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a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=6IFa9wvqVegA:10 a=GoEa3M9JfhUA:10 a=XYAwZIGsAAAA:8 a=d_txRPmOw5E24vjTJUEA:9 a=QEXdDO2ut3YA:10 a=E8ToXWR_bxluHZ7gmE-Z:22 cc=ntf awl=host:13207 X-Proofpoint-ORIG-GUID: pPsYWjpvo_6eu0RNgrClISeUJH_52moj X-Proofpoint-GUID: pPsYWjpvo_6eu0RNgrClISeUJH_52moj X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjE5MDA5MCBTYWx0ZWRfXwn5GSaR9Wii7 NPt7D+Z+llCin9+vEKToYi7E39uavwIt8d0+mUSFCRNZPZykKrXRcFXi3b9VoT2aAseH5Fm1CqE 9n8XZ56DVGBlNR8owafHzb2ut62YxlsT1K7+KW3j0giGZI9hJ6o4eLaR1Q34xBFNcpfO+Hq35f0 qVuL+2cv9qI2EE3adQ97RqPc3pY+dRJjK+AHizDwpiLyGRu25/LJZEF9rd+GuZ4IwbL3qEKXcQA 7265ohIhBOrPyGT8JTQzUydvMRnZqMqhyX80T/mfU6EWz0cZ3/FdeveyCfdFrhvD33jaKX/cRKF b8a6VV9OQBmbP7bietP9Kj6uCwCDe0WFO0o8MXcoIKbNz9I3bmGNdsmvEGqyeur4IKNGidKmxXM rvZoRae1+ROEigksA3vUVa7tKL7W1Jkh1pl7g7w5I8SOYrVAJgiPjOCvXX17FtfGtqgSN15F On 18/06/2025 20:24, John Meneghini wrote: > From: Sagar Biradar > > From: Sagar Biradar > > This patch fixes a bug in the original path that caused I/O hangs. The > I/O hangs were because of an MSIx vector not having a mapped online CPU > upon receiving completion. > > This patch enables Multi-Q support in the aacriad driver. Multi-Q support > in the driver is needed to support CPU offlining. I assume that you mean "safe" CPU offlining. It seems to me that in all cases we use queue interrupt affinity spreading and managed interrupts for MSIX, right? See aac_define_int_mode() -> pci_alloc_irq_vectors(..., PCI_IRQ_MSIX | PCI_IRQ_AFFINITY); But then for this non- Multi-Q support, the queue seems to be chosen based on a round-robin approach in the driver. That round-robin comes from how fib.vector_no is assigned in aac_fib_vector_assign(). If this is the case, then why are managed interrupts being used for this non- Multi-Q support at all? I may be wrong about this. That driver is hard to understand with so many knobs.