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17cd07ae95
As Jayashree Mohan reported: A simple workload to reproduce this would be : 1. create foo 2. Write (8K - 16K) // foo size = 16K now 3. fsync() 4. falloc zero_range , keep_size (4202496 - 4210688) // foo size must be 16K 5. fdatasync() Crash now On recovery, we see that the file size is 4210688 and not 16K, which violates the semantics of keep_size flag. We have a test case to reproduce this using CrashMonkey on 4.15 kernel. Try this out by simply running : ./c_harness -f /dev/sda -d /dev/cow_ram0 -t f2fs -e 102400 -P -v tests/generic_468_zero.so The root cause is that we miss to set KEEP_SIZE bit correctly in zero_range when zeroing block cross EOF with FALLOC_FL_KEEP_SIZE, let's fix this missing case. Signed-off-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.