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Currently the size of memory we allocate for SATA breakpoint buffer is incorrect. The breakpoint memory size should be as follows: 32 (NCQ tags) * 128 * 2048 (max #devs) = 8MB Currently we only allocate 0.5MB, but get away with it as we never have SATA device index > 128 typically. To conserve precious DMA memory (8MB may not be even available), limit the number of devices per HBA to 1024, which means 4MB of memory required for SATA breakpoint. The 1024 device limit applied to all HW versions. For v3 hw, we need to configure this value. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.