Commit 0faa70cb authored Jan 10, 2012 by Johannes Weiner Committed by Linus Torvalds Jan 10, 2012

mm: filemap: pass __GFP_WRITE from grab_cache_page_write_begin()



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@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Shaohua Li <shaohua.li@intel.com>
Cc: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent a756cf59

mm/filemap.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -2351,8 +2351,11 @@ 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:
		@@ -2360,7 +2363,7 @@ 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,