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af2cf278ef
linux/arch/x86
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Ingo Molnar af2cf278ef x86/mm/hotplug: Don't remove PGD entries in remove_pagetable() 
So when memory hotplug removes a piece of physical memory from pagetable
mappings, it also frees the underlying PGD entry.

This complicates PGD management, so don't do this. We can keep the
PGD mapped and the PUD table all clear - it's only a single 4K page
per 512 GB of memory hotplugged.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <Waiman.Long@hp.com>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/064ff6c7275734537f969e876f6cd0baa954d2cc.1468527351.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15 10:26:24 +02:00
..
boot Merge branch 'x86/asm' into x86/mm, to resolve conflicts 2016-07-15 10:26:04 +02:00
configs arch/defconfig: remove CONFIG_RESOURCE_COUNTERS 2016-05-23 17:04:14 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-05-20 10:25:16 -07:00
entry Merge branch 'x86/asm' into x86/mm, to resolve conflicts 2016-07-15 10:26:04 +02:00
events x86/perf/intel/rapl: Fix module name collision with powercap intel-rapl 2016-07-06 12:51:59 +02:00
ia32 mm: remove more IS_ERR_VALUE abuses 2016-05-27 15:57:31 -07:00
include Merge branch 'x86/asm' into x86/mm, to resolve conflicts 2016-07-15 10:26:04 +02:00
kernel Merge branch 'linus' into x86/asm, to pick up fixes before merging new changes 2016-07-09 10:43:49 +02:00
kvm KVM: nVMX: VMX instructions: fix segment checks when L1 is in long mode. 2016-06-27 15:30:44 +02:00
lguest x86/paravirt: Remove paravirt_enabled() 2016-04-22 10:29:07 +02:00
lib x86/hweight: Get rid of the special calling convention 2016-06-08 15:01:02 +02:00
math-emu
mm x86/mm/hotplug: Don't remove PGD entries in remove_pagetable() 2016-07-15 10:26:24 +02:00
net bpf, x86: add support for constant blinding 2016-05-16 13:49:32 -04:00
oprofile x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage 2016-04-13 11:37:41 +02:00
pci Revert "ACPI, PCI, IRQ: remove redundant code in acpi_irq_penalty_init()" 2016-07-02 01:38:34 +02:00
platform x86/efi: get rid of superfluous __GFP_REPEAT 2016-06-24 17:23:52 -07:00
power x86/power/64: Fix kernel text mapping corruption during image restoration 2016-06-30 23:57:15 +02:00
purgatory kbuild: delete unnecessary "@:" 2016-04-20 10:36:57 +02:00
ras x86/RAS: Add SMCA support to AMD Error Injector 2016-05-12 09:08:23 +02:00
realmode kbuild: delete unnecessary "@:" 2016-04-20 10:36:57 +02:00
tools x86/KASLR: Clean up unused code from old 'run_size' and rename it to 'kernel_total_size' 2016-04-29 11:03:30 +02:00
um Merge branch 'for-linus-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml 2016-05-27 18:54:59 -07:00
video
xen Merge branch 'linus' into x86/asm, to pick up fixes before merging new changes 2016-07-09 10:43:49 +02:00
.gitignore
Kbuild
Kconfig Merge branch 'linus' into x86/asm, to pick up fixes before merging new changes 2016-07-09 10:43:49 +02:00
Kconfig.cpu
Kconfig.debug
Makefile x86/init: Rename EBDA code file 2016-04-22 10:29:07 +02:00
Makefile_32.cpu
Makefile.um