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7d82240c45
After enabling large data folios for tests, I hit the ASSERT() inside GET_SUBPAGE_BITMAP() where blocks_per_folio matches BITS_PER_LONG. The ASSERT() itself is only based on the original subpage fs block size, where we have at most 16 blocks per page, thus "ASSERT(blocks_per_folio < BITS_PER_LONG)". However the experimental large data folio support will set the max folio order according to the BITS_PER_LONG, so we can have a case where a large folio contains exactly BITS_PER_LONG blocks. So the ASSERT() is too strict, change it to "ASSERT(blocks_per_folio <= BITS_PER_LONG)" to avoid the false alert. Reviewed-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me> Reviewed-by: Boris Burkov <boris@bur.io> Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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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.