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c372cdd1ef
The largest allowed transfer is 4MB, which can use at most 1025 PRPs. Each PRP is 8 bytes, so the maximum number of 4k nvme pages needed for the iod_list is 3, which fits in an 's8' type. While modifying this field, change the name to "nr_allocations" to better represent that this is referring to the number of units allocated from a dma_pool. Also introduce a BUILD_BUG_ON to ensure we never accidently increase the largest transfer limit beyond 127 chained prp lists. Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de> |
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
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| virt | ||
| .clang-format | ||
| .cocciconfig | ||
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| README | ||
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.