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Gary Hade c04fc586c1 mm: show node to memory section relationship with symlinks in sysfs ... Show node to memory section relationship with symlinks in sysfs Add /sys/devices/system/node/nodeX/memoryY symlinks for all the memory sections located on nodeX. For example: /sys/devices/system/node/node1/memory135 -> ../../memory/memory135 indicates that memory section 135 resides on node1. Also revises documentation to cover this change as well as updating Documentation/ABI/testing/sysfs-devices-memory to include descriptions of memory hotremove files 'phys_device', 'phys_index', and 'state' that were previously not described there. In addition to it always being a good policy to provide users with the maximum possible amount of physical location information for resources that can be hot-added and/or hot-removed, the following are some (but likely not all) of the user benefits provided by this change. Immediate: - Provides information needed to determine the specific node on which a defective DIMM is located. This will reduce system downtime when the node or defective DIMM is swapped out. - Prevents unintended onlining of a memory section that was previously offlined due to a defective DIMM. This could happen during node hot-add when the user or node hot-add assist script onlines _all_ offlined sections due to user or script inability to identify the specific memory sections located on the hot-added node. The consequences of reintroducing the defective memory could be ugly. - Provides information needed to vary the amount and distribution of memory on specific nodes for testing or debugging purposes. Future: - Will provide information needed to identify the memory sections that need to be offlined prior to physical removal of a specific node. Symlink creation during boot was tested on 2-node x86_64, 2-node ppc64, and 2-node ia64 systems. Symlink creation during physical memory hot-add tested on a 2-node x86_64 system. Signed-off-by: Gary Hade <garyhade@us.ibm.com> Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		16 years ago
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Makefile	[PATCH] ia64: ioremap: check EFI for valid memory attributes	19 years ago
contig.c	[IA64] Put the space for cpu0 per-cpu area into .data section	17 years ago
discontig.c	[IA64] fix the difference between node_mem_map and node_start_pfn	16 years ago
extable.c	Remove obsolete #include <linux/config.h>	19 years ago
fault.c	[IA64] kprobes arch consolidation build fix	17 years ago
hugetlbpage.c	GRU Driver: hardware data structures	17 years ago
init.c	mm: show node to memory section relationship with symlinks in sysfs	16 years ago
ioremap.c	[IA64] make ioremap avoid unsupported attributes	18 years ago
numa.c	[IA64] Minimize per_cpu reservations.	17 years ago
tlb.c	[IA64] Fix annoying IA64_TR_ALLOC_MAX message.	17 years ago