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git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Peter Xu
4eae4efa2c
This is the last missing piece of the COW-during-fork effort when there're pinned pages found. One can reference70e806e4e6("mm: Do early cow for pinned pages during fork() for ptes", 2020-09-27) for more information, since we do similar things here rather than pte this time, but just for hugetlb. Note that after Jason's recent work on57efa1fe59("mm/gup: prevent gup_fast from racing with COW during fork", 2020-12-15) which is safer and easier to understand, we're safe now within the whole copy_page_range() against gup-fast, we don't need the wr-protect trick that proposed in70e806e4e6anymore. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Peter Xu <[email protected]> Reviewed-by: Mike Kravetz <[email protected]> Reviewed-by: Jason Gunthorpe <[email protected]> Cc: Alexey Dobriyan <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: David Airlie <[email protected]> Cc: David Gibson <[email protected]> Cc: Gal Pressman <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jann Horn <[email protected]> Cc: Kirill Shutemov <[email protected]> Cc: Kirill Tkhai <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Miaohe Lin <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Roland Scheidegger <[email protected]> Cc: VMware Graphics <[email protected]> Cc: Wei Zhang <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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.