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We can use sbitmap to manage all the nvmet_rdma_rsp instead of using free lists and spinlock, and we can use an additional tag to determine whether the nvmet_rdma_rsp is extra allocated. In addition, performance has improved: 1. testing environment is local rxe rdma devie and mem-based backstore device. 2. fio command, test the average 5 times: fio -filename=/dev/nvme0n1 --ioengine=libaio -direct=1 -size=1G -name=1 -thread -runtime=60 -time_based -rw=read -numjobs=16 -iodepth=128 -bs=4k -group_reporting 3. Before: 241k IOPS, After: 256k IOPS, an increase of about 5%. Signed-off-by: Guixin Liu <kanie@linux.alibaba.com> Reviewed-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 reStructuredText 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.