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This patch greatly reduces the unneeded complexity in the i40e_detect_recover_hung_queue code path. The previous implementation set a 'hung bit' which would then get cleared while polling. If the detection routine was called a second time with the bit already set, we would issue a software interrupt. This patch makes it such that if interrupts are disabled and we have pending TX descriptors, we trigger a software interrupt since in, the worst case, queues are already clean and we have an extra interrupt. Additionally this patch removes the workaround for lost interrupts as calling napi_reschedule in this context can cause software interrupts to fire on the wrong CPU. Change-ID: Iae108582a3ceb6229ed1d22e4ed6e69cf97aad8d Signed-off-by: Alan Brady <alan.brady@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> |
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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.