Hi!
Trying to build a minimal kernel I dropped CONFIG_IRQ_REMAP=y from
my config, and (on AMD) that caused IRQ shortage.
This seems to crash ice after commit ad61cd9c67ad ("ice: get rid of
num_lan_msix field"). Sorry for the lack of line numbers, I also
dropped DEBUG_INFO. But I think the problem itself is pretty obvious.
The fix less so, short of reverting ad61cd9c67ad. We can't just clamp
the queues in ice_vsi_alloc_q_vectors() because AFAICT that would make
ethtool -L succeed but driver would have a lower queue count than
requested.
[ 80.931193] kselftest: Running tests in drivers/net
[ 81.071248] ice 0000:e1:00.0 ens1f0np0: Dedicated RX or TX channels cannot
be used simultaneously
[ 81.090784] ice 0000:e1:00.0 ens1f0np0: Dedicated RX or TX channels cannot
be used simultaneously
[ 81.103099] ice 0000:e1:00.0: Failed to allocate 32 q_vectors for VSI 6, new
value 8
2026-03-15 14:51:18.171508 [ 81.123795] ------------[ cut here ]------------
[ 81.128979] WARNING: net/core/dev.c:2861 at
__netif_set_xps_queue+0x90a/0xb10, CPU#30: python3/3163
[ 81.139148] Modules linked in:
[ 81.142587] CPU: 30 UID: 0 PID: 3163 Comm: python3 Not tainted
7.0.0-rc3-banc-g76f4f4965ab1 #1 PREEMPT(lazy)
[ 81.153728] Hardware name: Giga Computing E163-Z34-AAH1-000/MZ33-DC1-000,
BIOS R30_F44 12/24/2025
[ 81.163696] RIP: 0010:__netif_set_xps_queue+0x90a/0xb10
[ 81.169562] Code: 10 48 c7 04 c2 00 00 00 00 e8 62 88 64 ff e9 95 fe ff ff
45 31 c9 bf 40 00 00 00 45 31 d2 41 bb 14 00 00 00 e9 e7 f8 ff ff 90 <0f> 0b 90
e9 1d f7 ff ff 48 8b 5c 24 28 41 0f b7 c7 48 8d 04 80 48
[ 81.190649] RSP: 0018:ff70e7fbedc0b7e8 EFLAGS: 00010246
[ 81.196522] RAX: ff25cc4a83409000 RBX: 0000000000000008 RCX: 0000000000000000
[ 81.204541] RDX: 0000000000000008 RSI: ff25cc4a809a6468 RDI: 0000000000000008
[ 81.212559] RBP: ff70e7fbedc0b928 R08: ff25cc4a809a6468 R09: ff25cc4a832fa840
[ 81.220575] R10: ff70e7fbe204e460 R11: ff25cc4a81beb0c8 R12: ff70e7fbedc0b8b8
[ 81.228590] R13: ff25cc4a98c13828 R14: 0000000000000000 R15: 0000000000000008
[ 81.236610] FS: 00007efe2b50af00(0000) GS:ff25cc6225af0000(0000)
knlGS:0000000000000000
[ 81.245701] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 81.252150] CR2: 000055c982e676a8 CR3: 000000014927c006 CR4: 0000000000771ef0
[ 81.260169] PKRU: 55555554
[ 81.263202] Call Trace:
[ 81.265954] <TASK>
[ 81.268315] ? ice_ena_vsi_txq+0x1eb/0x300
[ 81.272924] netif_set_xps_queue+0x2c/0x40
[ 81.277522] ice_vsi_cfg_txq+0x221/0x2a0
[ 81.281937] ice_vsi_cfg_lan_txqs+0x60/0x90
[ 81.286640] ice_vsi_cfg_lan+0x24/0xf0
[ 81.290856] ice_vsi_open+0x8a/0x180
[ 81.294876] ice_vsi_recfg_qs+0x10f/0x160
[ 81.299384] ice_set_channels+0x161/0x2b0
[ 81.303893] ethnl_set_channels+0x187/0x2b0
[ 81.308601] ethnl_default_set_doit+0xf6/0x200
[ 81.313596] genl_family_rcv_msg_doit+0xf3/0x150
[ 81.318783] genl_rcv_msg+0x1a1/0x2a0
