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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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Makefile	[PATCH] V5 ia64 SPARSEMEM - Kconfig and Makefile	20 years ago
contig.c	[PATCH] V5 ia64 SPARSEMEM - eliminate contig_page_data	20 years ago
discontig.c	[PATCH] memory hotplug locking: node_size_lock	20 years ago
extable.c	Linux-2.6.12-rc2	20 years ago
fault.c	[PATCH] mm: ia64 use expand_upwards	20 years ago
hugetlbpage.c	[IA64] Rationalise Region Definitions	20 years ago
init.c	[PATCH] mm: init_mm without ptlock	20 years ago
numa.c	[PATCH] V5 ia64 SPARSEMEM - SPARSEMEM code changes	20 years ago
tlb.c	[PATCH] mm: flush_tlb_range outside ptlock	20 years ago