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2df79e4d72
The "soft-reserved" memory regions (EFI_MEMORY_SP) are added to the memblock.reserved, but not to the memblock.memory. It causes memblock_estimated_nr_free_pages() to return a value smaller value than expected, or if it underflows, an extremely large value. Calculate the number of estimated free pages using memblock_reserved_kern_size() instead of memblock_reserved_size() to fix the issue. -----BEGIN PGP SIGNATURE----- iQFEBAABCgAuFiEEeOVYVaWZL5900a/pOQOGJssO/ZEFAmkda44QHHJwcHRAa2Vy bmVsLm9yZwAKCRA5A4Ymyw79kWR1B/0XkJdjP2gH7fxnAZc2h2f3zsRQP/70Hcgr xJy7UE7+2e6KWLzl8vcI4Oyr+7cRbtAa6AYfk2HTcIP+M2Af34kzVgLZceuAW/zr bpyaNV7t23CcQwtY+6etGM2Nlzw6lTi/BF+EAS+rcgx5lrKJ0wpACm/1tplU3nJB DKfumkJgQt02tgwBByXB0SXUjcntiQ/uEWm27EJvD6YTDOprt9316G+7GPRPVaOy y0Se9dFqZ7xWP2sWWwYiSyS57fPgBSB7+XR8/bnsutib8GvA6AmYUaJdo5MavlYZ mz3ZHmvjb0acCDgvrV564RLp23lX29WPSvHFwrlyU4v1g5pDv4dt =tr0l -----END PGP SIGNATURE----- Merge tag 'fixes-2025-11-19' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock Pull memblock fix from Mike Rapoport: "Fix memblock_estimated_nr_free_pages() for soft-reserved memory The "soft-reserved" memory regions (EFI_MEMORY_SP) are added to the memblock.reserved, but not to the memblock.memory. It causes memblock_estimated_nr_free_pages() to return a value smaller value than expected, or if it underflows, an extremely large value. Calculate the number of estimated free pages using memblock_reserved_kern_size() instead of memblock_reserved_size() to fix the issue" * tag 'fixes-2025-11-19' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock: memblock: fix memblock_estimated_nr_free_pages() for soft-reserved memory |
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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.