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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-10-15 20:06:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-16 11:11:15 -0700 |
| commit | 01c70267053d6718820ac0902d8823d5dd2a6adb (patch) | |
| tree | b7fdcb9b88223313be07413999d5e2a584faa9db /fs/inode.c | |
| parent | 3efe62e466958a1e59e68e0faa5c66b5b99b17ce (diff) | |
| download | linux-01c70267053d6718820ac0902d8823d5dd2a6adb.tar.gz linux-01c70267053d6718820ac0902d8823d5dd2a6adb.tar.xz | |
fs: add a filesystem flag for THPs
The page cache needs to know whether the filesystem supports THPs so that
it doesn't send THPs to filesystems which can't handle them. Dave Chinner
points out that getting from the page mapping to the filesystem type is
too many steps (mapping->host->i_sb->s_type->fs_flags) so cache that
information in the address space flags.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Link: https://lkml.kernel.org/r/20200916032717.22917-1-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/inode.c')
| -rw-r--r-- | fs/inode.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/inode.c b/fs/inode.c index 72c4c347afb7..9d78c37b00b8 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_THP_SUPPORT) + __set_bit(AS_THP_SUPPORT, &mapping->flags); mapping->wb_err = 0; atomic_set(&mapping->i_mmap_writable, 0); #ifdef CONFIG_READ_ONLY_THP_FOR_FS |