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SubjectRe: [PATCH 10/26] lustre: Convert ll_get_user_pages() to use get_user_pages_fast()
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On 2013/10/02 8:27 AM, "Jan Kara" <jack@suse.cz> wrote:
>CC: Greg Kroah-Hartman <greg@kroah.com>
>CC: Peng Tao <tao.peng@emc.com>
>CC: Andreas Dilger <andreas.dilger@intel.com>
>CC: hpdd-discuss@lists.01.org
>Signed-off-by: Jan Kara <jack@suse.cz>

Acked-by: Andreas Dilger <andreas.dilger@intel.com>

>---
> drivers/staging/lustre/lustre/llite/rw26.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
>
>diff --git a/drivers/staging/lustre/lustre/llite/rw26.c
>b/drivers/staging/lustre/lustre/llite/rw26.c
>index 96c29ad2fc8c..7e3e0967993b 100644
>--- a/drivers/staging/lustre/lustre/llite/rw26.c
>+++ b/drivers/staging/lustre/lustre/llite/rw26.c
>@@ -202,11 +202,8 @@ static inline int ll_get_user_pages(int rw, unsigned
>long user_addr,
>
> OBD_ALLOC_LARGE(*pages, *max_pages * sizeof(**pages));
> if (*pages) {
>- down_read(&current->mm->mmap_sem);
>- result = get_user_pages(current, current->mm, user_addr,
>- *max_pages, (rw == READ), 0, *pages,
>- NULL);
>- up_read(&current->mm->mmap_sem);
>+ result = get_user_pages_fast(user_addr, *max_pages,
>+ (rw == READ), *pages);
> if (unlikely(result <= 0))
> OBD_FREE_LARGE(*pages, *max_pages * sizeof(**pages));
> }


Cheers, Andreas
--
Andreas Dilger

Lustre Software Architect
Intel High Performance Data Division




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