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5a3a2d83cd
Currently in F2FS, page faults and operations that truncate the pagecahe or data blocks, are completely unsynchronized. This can result in page fault faulting in a page into a range that we are changing after truncating, and thus we can end up with a page mapped to disk blocks that will be shortly freed. Filesystem corruption will shortly follow. This patch fixes the problem by creating new rw semaphore i_mmap_sem in f2fs_inode_info and grab it for functions removing blocks from extent tree and for read over page faults. The mechanism is similar to that in ext4. Signed-off-by: Qiuyang Sun <sunqiuyang@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.