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 07/39] fs: Add a filesystem flag for large pages
Date: Thu, 28 May 2020 19:57:52 -0700 [thread overview]
Message-ID: <20200529025824.32296-8-willy@infradead.org> (raw)
In-Reply-To: <20200529025824.32296-1-willy@infradead.org>
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
The page cache needs to know whether the filesystem supports pages >
PAGE_SIZE.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
fs/inode.c | 2 ++
include/linux/fs.h | 1 +
include/linux/pagemap.h | 6 ++++++
3 files changed, 9 insertions(+)
diff --git a/fs/inode.c b/fs/inode.c
index 93d9252a00ab..a92947d63098 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -181,6 +181,8 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
mapping->a_ops = &empty_aops;
mapping->host = inode;
mapping->flags = 0;
+ if (sb->s_type->fs_flags & FS_LARGE_PAGES)
+ __set_bit(AS_LARGE_PAGES, &mapping->flags);
mapping->wb_err = 0;
atomic_set(&mapping->i_mmap_writable, 0);
#ifdef CONFIG_READ_ONLY_THP_FOR_FS
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 55c743925c40..777783c8760b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2241,6 +2241,7 @@ struct file_system_type {
#define FS_HAS_SUBTYPE 4
#define FS_USERNS_MOUNT 8 /* Can be mounted by userns root */
#define FS_DISALLOW_NOTIFY_PERM 16 /* Disable fanotify permission events */
+#define FS_LARGE_PAGES 8192 /* Remove once all fs converted */
#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() during rename() internally. */
int (*init_fs_context)(struct fs_context *);
const struct fs_parameter_spec *parameters;
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 36bfc9d855bb..ea869a7fda7a 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -29,6 +29,7 @@ enum mapping_flags {
AS_EXITING = 4, /* final truncate in progress */
/* writeback related tags are not used */
AS_NO_WRITEBACK_TAGS = 5,
+ AS_LARGE_PAGES = 6, /* large pages supported */
};
/**
@@ -116,6 +117,11 @@ static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask)
m->gfp_mask = mask;
}
+static inline bool mapping_large_pages(struct address_space *mapping)
+{
+ return test_bit(AS_LARGE_PAGES, &mapping->flags);
+}
+
void release_pages(struct page **pages, int nr);
/*
--
2.26.2
next prev 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 ` Matthew Wilcox [this message]
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 ` [PATCH v5 19/39] iomap: Handle tail pages in iomap_page_mkwrite Matthew Wilcox
2020-05-29 2:58 ` [PATCH v5 20/39] xfs: Support large pages 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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