linux-kernel - Re: [patch 4/5] mm: filemap: pass __GFP_WRITE from grab_cache_page_write

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 30 Sep 2011 16:41:22 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	Johannes Weiner <jweiner@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>,
	Christoph Hellwig <hch@...radead.org>,
	Dave Chinner <david@...morbit.com>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Chris Mason <chris.mason@...cle.com>,
	Theodore Ts'o <tytso@....edu>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Shaohua Li <shaohua.li@...el.com>, xfs@....sgi.com,
	linux-btrfs@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 4/5] mm: filemap: pass __GFP_WRITE from
 grab_cache_page_write_begin()

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 <jweiner@...hat.com>
> Reviewed-by: Rik van Riel <riel@...hat.com>
> Acked-by: Mel Gorman <mgorman@...e.de>
> Reviewed-by: Minchan Kim <minchan.kim@...il.com>

Reviewed-by: Michal Hocko <mhocko@...e.cz>

> ---
>  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
> 
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@...ck.org.  For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
> Don't email: <a href=mailto:"dont@...ck.org"> email@...ck.org </a>

-- 
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/