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Date: Wed, 23 Apr 2008 17:04:15 +0900 From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: Shi Weihua <shiwh@...fujitsu.com> Cc: akpm@...ux-foundation.org, Hugh Dickins <hugh@...itas.com>, Mel Gorman <mel@....ul.ie>, balbir@...ux.vnet.ibm.com, xemul@...nvz.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: Re: [BUGFIX][PATCH] Fix usemap initialization v3 On Wed, 23 Apr 2008 14:19:04 +0800 Shi Weihua <shiwh@...fujitsu.com> wrote: > KAMEZAWA Hiroyuki wrote:: > > fixed typos. > > == > > usemap must be initialized only when pfn is within zone. > > If not, it corrupts memory. > > > > And this patch also reduces the number of calls to set_pageblock_migratetype() > > from > > (pfn & (pageblock_nr_pages -1) > > to > > !(pfn & (pageblock_nr_pages-1) > > it should be called once per pageblock. > > > > Changelog. > > v2->v3 > > - Fixed typos. > > v1->v2 > > - Fixed boundary check. > > - Move calculation of pointer for zone struct to out of loop. > > I noticed v3 takes "zone" instead of "zid" in the code line > "z = &NODE_DATA(nid)->node_zones[zone];". > I tested v3, it works well now. > I don't understand why this happens. (I compiled and tested v2...) v3's "zone" is correct. thank you! Regards, -Kame -- 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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