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Quoted from commit3da40c7b08("ext4: only call ext4_truncate when size <= isize") " At LSF we decided that if we truncate up from isize we shouldn't trim fallocated blocks that were fallocated with KEEP_SIZE and are past the new i_size. This patch fixes ext4 to do this. " And generic/092 of fstest have covered this case for long time, however is_quota_modification() didn't adjust based on that rule, so that in below condition, we will lose to quota block change: - fallocate blocks beyond EOF - remount - truncate(file_path, file_size) Fix it. Link: https://lore.kernel.org/r/20190911093650.35329-1-yuchao0@huawei.com Fixes:3da40c7b08("ext4: only call ext4_truncate when size <= isize") CC: stable@vger.kernel.org Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jan Kara <jack@suse.cz>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.