mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-12-27 17:01:25 -05:00
152c331bcd
This patch aims to enable batch allocation of sufficient tags after batch IO submission with plug mechanism, thereby avoiding the need for frequent individual requests when the initial allocation is insufficient. ----------------------------------------------------------- HW: 16 CPUs/16 poll queues Disk: Samsung PM9A3 Gen4 3.84T CMD: [global] ioengine=io_uring group_reporting=1 time_based=1 runtime=1m refill_buffers=1 norandommap=1 randrepeat=0 fixedbufs=1 registerfiles=1 rw=randread iodepth=128 iodepth_batch_submit=32 iodepth_batch_complete_min=32 iodepth_batch_complete_max=128 iodepth_low=32 bs=4k numjobs=1 direct=1 hipri=1 [job1] filename=/dev/nvme0n1 name=batch_test ------------------------------------------------------------ Perf: base code: __blk_mq_alloc_requests() 1.47% patch: __blk_mq_alloc_requests() 0.75% ------------------------------------------------------------ Signed-off-by: hexue <xue01.he@samsung.com> Reviewed-by: Ming Lei <ming.lei@redhat.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 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.