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When all layers are on the same fs, and iterating a directory which may contain copy up entries, call vfs_getattr() on the overlay entries to make sure that d_ino will be consistent with st_ino from stat(2). There is an overhead of lookup per upper entry in readdir. The overhead is minimal if the iterated entries are already in dcache. It is also quite useful for the common case of 'ls -l' that readdir() pre populates the dcache with the listed entries, making the following stat() calls faster. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> |
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| README | ||
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.