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Dave Hansen 208d54e551 [PATCH] memory hotplug locking: node_size_lock ... pgdat->node_size_lock is basically only neeeded in one place in the normal code: show_mem(), which is the arch-specific sysrq-m printing function. Strictly speaking, the architectures not doing memory hotplug do no need this locking in show_mem(). However, they are all included for completeness. This should also make any future consolidation of all of the implementations a little more straightforward. This lock is also held in the sparsemem code during a memory removal, as sections are invalidated. This is the place there pfn_valid() is made false for a memory area that's being removed. The lock is only required when doing pfn_valid() operations on memory which the user does not already have a reference on the page, such as in show_mem(). Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		20 years ago
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alpha	[PATCH] memory hotplug locking: node_size_lock	20 years ago
arm	[PATCH] mm: split page table lock	20 years ago
arm26	[PATCH] mm: arches skip ptlock	20 years ago
cris	[PATCH] mm: cris v32 mmu_context_lock	20 years ago
frv	[PATCH] mm: split page table lock	20 years ago
h8300	kbuild: h8300,m68knommu,sh,sh64 use generic asm-offsets.h support	20 years ago
i386	[PATCH] memory hotplug locking: node_size_lock	20 years ago
ia64	[PATCH] memory hotplug locking: node_size_lock	20 years ago
m32r	[PATCH] memory hotplug locking: node_size_lock	20 years ago
m68k	[PATCH] mm: init_mm without ptlock	20 years ago
m68knommu	…
mips	[PATCH] mm: init_mm without ptlock	20 years ago
parisc	[PATCH] memory hotplug locking: node_size_lock	20 years ago
ppc	[PATCH] mm: init_mm without ptlock	20 years ago
ppc64	[PATCH] memory hotplug locking: node_size_lock	20 years ago
s390	[PATCH] mm: init_mm without ptlock	20 years ago
sh	[PATCH] mm: i386 sh sh64 ready for split ptlock	20 years ago
sh64	[PATCH] mm: i386 sh sh64 ready for split ptlock	20 years ago
sparc	[PATCH] mm: arches skip ptlock	20 years ago
sparc64	[PATCH] mm: arches skip ptlock	20 years ago
um	[PATCH] mm: split page table lock	20 years ago
v850	[PATCH] V850: C99 initializers for hw_interrupt_type structures	20 years ago
x86_64	[PATCH] mm: init_mm without ptlock	20 years ago
xtensa	[PATCH] gfp_t: dma-mapping (xtensa)	20 years ago