[ 81.322902] ? ethnl_notify+0xb0/0xb0
[ 81.327014] ? genl_family_rcv_msg_dumpit+0xf0/0xf0
[ 81.332496] netlink_rcv_skb+0x54/0x100
[ 81.336811] genl_rcv+0x23/0x30
[ 81.340333] netlink_unicast+0x250/0x380
[ 81.344745] netlink_sendmsg+0x1ed/0x410
[ 81.349156] __sock_sendmsg+0x33/0x60
[ 81.353277] __sys_sendto+0x120/0x170
[ 81.357397] ? file_has_perm+0xcf/0xe0
[ 81.361614] __x64_sys_sendto+0x1f/0x30
[ 81.365926] do_syscall_64+0xe2/0x570
[ 81.370045] ? exc_page_fault+0x65/0x160
[ 81.374456] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 81.380128] RIP: 0033:0x7efe2b66fc5e
[ 81.384150] Code: 4d 89 d8 e8 34 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00
59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83
e2 39 83 fa 08 75 e7 e8 13 ff ff ff 0f 1f 00 f3 0f 1e fa
[ 81.405234] RSP: 002b:00007ffc680ce3f0 EFLAGS: 00000202 ORIG_RAX:
000000000000002c
[ 81.413729] RAX: ffffffffffffffda RBX: 00007ffc680ce500 RCX: 00007efe2b66fc5e
[ 81.421747] RDX: 0000000000000038 RSI: 00007efe2ac6c410 RDI: 0000000000000006
[ 81.429762] RBP: 00007ffc680ce400 R08: 0000000000000000 R09: 0000000000000000
[ 81.437778] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
[ 81.445798] R13: 00007efe2abc1160 R14: 0000000000000000 R15: 00007efe2aee6390
[ 81.453806] </TASK>
[ 81.456266] ---[ end trace 0000000000000000 ]---
[ 81.463586] BUG: unable to handle page fault for address: 0000000e00001039
[ 81.471309] #PF: supervisor read access in kernel mode
[ 81.477080] #PF: error_code(0x0000) - not-present page
[ 81.482852] PGD 13ce4f067 P4D 0
[ 81.486481] Oops: Oops: 0000 [#1] SMP
[ 81.490596] CPU: 30 UID: 0 PID: 3163 Comm: python3 Tainted: G W
7.0.0-rc3-banc-g76f4f4965ab1 #1 PREEMPT(lazy)
[ 81.503488] Tainted: [W]=WARN
[ 81.506822] Hardware name: Giga Computing E163-Z34-AAH1-000/MZ33-DC1-000,
BIOS R30_F44 12/24/2025
[ 81.516789] RIP: 0010:__netif_set_xps_queue+0x6e/0xb10
[ 81.522561] Code: 89 f3 85 f6 0f 88 77 03 00 00 41 0f b7 c7 48 8d 04 80 48
c1 e0 06 48 03 42 18 48 8b 40 70 48 85 c0 0f 84 ff 02 00 00 45 31 d2 <66> 83 78
36 00 48 89 44 24 28 0f 85 ec 02 00 00 48 c7 c7 60 ba 48
[ 81.543643] RSP: 0018:ff70e7fbedc0b7e8 EFLAGS: 00010246
[ 81.549513] RAX: 0000000e00001003 RBX: 0000000000000001 RCX: 0000000000000000
[ 81.557527] RDX: ff25cc4a83409000 RSI: 0000000000000001 RDI: 000000000000000d
[ 81.565540] RBP: ff70e7fbedc0b928 R08: ff25cc4a809a6490 R09: ff25cc4a832fa480
[ 81.573553] R10: 0000000000000000 R11: ff25cc4a81beb0c8 R12: ff70e7fbedc0b8b8
[ 81.581565] R13: ff25cc4a98c13828 R14: 0000000000000000 R15: 000000000000000d
[ 81.589579] FS: 00007efe2b50af00(0000) GS:ff25cc6225af0000(0000)
knlGS:0000000000000000
[ 81.598666] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 81.605120] CR2: 0000000e00001039 CR3: 000000014927c006 CR4: 0000000000771ef0
[ 81.613132] PKRU: 55555554
[ 81.616175] Call Trace:
[ 81.618925] <TASK>
