On Fri 30-09-11 09:17:23, Johannes Weiner wrote:
> Tell the page allocator that pages allocated through
> grab_cache_page_write_begin() are expected to become dirty soon.
> 
> Signed-off-by: Johannes Weiner <[email protected]>
> Reviewed-by: Rik van Riel <[email protected]>
> Acked-by: Mel Gorman <[email protected]>
> Reviewed-by: Minchan Kim <[email protected]>

Reviewed-by: Michal Hocko <[email protected]>

> ---
>  mm/filemap.c |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/mm/filemap.c b/mm/filemap.c
> index 645a080..cf0352d 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -2349,8 +2349,11 @@ struct page *grab_cache_page_write_begin(struct 
> address_space *mapping,
>                                       pgoff_t index, unsigned flags)
>  {
>       int status;
> +     gfp_t gfp_mask;
>       struct page *page;
>       gfp_t gfp_notmask = 0;
> +
> +     gfp_mask = mapping_gfp_mask(mapping) | __GFP_WRITE;
>       if (flags & AOP_FLAG_NOFS)
>               gfp_notmask = __GFP_FS;
>  repeat:
> @@ -2358,7 +2361,7 @@ repeat:
>       if (page)
>               goto found;
>  
> -     page = __page_cache_alloc(mapping_gfp_mask(mapping) & ~gfp_notmask);
> +     page = __page_cache_alloc(gfp_mask & ~gfp_notmask);
>       if (!page)
>               return NULL;
>       status = add_to_page_cache_lru(page, mapping, index,
> -- 
> 1.7.6.2
> 
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-- 
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
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