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74a37ce697
There are reports of mariadb hangs, which is caused by a missing barrier in the waking code resulting in waiters losing events. The problem was introduced in a backport3ab9326f93("io_uring: wake up optimisations"), and the change restores the barrier present in the original commit3ab9326f93("io_uring: wake up optimisations") Reported by: Xan Charbonnet <xan@charbonnet.com> Fixes:3ab9326f93("io_uring: wake up optimisations") Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1093243#99 Reviewed-by: Li Zetao <lizetao1@huawei.com> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.