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Date: Wed, 20 Feb 2013 19:31:54 +0800 From: Simon Jeons <simon.jeons@...il.com> To: Lin Feng <linfeng@...fujitsu.com> CC: Mel Gorman <mgorman@...e.de>, Andrew Morton <akpm@...ux-foundation.org>, bcrl@...ck.org, viro@...iv.linux.org.uk, khlebnikov@...nvz.org, walken@...gle.com, kamezawa.hiroyu@...fujitsu.com, minchan@...nel.org, riel@...hat.com, rientjes@...gle.com, isimatu.yasuaki@...fujitsu.com, wency@...fujitsu.com, laijs@...fujitsu.com, jiang.liu@...wei.com, mhocko@...e.cz, linux-mm@...ck.org, linux-aio@...ck.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/2] mm: hotplug: implement non-movable version of get_user_pages() called get_user_pages_non_movable() On 02/20/2013 06:23 PM, Lin Feng wrote: > Hi Simon, > > On 02/20/2013 05:58 PM, Simon Jeons wrote: >>> The other is that this almost certainly broken for transhuge page >>> handling. gup returns the head and tail pages and ordinarily this is ok >> When need gup thp? in kvm case? > gup just pins the wanted pages(for x86 is 4k size) of user address space in memory. > We can't expect the pages have been allocated for user address space are thp or > normal page. So we need to deal with them and I think it have nothing to do with kvm. Ok, I'm curious about userspace process call which funtion(will call gup) to pin pages except make_pages_present? > > thanks, > linfeng -- 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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