(2012/12/24 21:09), Tang Chen wrote: > In __remove_section(), we locked pgdat_resize_lock when calling > sparse_remove_one_section(). This lock will disable irq. But we don't need > to lock the whole function. If we do some work to free pagetables in > free_section_usemap(), we need to call flush_tlb_all(), which need > irq enabled. Otherwise the WARN_ON_ONCE() in smp_call_function_many() > will be triggered. > > Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx> > Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx> > Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx> If this is a bug fix, call-trace in your log and BUGFIX or -fix- in patch title will be appreciated, I think. Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> -- 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>