On Sun, 17 Feb 2013, Jiang Liu wrote: > As reported by https://bugzilla.kernel.org/show_bug.cgi?id=53501, > "MemTotal" from /proc/meminfo means memory pages managed by the buddy > system (managed_pages), but "MemTotal" from /sys/.../node/nodex/meminfo > means phsical pages present (present_pages) within the NUMA node. > There's a difference between managed_pages and present_pages due to > bootmem allocator and reserved pages. > > So introduce a new field "MemManaged" to /sys/.../nodex/meminfo and > /proc/meminfo, so that: > MemTotal = present_pages > MemManaged = managed_pages = present_pages - reserved_pages > Nobody is asking for a MemManaged field, we're asking for consistency in MemTotal as exported by /proc/meminfo and /sys/devices/system/node/node*/meminfo. In my opinion, this should be the amount of RAM installed on the system regardless of the amount of memory reserved, i.e. the current /sys/devices/system/node/node*/meminfo semantics. There is no implicit guarantee that memory in MemTotal can be allocated by the buddy allocator. So how about we just make the MemTotal in /proc/meminfo coincide with these semantics? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>