b4d02baa9f
Patch series "mm: remove total_mapcount()", v2. Let's remove the remaining user from mm/memfd.c so we can get rid of total_mapcount(). This patch (of 2): Both functions are the remaining users of total_mapcount(). Let's get rid of the calls by converting the code to folios. As it turns out, the code is unnecessarily complicated, especially: 1) We can query the number of pagecache references for a folio simply via folio_nr_pages(). This will handle other folio sizes in the future correctly. 2) The xas_set(xas, page->index + cache_count) call to increment the iterator for large folios is not required. Remove it. Further, simplify the XA_CHECK_SCHED check, counting each entry exactly once. Memfd pages can be swapped out when using shmem; leave xa_is_value() checks in place. Link: https://lkml.kernel.org/r/20240226141324.278526-1-david@redhat.com Link: https://lkml.kernel.org/r/20240226141324.278526-2-david@redhat.com Co-developed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
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| tools | ||
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| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
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| README | ||
README
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.