(2012/12/27 21:16), Wen Congyang wrote: > At 12/26/2012 11:55 AM, Kamezawa Hiroyuki Wrote: >> (2012/12/24 21:09), Tang Chen wrote: >>> From: Wen Congyang <we...@cn.fujitsu.com> >>> >>> We call hotadd_new_pgdat() to allocate memory to store node_data. So we >>> should free it when removing a node. >>> >>> Signed-off-by: Wen Congyang <we...@cn.fujitsu.com> >> >> I'm sorry but is it safe to remove pgdat ? All zone cache and zonelists are >> properly cleared/rebuilded in synchronous way ? and No threads are visinting >> zone in vmscan.c ? > > We have rebuilt zonelists when a zone has no memory after offlining some > pages. >
How do you guarantee that the address of pgdat/zone is not on stack of any kernel threads or other kernel objects without reference counting or other syncing method ? Thanks, -Kame -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
