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From: Matthew Wilcox <willy@infradead.org>
To: linux-fsdevel@vger.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH v5 19/39] iomap: Handle tail pages in iomap_page_mkwrite
Date: Thu, 28 May 2020 19:58:04 -0700	[thread overview]
Message-ID: <20200529025824.32296-20-willy@infradead.org> (raw)
In-Reply-To: <20200529025824.32296-1-willy@infradead.org>

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

iomap_page_mkwrite() can be called with a tail page.  If we are,
operate on the head page, since we're treating the entire thing as a
single unit and the whole page is dirtied at the same time.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/iomap/buffered-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 5b37844b7d97..78098b94fade 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1064,7 +1064,7 @@ iomap_page_mkwrite_actor(struct inode *inode, loff_t pos, loff_t length,
 
 vm_fault_t iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops)
 {
-	struct page *page = vmf->page;
+	struct page *page = compound_head(vmf->page);
 	struct inode *inode = file_inode(vmf->vma->vm_file);
 	unsigned long length;
 	loff_t offset;
-- 
2.26.2



  parent reply	other threads:[~2020-05-29  2:58 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-29  2:57 [PATCH v5 00/39] Large pages in the page cache Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 01/39] mm: Move PageDoubleMap bit Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 02/39] mm: Simplify PageDoubleMap with PF_SECOND policy Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 03/39] mm: Allow hpages to be arbitrary order Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 04/39] mm: Introduce thp_size Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 05/39] mm: Introduce thp_order Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 06/39] mm: Introduce offset_in_thp Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 07/39] fs: Add a filesystem flag for large pages Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 08/39] fs: Do not update nr_thps for large page mappings Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 09/39] fs: Introduce i_blocks_per_page Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 10/39] fs: Make page_mkwrite_check_truncate thp-aware Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 11/39] fs: Support THPs in zero_user_segments Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 12/39] bio: Add bio_for_each_thp_segment_all Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 13/39] iomap: Support arbitrarily many blocks per page Matthew Wilcox
2020-05-29  2:57 ` [PATCH v5 14/39] iomap: Support large pages in iomap_adjust_read_range Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 15/39] iomap: Support large pages in invalidatepage Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 16/39] iomap: Support large pages in read paths Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 17/39] iomap: Support large pages in write paths Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 18/39] iomap: Inline data shouldn't see large pages Matthew Wilcox
2020-05-29  2:58 ` Matthew Wilcox [this message]
2020-05-29  2:58 ` [PATCH v5 20/39] xfs: Support " Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 21/39] mm: Make prep_transhuge_page return its argument Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 22/39] mm: Add __page_cache_alloc_order Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 23/39] mm: Allow large pages to be added to the page cache Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 24/39] mm: Allow large pages to be removed from " Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 25/39] mm: Remove page fault assumption of compound page size Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 26/39] mm: Fix total_mapcount assumption of " Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 27/39] mm: Remove assumptions of THP size Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 28/39] mm: Avoid splitting large pages Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 29/39] mm: Fix truncation for pages of arbitrary size Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 30/39] mm: Handle truncates that split large pages Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 31/39] mm: Support storing shadow entries for " Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 32/39] mm: Support retrieving tail pages from the page cache Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 33/39] mm: Support tail pages in wait_for_stable_page Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 34/39] mm: Add DEFINE_READAHEAD Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 35/39] mm: Make page_cache_readahead_unbounded take a readahead_control Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 36/39] mm: Make __do_page_cache_readahead " Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 37/39] mm: Allow PageReadahead to be set on head pages Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 38/39] mm: Add large page readahead Matthew Wilcox
2020-05-29  2:58 ` [PATCH v5 39/39] mm: Align THP mappings for non-DAX Matthew Wilcox

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