Re: [PATCH v5 07/14] memory-hotplug: move pgdat_resize_lock intosparse_remove_one_section()

[Kamezawa Hiroyuki]

(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>


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