bcd49e8671
The code path to reclaim the swap entry in free_swap_and_cache() is almost same as that of __try_to_reclaim_swap(). The largest difference is just coding style. So the support to the additional requirement of free_swap_and_cache() is added into __try_to_reclaim_swap(). free_swap_and_cache() is changed to call __try_to_reclaim_swap(), and delete the duplicated code. This will improve code readability and reduce the potential bugs. There are 2 functionality differences between __try_to_reclaim_swap() and swap entry reclaim code of free_swap_and_cache(). - free_swap_and_cache() only reclaims the swap entry if the page is unmapped or swap is getting full. The support has been added into __try_to_reclaim_swap(). - try_to_free_swap() (called by __try_to_reclaim_swap()) checks pm_suspended_storage(), while free_swap_and_cache() not. I think this is OK. Because the page and the swap entry can be reclaimed later eventually. Link: http://lkml.kernel.org/r/20180827075535.17406-2-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Shaohua Li <shli@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@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.