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Message-ID: <50DA65B7.2050707@cn.fujitsu.com> Date: Wed, 26 Dec 2012 10:49:27 +0800 From: Tang Chen <tangchen@...fujitsu.com> To: Jianguo Wu <wujianguo@...wei.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, 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 08/14] memory-hotplug: Common APIs to support page tables hot-remove On 12/25/2012 04:17 PM, Jianguo Wu wrote: >> + >> +static void __meminit free_pagetable(struct page *page, int order) >> +{ >> + struct zone *zone; >> + bool bootmem = false; >> + unsigned long magic; >> + >> + /* bootmem page has reserved flag */ >> + if (PageReserved(page)) { >> + __ClearPageReserved(page); >> + bootmem = true; >> + >> + magic = (unsigned long)page->lru.next; >> + if (magic == SECTION_INFO || magic == MIX_SECTION_INFO) >> + put_page_bootmem(page); > > Hi Tang, > > For removing memmap of sparse-vmemmap, in cpu_has_pse case, if magic == SECTION_INFO, > the order will be get_order(PMD_SIZE), so we need a loop here to put all the 512 pages. > Hi Wu, Thanks for reminding me that. I truely missed it. And since in register_page_bootmem_info_section(), a whole memory section will be set as SECTION_INFO, I think we don't need to check the page magic one by one, just the first one is enough. :) I will fix it, thanks. :) -- 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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