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System Configuration
OS: Ubuntu 22.04 LTS
Kernel: 5.15.0-25-generic
CPUs: 256
NIC: Intel E810 NIC with 512 MSIx vectors each function
Errors
Not enough device MSI-X vectors, requested = 260, available = 253
Findings
(1) the current ice kernel driver (ice_main.c) will pre-allocate all
required number of msix (even it's not enough for big core CPUs)
(2) the commit
https://github.com/torvalds/linux/commit/ce4626131112e1d0066a890371e14d8091323f99
has improved this logic, and it seems merged into kernel version from v6.1
So for supporting the new CPUs with more than 252 vCPUs, will Ubuntu kernel
backport above patch to the current kernel (v5.15) ?
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Ubuntu 22.04 raise abnormal NIC MSI-X requests with larger CPU cores (256)
https://bugs.launchpad.net/bugs/2012335
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