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7eee4b9218
Currently we use DQ lock to protect delivery of DQ entry one by one. To optimise to allow more than one slot to be built for a single DQ in parallel, we need to remove the DQ lock when preparing slots, prior to delivery. To achieve this, we rearrange the slot build order to ensure that once we allocate a slot for a task, we do cannot fail to deliver the task. In this patch, we rearrange the slot building for SMP tasks to ensure that sg mapping part (which can fail) happens before we allocate the slot in the DQ. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.