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dac2a4f663
Since commitd2d7867140("mm/hugetlb: enable bootmem allocation from CMA areas"), a flag is used to mark hugetlb folios as allocated from CMA. This flag is also used to decide if it should be freed to CMA. However, the flag isn't copied to the smaller folios when a hugetlb folio is broken up for demotion, which would cause it to be freed incorrectly. Fix this by copying the flag to the smaller order hugetlb pages created from the original one. Link: https://lkml.kernel.org/r/20250501044325.20365-1-fvdl@google.com Fixes:d2d7867140("mm/hugetlb: enable bootmem allocation from CMA areas") Signed-off-by: Frank van der Linden <fvdl@google.com> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Jane Chu <Jane.Chu@oracle.com> Cc: Muchun Song <muchun.song@linux.dev> 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 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.