The patch titled memory hotplug: allow setting of phys_device has been removed from the -mm tree. Its filename was memory-hotplug-allow-setting-of-phys_device.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: memory hotplug: allow setting of phys_device From: Heiko Carstens <heiko.carstens@xxxxxxxxxx> /sys/devices/system/memory/memoryX/phys_device is supposed to contain the number of the physical device that the corresponding piece of memory belongs to. In case a physical device should be replaced or taken offline for whatever reason it is necessary to set all corresponding memory pieces offline. The current implementation always sets phys_device to '0' and there is no way or hook to change that. Seems like there was a plan to implement that but it wasn't finished for whatever reason. So add a weak function which architectures can override to actually set the phys_device from within add_memory_block(). Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx> Cc: Dave Hansen <haveblue@xxxxxxxxxx> Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/base/memory.c | 15 ++++++++++----- include/linux/memory.h | 2 ++ 2 files changed, 12 insertions(+), 5 deletions(-) diff -puN drivers/base/memory.c~memory-hotplug-allow-setting-of-phys_device drivers/base/memory.c --- a/drivers/base/memory.c~memory-hotplug-allow-setting-of-phys_device +++ a/drivers/base/memory.c @@ -429,12 +429,16 @@ static inline int memory_fail_init(void) * differentiation between which *physical* devices each * section belongs to... */ +int __weak arch_get_memory_phys_device(unsigned long start_pfn) +{ + return 0; +} static int add_memory_block(int nid, struct mem_section *section, - unsigned long state, int phys_device, - enum mem_add_context context) + unsigned long state, enum mem_add_context context) { struct memory_block *mem = kzalloc(sizeof(*mem), GFP_KERNEL); + unsigned long start_pfn; int ret = 0; if (!mem) @@ -443,7 +447,8 @@ static int add_memory_block(int nid, str mem->phys_index = __section_nr(section); mem->state = state; mutex_init(&mem->state_mutex); - mem->phys_device = phys_device; + start_pfn = section_nr_to_pfn(mem->phys_index); + mem->phys_device = arch_get_memory_phys_device(start_pfn); ret = register_memory(mem, section); if (!ret) @@ -515,7 +520,7 @@ int remove_memory_block(unsigned long no */ int register_new_memory(int nid, struct mem_section *section) { - return add_memory_block(nid, section, MEM_OFFLINE, 0, HOTPLUG); + return add_memory_block(nid, section, MEM_OFFLINE, HOTPLUG); } int unregister_memory_section(struct mem_section *section) @@ -548,7 +553,7 @@ int __init memory_dev_init(void) if (!present_section_nr(i)) continue; err = add_memory_block(0, __nr_to_section(i), MEM_ONLINE, - 0, BOOT); + BOOT); if (!ret) ret = err; } diff -puN include/linux/memory.h~memory-hotplug-allow-setting-of-phys_device include/linux/memory.h --- a/include/linux/memory.h~memory-hotplug-allow-setting-of-phys_device +++ a/include/linux/memory.h @@ -36,6 +36,8 @@ struct memory_block { struct sys_device sysdev; }; +int arch_get_memory_phys_device(unsigned long start_pfn); + /* These states are exposed to userspace as text strings in sysfs */ #define MEM_ONLINE (1<<0) /* exposed to userspace */ #define MEM_GOING_OFFLINE (1<<1) /* exposed to userspace */ _ Patches currently in -mm which might be from heiko.carstens@xxxxxxxxxx are origin.patch linux-next.patch vfs-introduce-fmode_neg_offset-for-allowing-negative-f_pos.patch improve-sys_personality-for-compat-architectures.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html