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| author | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-03-06 06:31:38 +0100 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-03-07 03:21:10 +0100 |
| commit | 4127caee89612a84adedd78c9453089138cd5afe (patch) | |
| tree | 85883f4555971f92fba0c95dd882e0ccbb2faded /fs/erofs/data.c | |
| parent | erofs: fix uninitialized page cache reported by KMSAN (diff) | |
| download | linux-4127caee89612a84adedd78c9453089138cd5afe.tar.xz linux-4127caee89612a84adedd78c9453089138cd5afe.zip | |
erofs: apply proper VMA alignment for memory mapped files on THP
There are mainly two reasons that thp_get_unmapped_area() should be
used for EROFS as other filesystems:
- It's needed to enable PMD mappings as a FSDAX filesystem, see
commit 74d2fad1334d ("thp, dax: add thp_get_unmapped_area for pmd
mappings");
- It's useful together with large folios and
CONFIG_READ_ONLY_THP_FOR_FS which enable THPs for mmapped files
(e.g. shared libraries) even without FSDAX. See commit 1854bc6e2420
("mm/readahead: Align file mappings for non-DAX").
Fixes: 06252e9ce05b ("erofs: dax support for non-tailpacking regular file")
Fixes: ce529cc25b18 ("erofs: enable large folios for iomap mode")
Fixes: e6687b89225e ("erofs: enable large folios for fscache mode")
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240306053138.2240206-1-hsiangkao@linux.alibaba.com
Diffstat (limited to 'fs/erofs/data.c')
| -rw-r--r-- | fs/erofs/data.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/erofs/data.c b/fs/erofs/data.c index c98aeda8abb2..3d9721b3faa8 100644 --- a/fs/erofs/data.c +++ b/fs/erofs/data.c @@ -447,5 +447,6 @@ const struct file_operations erofs_file_fops = { .llseek = generic_file_llseek, .read_iter = erofs_file_read_iter, .mmap = erofs_file_mmap, + .get_unmapped_area = thp_get_unmapped_area, .splice_read = filemap_splice_read, }; |