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5f798beaf3
Requests may be prepared multiple times with ->io allocated (i.e. async prepared). Preparation functions don't handle it and forget about previously allocated resources. This may happen in case of: - spurious defer_check - non-head (i.e. async prepared) request executed in sync (via nxt). Make the handlers check, whether they already allocated resources, which is true IFF REQ_F_NEED_CLEANUP is set. Cc: stable@vger.kernel.org # 5.5 Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.