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e20fff8a1f
scsi_device_block() is only called from scsi_target_block(), which calls it repeatedly for every child device. For targets with many devices, waiting for every queue to quiesce may cause a substantial delay (we measured more than 100s delay for blocking a FC rport with 2048 LUNs). Just call blk_mq_wait_quiesce_done() once from scsi_target_block() after stopping all queues. Signed-off-by: Martin Wilck <mwilck@suse.com> Link: https://lore.kernel.org/r/20230614103616.31857-6-mwilck@suse.com Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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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 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.