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8a399e2f60
Now we rely on the "frozen" bit to see if we should manipulate the slab->slab_list, which will be changed in the following patch. Instead we introduce another way to keep track of whether slub is on the per-node partial list, here we reuse the PG_workingset bit. We have to use the atomic set_bit() and clear_bit() variants and change slab_unlock() to bit_spin_unlock() because when cmpxchg is not available and PG_lock is used, there may be concurrent operations on the two bits. Thanks to Mark Brown for reporting a hang and testing of a previous version where the non-atomic operations were used. Suggested-by: Matthew Wilcox <willy@infradead.org> Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Vlastimil Babka <vbabka@suse.cz> |
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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.