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commit 584db20c181f5e28c0386d7987406ace7fbd3e49 upstream. Patch series "nilfs2: Folio conversions for directory paths". This series applies page->folio conversions to nilfs2 directory operations. This reduces hidden compound_head() calls and also converts deprecated kmap calls to kmap_local in the directory code. Although nilfs2 does not yet support large folios, Matthew has done his best here to include support for large folios, which will be needed for devices with large block sizes. This series corresponds to the second half of the original post [1], but with two complementary patches inserted at the beginning and some adjustments, to prevent a kmap_local constraint violation found during testing with highmem mapping. [1] https://lkml.kernel.org/r/20231106173903.1734114-1-willy@infradead.org I have reviewed all changes and tested this for regular and small block sizes, both on machines with and without highmem mapping. No issues found. This patch (of 17): In a few directory operations, the call to nilfs_put_page() for a page obtained using nilfs_find_entry() or nilfs_dotdot() is hidden in nilfs_set_link() and nilfs_delete_entry(), making it difficult to track page release and preventing change of its call position. By moving nilfs_put_page() out of these functions, this makes the page get/put correspondence clearer and makes it easier to swap nilfs_put_page() calls (and kunmap calls within them) when modifying multiple directory entries simultaneously in nilfs_rename(). Also, update comments for nilfs_set_link() and nilfs_delete_entry() to reflect changes in their behavior. To make nilfs_put_page() visible from namei.c, this moves its definition to nilfs.h and replaces existing equivalents to use it, but the exposure of that definition is temporary and will be removed on a later kmap -> kmap_local conversion. Link: https://lkml.kernel.org/r/20231127143036.2425-1-konishi.ryusuke@gmail.com Link: https://lkml.kernel.org/r/20231127143036.2425-2-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Stable-dep-of: ee70999a988b ("nilfs2: handle errors that nilfs_prepare_chunk() may return") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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 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.