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862590ac37
Currently we free the reclaimed slots through slot cache even if the slot is required to be empty immediately. As a result the reclaim caller will see the slot still occupied even after a successful reclaim, and need to keep reclaiming until slot cache get flushed. This caused ineffective or over reclaim when SWAP is under stress. So introduce a new flag allowing the slot to be emptied bypassing the slot cache. [21cnbao@gmail.com: small folios should have nr_pages == 1 but not nr_page == 0] Link: https://lkml.kernel.org/r/20240805015324.45134-1-21cnbao@gmail.com Link: https://lkml.kernel.org/r/20240730-swap-allocator-v5-6-cb9c148b9297@kernel.org Signed-off-by: Kairui Song <kasong@tencent.com> Reported-by: Barry Song <21cnbao@gmail.com> Cc: Chris Li <chrisl@kernel.org> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Kalesh Singh <kaleshsingh@google.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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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.