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Message-ID: <50DA7357.109@jp.fujitsu.com> Date: Wed, 26 Dec 2012 12:47:35 +0900 From: Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: Tang Chen <tangchen@...fujitsu.com> CC: akpm@...ux-foundation.org, rientjes@...gle.com, liuj97@...il.com, len.brown@...el.com, benh@...nel.crashing.org, paulus@...ba.org, cl@...ux.com, minchan.kim@...il.com, kosaki.motohiro@...fujitsu.com, isimatu.yasuaki@...fujitsu.com, wujianguo@...wei.com, wency@...fujitsu.com, hpa@...or.com, linfeng@...fujitsu.com, laijs@...fujitsu.com, mgorman@...e.de, yinghai@...nel.org, x86@...nel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-acpi@...r.kernel.org, linux-s390@...r.kernel.org, linux-sh@...r.kernel.org, linux-ia64@...r.kernel.org, cmetcalf@...era.com, sparclinux@...r.kernel.org Subject: Re: [PATCH v5 07/14] memory-hotplug: move pgdat_resize_lock into sparse_remove_one_section() (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@...fujitsu.com> > Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com> > Signed-off-by: Wen Congyang <wency@...fujitsu.com> 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@...fujitsu.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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