driver core: Replace open-coded list_last_entry()	2020-03-24 13:33:26 +01:00
devcon.c
devcoredump.c
devres.c
devtmpfs.c	Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-02-08 13:26:41 -08:00
driver.c
firmware.c
hypervisor.c
init.c
isa.c
Kconfig
Makefile
map.c
memory.c	mm/memory_hotplug: allow to specify a default online_type	2020-04-07 10:43:41 -07:00
module.c
node.c	mm/sparse: rename pfn_present() to pfn_in_present_section()	2020-04-02 09:35:30 -07:00
pinctrl.c
platform-msi.c
platform.c	driver core: platform: Reimplement devm_platform_ioremap_resource	2020-03-24 12:09:40 +01:00
property.c	device property: Export fwnode_get_name()	2020-03-16 07:47:58 +01:00
soc.c
swnode.c	Revert "software node: Simplify software_node_release() function"	2020-03-04 22:31:44 +01:00
syscore.c
topology.c
transport_class.c