@samsung.com; jy0922.s...@samsung.com
Subject: Re: [PATCH 2/2 v4] drm/exynos: added userptr feature.
On Tue, May 15, 2012 at 12:33 AM, Inki Dae inki@samsung.com wrote:
Hi Jerome,
-Original Message-
From: Jerome Glisse [mailto:j.gli...@gmail.com]
Sent: Tuesday, May 15, 2012 4:27
; sw0312@samsung.com;
jy0922.s...@samsung.com
Subject: Re: [PATCH 2/2 v4] drm/exynos: added userptr feature.
+ npages = buf-size PAGE_SHIFT;
Why round down? usually we use round up.
The size was already rounded up by exynos_drm_gem_userptr_ioctl so this is
just used to get page count
;
kosaki.motoh...@gmail.com; kyungmin.p...@samsung.com;
sw0312@samsung.com; jy0922.s...@samsung.com
Subject: Re: [PATCH 2/2 v4] drm/exynos: added userptr feature.
On Mon, May 14, 2012 at 2:17 AM, Inki Dae inki@samsung.com wrote:
this feature is used to import user space region allocated by malloc
+ npages = buf-size PAGE_SHIFT;
Why round down? usually we use round up.
+ down_read(current-mm-mmap_sem);
+
+ /*
+ * Basically, all the pages from get_user_pages() can not be not only
+ * migrated by CMA but also swapped out.
+ *
+ * The
...@samsung.com
Subject: Re: [PATCH 2/2 v4] drm/exynos: added userptr feature.
+ npages = buf-size PAGE_SHIFT;
Why round down? usually we use round up.
The size was already rounded up by exynos_drm_gem_userptr_ioctl so this is
just used to get page count.
+ down_read
@samsung.com; jy0922.s...@samsung.com
Subject: Re: [PATCH 2/2 v4] drm/exynos: added userptr feature.
(5/14/12 2:52 AM), Inki Dae wrote:
-Original Message-
From: KOSAKI Motohiro [mailto:kosaki.motoh...@gmail.com]
Sent: Monday, May 14, 2012 3:33 PM
To: Inki Dae
Cc: airl...@linux.ie
;
sw0312@samsung.com; jy0922.s...@samsung.com
Subject: Re: [PATCH 2/2 v4] drm/exynos: added userptr feature.
(5/14/12 2:52 AM), Inki Dae wrote:
-Original Message-
From: KOSAKI Motohiro [mailto:kosaki.motoh...@gmail.com]
Sent: Monday, May 14, 2012 3:33 PM
To: Inki Dae
Cc
On Mon, May 14, 2012 at 2:17 AM, Inki Dae inki@samsung.com wrote:
this feature is used to import user space region allocated by malloc() or
mmaped into a gem. for this, we uses get_user_pages() to get all the pages
to VMAs within user address space. However we should pay attention to use
; jy0922.s...@samsung.com
Subject: Re: [PATCH 2/2 v4] drm/exynos: added userptr feature.
On Mon, May 14, 2012 at 2:17 AM, Inki Dae inki@samsung.com wrote:
this feature is used to import user space region allocated by malloc()
or
mmaped into a gem. for this, we uses get_user_pages() to get
