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c2c54b5f34
ovl_fsync() with !datasync opens a backing file from the top most dentry in the stack, checks if this dentry is non-upper and skips the fsync. In case of an overlay dentry stack with lower data and lower metadata above it, but without an upper metadata above it, the backing file is opened from the top most lower metadata dentry and never used. Refactor the helper ovl_real_fdget_meta() into ovl_real_fdget_path() and open code the checks for non-upper inode in ovl_fsync(), so in that case we can avoid the unneeded backing file open. Signed-off-by: Amir Goldstein <amir73il@gmail.com> |
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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 reStructuredText 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.