From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kirill A. Shutemov" Subject: [PATCHv2, RFC 07/30] thp, mm: introduce mapping_can_have_hugepages() predicate Date: Thu, 14 Mar 2013 19:50:12 +0200 Message-ID: <1363283435-7666-8-git-send-email-kirill.shutemov@linux.intel.com> References: <1363283435-7666-1-git-send-email-kirill.shutemov@linux.intel.com> Cc: Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , Hillf Danton , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" To: Andrea Arcangeli , Andrew Morton , Al Viro , Hugh Dickins Return-path: In-Reply-To: <1363283435-7666-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org From: "Kirill A. Shutemov" Returns true if mapping can have huge pages. Just check for __GFP_COMP in gfp mask of the mapping for now. Signed-off-by: Kirill A. Shutemov --- include/linux/pagemap.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index e3dea75..3521b0d 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -84,6 +84,16 @@ static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask) (__force unsigned long)mask; } +static inline bool mapping_can_have_hugepages(struct address_space *m) +{ + if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) { + gfp_t gfp_mask = mapping_gfp_mask(m); + return !!(gfp_mask & __GFP_COMP); + } + + return false; +} + /* * The page cache can done in larger chunks than * one page, because it allows for more efficient -- 1.7.10.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org