ca56489c2f
While stress-testing zswap a memory corruption was happening when writing back pages. __frontswap_store used to check for duplicate entries before attempting to store a page in zswap, this was because if the store fails the old entry isn't removed from the tree. This change removes duplicate entries in zswap_store before the actual attempt. [cerasuolodomenico@gmail.com: add a warning and a comment, per Johannes] Link: https://lkml.kernel.org/r/20230925130002.1929369-1-cerasuolodomenico@gmail.com Link: https://lkml.kernel.org/r/20230922172211.1704917-1-cerasuolodomenico@gmail.com Fixes: 42c06a0e8ebe ("mm: kill frontswap") Signed-off-by: Domenico Cerasuolo <cerasuolodomenico@gmail.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Nhat Pham <nphamcs@gmail.com> Cc: Dan Streetman <ddstreet@ieee.org> Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com> Cc: Seth Jennings <sjenning@redhat.com> Cc: Vitaly Wool <vitaly.wool@konsulko.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.