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c294ea50da
Six locks do lock handoff via the wakeup path: the thread doing the wakeup also takes the lock on behalf of the waiter, which means the waiter only has to look at its waitlist entry, and doesn't have to touch the lock cacheline while another thread is using it. Linus noticed that this needs a real barrier, which this patch fixes. Also add a comment for the should_sleep_fn() error path. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: linux-bcachefs@vger.kernel.org Cc: linux-kernel@vger.kernel.org |
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| fs | ||
| include | ||
| init | ||
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| ipc | ||
| kernel | ||
| lib | ||
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| .clang-format | ||
| .cocciconfig | ||
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| 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.