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 14:19:49 +0900 (JST) [thread overview]
Message-ID: <20090420141710.2509.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <49EC029D.1060807@gmail.com>
> The v4l2 method IO_METHOD_MMAP does use the vmaloc() method you told above ,
> our driver also support this method,we user vmalloc /remap_vmalloc_range().
>
> But the v4l2 method IO_METHOD_USERPTR must use the method I told above.
I guess you mean IO_METHOD_USERPTR can't use remap_vmalloc_range, right?
we need explanation of v4l2 requirement.
Can you explain why v4l2 use two different way? Why application developer
need two way?
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next prev parent reply other threads:[~2009-04-20 5:19 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 [this message]
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
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