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Alex Shi
3db19aa39b
In the func munlock_vma_page, comments mentained lru_lock needed for serialization with split_huge_pages. But the page must be PageLocked as well as pages in split_huge_page series funcs. Thus the PageLocked is enough to serialize both funcs. Further more, Hugh Dickins pointed: before splitting in split_huge_page_to_list, the page was unmap_page() to remove pmd/ptes which protect the page from munlock. Thus, no needs to guard __split_huge_page_tail for mlock clean, just keep the lru_lock there for isolation purpose. LKP found a preempt issue on __mod_zone_page_state which need change to mod_zone_page_state. Thanks! Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Alex Shi <[email protected]> Acked-by: Hugh Dickins <[email protected]> Acked-by: Johannes Weiner <[email protected]> Acked-by: Vlastimil Babka <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Cc: Alexander Duyck <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: "Chen, Rong A" <[email protected]> Cc: Daniel Jordan <[email protected]> Cc: "Huang, Ying" <[email protected]> Cc: Jann Horn <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Cc: Konstantin Khlebnikov <[email protected]> Cc: Matthew Wilcox (Oracle) <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mika Penttilä <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Shakeel Butt <[email protected]> Cc: Tejun Heo <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vladimir Davydov <[email protected]> Cc: Wei Yang <[email protected]> Cc: Yang Shi <[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.