diff mbox series

[v2,08/25] mm: Introduce thp_order

Message ID	20200212041845.25879-9-willy@infradead.org (mailing list archive)
State	New, archived
Headers	show Return-Path: <SRS0=X5ID=4A=vger.kernel.org=linux-fsdevel-owner@kernel.org> From: Matthew Wilcox <willy@infradead.org> To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>, linux-kernel@vger.kernel.org Subject: [PATCH v2 08/25] mm: Introduce thp_order Date: Tue, 11 Feb 2020 20:18:28 -0800 Message-Id: <20200212041845.25879-9-willy@infradead.org> In-Reply-To: <20200212041845.25879-1-willy@infradead.org> References: <20200212041845.25879-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk
Series	Large pages in the page cache \| expand [v2,00/25] Large pages in the page cache [v2,01/25] mm: Use vm_fault error code directly [v2,02/25] mm: Optimise find_subpage for !THP [v2,03/25] mm: Use VM_BUG_ON_PAGE in clear_page_dirty_for_io [v2,04/25] mm: Unexport find_get_entry [v2,05/25] mm: Fix documentation of FGP flags [v2,06/25] mm: Allow hpages to be arbitrary order [v2,07/25] mm: Introduce thp_size [v2,08/25] mm: Introduce thp_order [v2,09/25] fs: Add a filesystem flag for large pages [v2,10/25] fs: Introduce i_blocks_per_page [v2,11/25] fs: Make page_mkwrite_check_truncate thp-aware [v2,12/25] mm: Add file_offset_of_ helpers [v2,13/25] fs: Add zero_user_large [v2,14/25] iomap: Support arbitrarily many blocks per page [v2,15/25] iomap: Support large pages in iomap_adjust_read_range [v2,16/25] iomap: Support large pages in read paths [v2,17/25] iomap: Support large pages in write paths [v2,18/25] iomap: Inline data shouldn't see large pages [v2,19/25] xfs: Support large pages [v2,20/25] mm: Make prep_transhuge_page return its argument [v2,21/25] mm: Add __page_cache_alloc_order [v2,22/25] mm: Allow large pages to be added to the page cache [v2,23/25] mm: Allow large pages to be removed from the page cache [v2,24/25] mm: Add large page readahead [v2,25/25] mm: Align THP mappings for non-DAX

Commit Message

Matthew Wilcox Feb. 12, 2020, 4:18 a.m. UTC

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

Like compound_order() except 0 when THP is disabled.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 include/linux/huge_mm.h | 2 ++
 1 file changed, 2 insertions(+)

Comments

Kirill A . Shutemov Feb. 13, 2020, 2:20 p.m. UTC | #1

On Tue, Feb 11, 2020 at 08:18:28PM -0800, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> 
> Like compound_order() except 0 when THP is disabled.

Again, functions are preferred if an option.

diff mbox series

Patch

diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index 3680ae2d9019..3de788ee25bd 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -233,6 +233,7 @@  static inline spinlock_t *pud_trans_huge_lock(pud_t *pud,
 
 #define hpage_nr_pages(page)	(long)compound_nr(page)
 #define thp_size(page)		page_size(page)
+#define thp_order(page)		compound_order(page)
 
 struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr,
 		pmd_t *pmd, int flags, struct dev_pagemap **pgmap);
@@ -288,6 +289,7 @@  static inline struct list_head *page_deferred_list(struct page *page)
 
 #define hpage_nr_pages(x) 1L
 #define thp_size(x)		PAGE_SIZE
+#define thp_order(x)		0U
 
 static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
 {