From: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
To: Inki Dae <inki.dae@samsung.com>
Cc: 'Minchan Kim' <minchan@kernel.org>,
'InKi Dae' <daeinki@gmail.com>,
'Jerome Glisse' <j.glisse@gmail.com>,
airlied@linux.ie, dri-devel@lists.freedesktop.org,
kyungmin.park@samsung.com, sw0312.kim@samsung.com,
linux-mm@kvack.org, kosaki.motohiro@gmail.com
Subject: Re: [PATCH 2/2 v3] drm/exynos: added userptr feature.
Date: Thu, 10 May 2012 13:53:21 -0400 [thread overview]
Message-ID: <4FAC0091.7070606@gmail.com> (raw)
In-Reply-To: <003301cd2e89$13f78c00$3be6a400$%dae@samsung.com>
>>> let's assume that one application want to allocate user space memory
>>> region using malloc() and then write something on the region. as you
>>> may know, user space buffer doen't have real physical pages once
>>> malloc() call so if user tries to access the region then page fault
>>> handler would be triggered
>>
>>
>> Understood.
>>
>>> and then in turn next process like swap in to fill physical frame number
>> into entry of the page faulted.
>>
>>
>> Sorry, I can't understand your point due to my poor English.
>> Could you rewrite it easiliy? :)
>>
>
> Simply saying, handle_mm_fault would be called to update pte after finding
> vma and checking access right. and as you know, there are many cases to
> process page fault such as COW or demand paging.
Hmm. If I understand correctly, you guys misunderstand mlock. it doesn't page pinning
nor prevent pfn change. It only guarantee to don't make swap out. e.g. memory campaction
feature may automatically change page physical address.
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next prev parent reply other threads:[~2012-05-10 17:53 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-23 13:43 [PATCH 0/4] updated exynos-drm-next Inki Dae
2012-04-23 13:43 ` [PATCH 1/4] drm/exynos: added cache attribute support for gem Inki Dae
2012-04-23 13:43 ` [PATCH 2/4] drm/exynos: added drm prime feature Inki Dae
2012-04-23 13:43 ` [PATCH 3/4] drm/exynos: added userptr feature Inki Dae
2012-04-24 5:17 ` [PATCH v2 " Inki Dae
2012-04-25 10:15 ` Dave Airlie
2012-04-25 12:46 ` InKi Dae
2012-05-05 10:19 ` daeinki
2012-05-05 10:22 ` Dave Airlie
2012-05-07 18:18 ` Jerome Glisse
2012-05-08 7:59 ` Inki Dae
2012-05-08 15:05 ` Jerome Glisse
2012-05-08 6:48 ` Inki Dae
2012-05-09 6:17 ` [PATCH 0/2 v3] " Inki Dae
2012-05-09 6:17 ` [PATCH 1/2 v3] drm/exynos: added userptr limit ioctl Inki Dae
2012-05-09 6:17 ` [PATCH 2/2 v3] drm/exynos: added userptr feature Inki Dae
2012-05-09 14:45 ` Jerome Glisse
2012-05-09 18:32 ` Jerome Glisse
2012-05-10 2:44 ` Inki Dae
2012-05-10 15:05 ` Jerome Glisse
2012-05-10 15:31 ` Daniel Vetter
2012-05-10 15:31 ` Daniel Vetter
2012-05-10 15:52 ` Jerome Glisse
2012-05-11 1:47 ` Inki Dae
2012-05-11 2:08 ` Minchan Kim
2012-05-10 1:39 ` Inki Dae
2012-05-10 4:58 ` Minchan Kim
2012-05-10 6:53 ` KOSAKI Motohiro
2012-05-10 7:27 ` Minchan Kim
2012-05-10 7:31 ` Kyungmin Park
2012-05-10 7:56 ` Minchan Kim
2012-05-10 7:58 ` Minchan Kim
2012-05-10 6:57 ` Inki Dae
2012-05-10 7:05 ` Minchan Kim
2012-05-10 7:59 ` InKi Dae
2012-05-10 8:11 ` Minchan Kim
2012-05-10 8:44 ` Inki Dae
2012-05-10 17:53 ` KOSAKI Motohiro [this message]
2012-05-11 0:50 ` Minchan Kim
2012-05-11 2:51 ` KOSAKI Motohiro
2012-05-11 3:01 ` Jerome Glisse
2012-05-11 21:20 ` KOSAKI Motohiro
2012-05-11 22:22 ` Jerome Glisse
2012-05-11 22:59 ` KOSAKI Motohiro
2012-05-11 22:59 ` KOSAKI Motohiro
2012-05-11 23:29 ` Jerome Glisse
2012-05-11 23:39 ` KOSAKI Motohiro
2012-05-12 4:48 ` InKi Dae
2012-05-14 4:29 ` Minchan Kim
2012-05-14 4:29 ` Minchan Kim
2012-05-14 6:17 ` [PATCH 0/2 v4] " Inki Dae
2012-05-14 6:17 ` [PATCH 1/2 v4] drm/exynos: added userptr limit ioctl Inki Dae
2012-05-14 8:12 ` Inki Dae
2012-05-14 6:17 ` [PATCH 2/2 v4] drm/exynos: added userptr feature Inki Dae
2012-05-14 6:33 ` KOSAKI Motohiro
2012-05-14 6:52 ` Inki Dae
2012-05-14 7:04 ` KOSAKI Motohiro
2012-05-14 7:21 ` Inki Dae
2012-05-14 8:13 ` Inki Dae
2012-05-14 19:26 ` Jerome Glisse
2012-05-15 4:33 ` Inki Dae
2012-05-15 14:31 ` Jerome Glisse
2012-05-16 8:49 ` Inki Dae
2012-05-14 8:12 ` [PATCH 0/2 " Inki Dae
2012-05-15 7:34 ` [PATCH 3/4] " Rob Clark
2012-05-15 8:17 ` Inki Dae
2012-05-15 9:35 ` Rob Clark
2012-05-15 13:40 ` InKi Dae
2012-05-15 14:28 ` Rob Clark
2012-05-16 6:04 ` Inki Dae
2012-05-16 8:42 ` Rob Clark
2012-05-16 10:30 ` Inki Dae
2012-05-16 9:22 ` Dave Airlie
2012-05-16 10:20 ` Inki Dae
2012-05-16 12:12 ` Rob Clark
2012-05-16 13:27 ` Inki Dae
2012-04-23 13:43 ` [PATCH 4/4] drm/exynos: added a feature to get gem buffer information Inki Dae
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