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Under DNE mode, if we do not restrict the linkEA size, and if there are too many cross-MDTs hard links to the same object, then it will cause the llog overflow. On the other hand, too many linkEA entries in the linkEA will serious affect the linkEA performance because we only support to locate linkEA entry consecutively. So we need to restrict the linkEA size. Currently, it is 4096 bytes, that is independent from the backend. If too many hard links caused the linkEA overflowed, we will add overflow timestamp in the linkEA header. Signed-off-by: Fan Yong <fan.yong@intel.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8569 Reviewed-on: https://review.whamcloud.com/23500 Reviewed-by: Andreas Dilger <andreas.dilger@intel.com> Reviewed-by: wangdi <di.wang@intel.com> Reviewed-by: Lai Siyao <lai.siyao@intel.com> Reviewed-by: Oleg Drokin <oleg.drokin@intel.com> Signed-off-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.