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This patch adds necessary fields in the target data structures to support error log page. For a target controller, we add a new error log field to maintain the error log, at any given point we maintain error entries equal to NVMET_ERROR_LOG_SLOTS for each controller. In the following patch, we also update the error log page entry in the I/O completion path so we introduce a spinlock for synchronization of the log. For nvmet_req, we add a new field error_loc to hold the location of the error in the command when the actual error occurs for each request and a starting LBA if applicable. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
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.