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We will write /proc/net/rpc/xxx/flush if we want to clean cache_detail. This updates nextcheck to the current time and calls cache_flush --> cache_clean to clean cache_detail. If we write this interface again within one second, it will only increase flush_time and nextcheck without actually cleaning cache_detail. Therefore, if we keep writing this interface repeatedly within one second, flush_time and nextcheck will keep increasing, even far exceeding the current time, making it impossible to clear cache_detail through the flush interface or cache_cleaner. If someone frequently calls the flush interface, we should immediately clean the corresponding cache_detail instead of continuously accumulating nextcheck. Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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.