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aba19ee71c
Move flush queue allocation into blk_mq_init_hctx() and its release into blk_mq_exit_hctx(), and prepare for replacing tags->lock with SRCU to draining inflight request walking. blk_mq_exit_hctx() is the last chance for us to get valid `tag_set` reference, and we need to add one SRCU to `tag_set` for freeing flush request via call_srcu(). It is safe to move flush queue & request release into blk_mq_exit_hctx(), because blk_mq_clear_flush_rq_mapping() clears the flush request reference int driver tags inflight request table, meantime inflight request walking is drained. Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Yu Kuai <yukuai3@huawei.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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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.