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Tang Chen e8d1955258 acpi, memory-hotplug: parse SRAT before memblock is ready ... On linux, the pages used by kernel could not be migrated. As a result, if a memory range is used by kernel, it cannot be hot-removed. So if we want to hot-remove memory, we should prevent kernel from using it. The way now used to prevent this is specify a memory range by movablemem_map boot option and set it as ZONE_MOVABLE. But when the system is booting, memblock will allocate memory, and reserve the memory for kernel. And before we parse SRAT, and know the node memory ranges, memblock is working. And it may allocate memory in ranges to be set as ZONE_MOVABLE. This memory can be used by kernel, and never be freed. So, let's parse SRAT before memblock is called first. And it is early enough. The first call of memblock_find_in_range_node() is in: setup_arch() |-->setup_real_mode() so, this patch add a function early_parse_srat() to parse SRAT, and call it before setup_real_mode() is called. NOTE: 1) early_parse_srat() is called before numa_init(), and has initialized numa_meminfo. So DO NOT clear numa_nodes_parsed in numa_init() and DO NOT zero numa_meminfo in numa_init(), otherwise we will lose memory numa info. 2) I don't know why using count of memory affinities parsed from SRAT as a return value in original acpi_numa_init(). So I add a static variable srat_mem_cnt to remember this count and use it as the return value of the new acpi_numa_init() [mhocko@suse.cz: parse SRAT before memblock is ready fix] Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by: Wen Congyang <wency@cn.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Jianguo Wu <wujianguo@huawei.com> Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Wu Jianguo <wujianguo@huawei.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Len Brown <lenb@kernel.org> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		12 years ago
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acpica	ACPICA: Update predefined info table for _MLS method	12 years ago
apei	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	12 years ago
Kconfig	Driver core patches for 3.9-rc1	12 years ago
Makefile	ACPI: add support for CSRT table	12 years ago
ac.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
acpi_i2c.c	i2c / ACPI: add ACPI enumeration support	12 years ago
acpi_ipmi.c	IPMI/ACPI: Add the IPMI opregion driver to enable ACPI to access BMC controller	14 years ago
acpi_memhotplug.c	memory-hotplug: remove sysfs file of node	12 years ago
acpi_pad.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
acpi_platform.c	ACPI / platform: Use struct acpi_scan_handler for creating devices	12 years ago
battery.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
bgrt.c	efi: Fix the ACPI BGRT driver for images located in EFI boot services memory	13 years ago
blacklist.c	acpi: delete module.h include from files explicitly not needing it	13 years ago
bus.c	ACPI / PM: Move device power management functions to device_pm.c	12 years ago
button.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
cm_sbs.c	…
container.c	ACPI / hotplug: Fix concurrency issues and memory leaks	12 years ago
csrt.c	ACPI: add support for CSRT table	12 years ago
custom_method.c	ACPI: fix obsolete comment in custom_method.c	12 years ago
debugfs.c	acpi: add export.h to files using THIS_MODULE/EXPORT_SYMBOL	13 years ago
device_pm.c	Merge branch 'acpi-scan'	12 years ago
dock.c	ACPI / hotplug: Fix concurrency issues and memory leaks	12 years ago
ec.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
ec_sys.c	simple_open: automatically convert to simple_open()	13 years ago
event.c	acpi: add export.h to files using THIS_MODULE/EXPORT_SYMBOL	13 years ago
fan.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
glue.c	Merge branch 'acpi-assorted'	12 years ago
hed.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
internal.h	ACPI / scan: Make container driver use struct acpi_scan_handler	12 years ago
numa.c	acpi, memory-hotplug: parse SRAT before memblock is ready	12 years ago
nvs.c	ACPI / PM: print physical addresses consistently with other parts of kernel	13 years ago
osl.c	Merge branch 'pm-assorted'	12 years ago
pci_irq.c	PCI changes for the v3.8 merge window:	12 years ago
pci_link.c	ACPI / PCI: Make PCI IRQ link driver use struct acpi_scan_handler	12 years ago
pci_root.c	ACPI / PCI: Make PCI root driver use struct acpi_scan_handler	12 years ago
pci_slot.c	ACPI / PCI: pci_slot: replace printk(KERN_xxx) with pr_xxx()	12 years ago
power.c	ACPI / PM: Fix consistency check for power resources during resume	12 years ago
proc.c	ACPI / PM: Fix /proc/acpi/wakeup for devices w/o bus or parent	12 years ago
processor_core.c	cpufreq / ACPI: Fix not loading acpi-cpufreq driver regression	13 years ago
processor_driver.c	cpu-hotplug, memory-hotplug: try offlining the node when hotremoving a cpu	12 years ago
processor_idle.c	Merge branch 'misc' into release	12 years ago
processor_perflib.c	ACPI: Check MSR valid bit before using P-state frequencies	12 years ago
processor_thermal.c	ACPI: Do cpufreq clamping for throttling per package v2	13 years ago
processor_throttling.c	ACPI throttling: fix endian bug in acpi_read_throttling_status()	13 years ago
reboot.c	Revert "ACPI: ignore FADT reset-reg-sup flag"	13 years ago
resource.c	ACPI: remove unnecessary INIT_LIST_HEAD	12 years ago
sbs.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
sbshc.c	ACPI: Remove useless type argument of driver .remove() operation	12 years ago
sbshc.h	…
scan.c	Merge branch 'acpi-cleanup'	12 years ago
sleep.c	Merge branch 'acpi-assorted'	12 years ago
sleep.h	ACPI: Drop power resources driver	12 years ago
sysfs.c	ACPI sysfs: remove unnecessary newline from exception	12 years ago
tables.c	ACPICA: Cleanup table handler naming conflicts.	12 years ago
thermal.c	Merge branch 'acpi-assorted'	12 years ago
utils.c	ACPI: Add acpi_handle_<level>() interfaces	12 years ago
video.c	Merge branch 'acpi-assorted'	12 years ago
video_detect.c	ACPI / video: Add "Asus UL30VT" to ACPI video detect blacklist	12 years ago
wakeup.c	ACPI / Wakeup: Enable button GPEs unconditionally during initialization	14 years ago