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    Subject[RFC PATCH V6 19/19] memory-hotplug: remove sysfs file of node
    Date
    From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>

    The patch adds node_set_offline() and unregister_one_node() to remove_memory()
    for removing sysfs file of node.

    CC: David Rientjes <rientjes@google.com>
    CC: Jiang Liu <liuj97@gmail.com>
    CC: Len Brown <len.brown@intel.com>
    CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    CC: Paul Mackerras <paulus@samba.org>
    CC: Christoph Lameter <cl@linux.com>
    Cc: Minchan Kim <minchan.kim@gmail.com>
    CC: Andrew Morton <akpm@linux-foundation.org>
    CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    CC: Wen Congyang <wency@cn.fujitsu.com>
    Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
    ---
    mm/memory_hotplug.c | 5 +++++
    1 files changed, 5 insertions(+), 0 deletions(-)

    diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
    index 68d7123..7d68e0a 100644
    --- a/mm/memory_hotplug.c
    +++ b/mm/memory_hotplug.c
    @@ -1271,6 +1271,11 @@ int __ref remove_memory(int nid, u64 start, u64 size)
    /* remove memmap entry */
    firmware_map_remove(start, start + size, "System RAM");

    + if (!node_present_pages(nid)) {
    + node_set_offline(nid);
    + unregister_one_node(nid);
    + }
    +
    arch_remove_memory(start, size);
    out:
    unlock_memory_hotplug();
    --
    1.7.1


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