76a0fb4fd5
The current memory reclaim delay statistics only count the direct memory reclaim of the task in do_try_to_free_pages(). In systems with NUMA open, some tasks occasionally experience slower response times, but the total count of reclaim does not increase, using ftrace can show that node_reclaim has occurred. The memory reclaim occurring in get_page_from_freelist() is also due to heavy memory load. To get the impact of tasks in memory reclaim, this patch adds the statistics of the memory reclaim delay statistics for __node_reclaim(). Link: https://lkml.kernel.org/r/181C946095F0252B+7cc60eca-1abf-4502-aad3-ffd8ef89d910@ex.bilibili.com Signed-off-by: Wen Yu Li <wenyuli@ex.bilibili.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: <wangyun@bilibili.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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.