erofs: apply proper VMA alignment for memory mapped files on THP
[ Upstream commit 4127caee ] 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 74d2fad1 ("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 1854bc6e ("mm/readahead: Align file mappings for non-DAX"). Fixes: 06252e9c ("erofs: dax support for non-tailpacking regular file") Fixes: ce529cc2 ("erofs: enable large folios for iomap mode") Fixes: e6687b89 ("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 Signed-off-by:
Sasha Levin <sashal@kernel.org>
parent
014a807f
Please register or sign in to comment