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0c1a147481
Add a sysfs attribute aq_timeouts that controls after how many timeouts a autoquiesce event might be triggered. The default value is 32768 which is the maximum number of retries for the DASD device driver DASD_RETRIES_MAX. This means that the timeout trigger will never happen. The default value for DASD retries is 255. Setting the value to below 255 will trigger the timeout autoquiesce event before an IO error is generated. Also add the check for the configured amount of timeouts and trigger an autoquiesce event if exceeded. Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Link: https://lore.kernel.org/r/20230405142017.2446986-6-sth@linux.ibm.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 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.