From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Huang Shijie <shijie8@gmail.com>
Cc: kosaki.motohiro@jp.fujitsu.com,
Minchan Kim <minchan.kim@gmail.com>,
linux-mm@kvack.org
Subject: Re: Does get_user_pages_fast lock the user pages in memory in my case?
Date: Mon, 20 Apr 2009 12:18:44 +0900 (JST) [thread overview]
Message-ID: <20090420121401.4B60.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <49EBDADB.4040307@gmail.com>
> I think there two places to put back the gup() pages.
> <1> isolate_page_glable()
> <2> in the shrink_page_list(), before called the try_to_unmap().
> KOSAKI Motohiro 's patch takes effect in the second place.
> I think the first place is better.
It seems don't works it.
Andrea pointed out mmu_notifier issue. kvm pinned various page for
shadow pte.
it is unmapped by mmu_notifier_invalidate_page() in try_to_unmap_one().
Thus, we can only check page_count after mmu_notifier_invalidate_page.
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prev parent reply other threads:[~2009-04-20 3:18 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-17 7:01 Huang Shijie
2009-04-18 6:18 ` KOSAKI Motohiro
2009-04-20 2:22 ` Huang Shijie
2009-04-19 23:45 ` Minchan Kim
2009-04-20 2:15 ` Huang Shijie
2009-04-20 2:42 ` Minchan Kim
2009-04-20 3:28 ` Huang Shijie
2009-04-20 3:42 ` KOSAKI Motohiro
2009-04-20 4:53 ` Minchan Kim
2009-04-20 5:05 ` KOSAKI Motohiro
2009-04-20 5:05 ` Huang Shijie
2009-04-20 5:19 ` KOSAKI Motohiro
2009-04-20 5:37 ` Huang Shijie
2009-04-20 7:59 ` KOSAKI Motohiro
2009-04-20 8:23 ` Huang Shijie
2009-04-20 9:24 ` KOSAKI Motohiro
2009-04-20 9:47 ` Huang Shijie
2009-04-21 1:43 ` KOSAKI Motohiro
2009-04-21 19:47 ` Christoph Lameter
2009-04-20 5:24 ` Minchan Kim
2009-04-20 5:42 ` Huang Shijie
2009-04-20 3:57 ` Huang Shijie
2009-04-22 6:08 ` Huang Shijie
2009-04-22 9:46 ` Minchan Kim
2009-04-20 3:18 ` KOSAKI Motohiro [this message]
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