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In some scenarios START STOP UNIT may time out. The default recovery time of 30 seconds is relatively large. Modifying rq_timeout to adjust the START STOP UNIT timeout value will affect the regular I/O. Commit9728c0814e("[SCSI] make scsi_eh_try_stu use block timeout") switched to rq_timeout for the START STOP UNIT command. However commit0816c9251a("[SCSI] Allow error handling timeout to be specified") introduced an explicit eh_timeout parameter. It makes more sense to use this value as the timeout for START STOP UNIT. Link: https://lore.kernel.org/r/1636507412-21678-1-git-send-email-brookxu.cn@gmail.com Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Wu Bo <wubo40@huawei.com> Signed-off-by: Chunguang Xu <brookxu@tencent.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.
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.