[ 81.621286] ? ice_ena_vsi_txq+0x1eb/0x300
[ 81.625890] netif_set_xps_queue+0x2c/0x40
[ 81.630493] ice_vsi_cfg_txq+0x221/0x2a0
[ 81.634901] ice_vsi_cfg_lan_txqs+0x60/0x90
[ 81.639601] ice_vsi_cfg_lan+0x24/0xf0
[ 81.643815] ice_vsi_open+0x8a/0x180
[ 81.647832] ice_vsi_recfg_qs+0x10f/0x160
[ 81.652338] ice_set_channels+0x161/0x2b0
[ 81.656842] ethnl_set_channels+0x187/0x2b0
[ 81.661543] ethnl_default_set_doit+0xf6/0x200
[ 81.666536] genl_family_rcv_msg_doit+0xf3/0x150
[ 81.671724] genl_rcv_msg+0x1a1/0x2a0
[ 81.675840] ? ethnl_notify+0xb0/0xb0
[ 81.679955] ? genl_family_rcv_msg_dumpit+0xf0/0xf0
[ 81.685434] netlink_rcv_skb+0x54/0x100
[ 81.689745] genl_rcv+0x23/0x30
[ 81.693276] netlink_unicast+0x250/0x380
[ 81.697683] netlink_sendmsg+0x1ed/0x410
[ 81.702092] __sock_sendmsg+0x33/0x60
[ 81.706206] __sys_sendto+0x120/0x170
[ 81.710320] ? file_has_perm+0xcf/0xe0
[ 81.714533] __x64_sys_sendto+0x1f/0x30
[ 81.718843] do_syscall_64+0xe2/0x570
[ 81.722957] ? exc_page_fault+0x65/0x160
[ 81.727365] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 81.733039] RIP: 0033:0x7efe2b66fc5e
[ 81.737057] Code: 4d 89 d8 e8 34 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00
59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83
e2 39 83 fa 08 75 e7 e8 13 ff ff ff 0f 1f 00 f3 0f 1e fa
[ 81.758138] RSP: 002b:00007ffc680ce3f0 EFLAGS: 00000202 ORIG_RAX:
000000000000002c
[ 81.766643] RAX: ffffffffffffffda RBX: 00007ffc680ce500 RCX: 00007efe2b66fc5e
[ 81.774656] RDX: 0000000000000038 RSI: 00007efe2ac6c410 RDI: 0000000000000006
[ 81.782668] RBP: 00007ffc680ce400 R08: 0000000000000000 R09: 0000000000000000
[ 81.790681] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
[ 81.798695] R13: 00007efe2abc1160 R14: 0000000000000000 R15: 00007efe2aee6390
[ 81.806709] </TASK>
[ 81.809166] Modules linked in:
[ 81.812599] CR2: 0000000e00001039
[ 81.816325] ---[ end trace 0000000000000000 ]---
[ 81.821513] RIP: 0010:__netif_set_xps_queue+0x6e/0xb10
[ 81.827287] Code: 89 f3 85 f6 0f 88 77 03 00 00 41 0f b7 c7 48 8d 04 80 48
c1 e0 06 48 03 42 18 48 8b 40 70 48 85 c0 0f 84 ff 02 00 00 45 31 d2 <66> 83 78
36 00 48 89 44 24 28 0f 85 ec 02 00 00 48 c7 c7 60 ba 48
[ 81.848368] RSP: 0018:ff70e7fbedc0b7e8 EFLAGS: 00010246
[ 81.854237] RAX: 0000000e00001003 RBX: 0000000000000001 RCX: 0000000000000000
[ 81.862251] RDX: ff25cc4a83409000 RSI: 0000000000000001 RDI: 000000000000000d
[ 81.870264] RBP: ff70e7fbedc0b928 R08: ff25cc4a809a6490 R09: ff25cc4a832fa480
[ 81.878277] R10: 0000000000000000 R11: ff25cc4a81beb0c8 R12: ff70e7fbedc0b8b8
[ 81.886290] R13: ff25cc4a98c13828 R14: 0000000000000000 R15: 000000000000000d
[ 81.894302] FS: 00007efe2b50af00(0000) GS:ff25cc6225af0000(0000)
knlGS:0000000000000000
[ 81.903388] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 81.909841] CR2: 0000000e00001039 CR3: 000000014927c006 CR4: 0000000000771
