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AP resets due to out of nodes

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Information

 
TitleAP resets due to out of nodes
Symptoms
AP crashes when there is a high user count on an AP

Crash log shows:
 
LR [d2e7b840] ol_if_mgmt_drain+0xee8/0x10b4 [qca_ol]
Call Trace:
[cbfd7960] [d2e7b840] ol_if_mgmt_drain+0xee8/0x10b4 [qca_ol] (unreliable)
[cbfd79b0] [d2c2a04c] ieee80211_alloc_node+0x54/0x880 [umac]
[cbfd7a10] [d2c2be7c] ieee80211_dup_bss+0x28/0x130 [umac]
[cbfd7a30] [d2c5dc50] mlme_recv_auth_ap+0x274/0x7a4 [umac]
[cbfd7a80] [d2c50810] ieee80211_recv_mgmt+0xe68/0x118c [umac]
[cbfd7ba0] [d2c94178] ieee80211_input+0x2ac/0x16e4 [umac]
[cbfd7c20] [d2c95734] ieee80211_input_all+0x184/0x430 [umac]
[cbfd7cc0] [d2e8a17c] chk_vht_groupid_action_frame+0x4fc/0x69c [qca_ol]
[cbfd7da0] [d2e9b190] __wmi_control_rx+0x200/0x3a4 [qca_ol]
[cbfd7de0] [d2e6dbd0] ol_ath_handle_wmi_message+0x18/0x164 [qca_ol]
[cbfd7df0] [d2e99bc0] wmi_control_rx+0xcc/0x390 [qca_ol]
[cbfd7e20] [d2eae3bc] ieee80211_ioctl_get_htc_stats+0xdc/0x110 [qca_ol]
[cbfd7e40] [d2eae9cc] htc_rx_completion_handler+0x3e4/0x720 [qca_ol]
[cbfd7e90] [d2eb2f9c] hif_pci_ce_recv_data+0xb0/0x360 [qca_ol]
[cbfd7ed0] [d2eb20d4] ce_per_engine_service+0x154/0x4f8 [qca_ol]
[cbfd7f50] [d2eb61f0] hif_diag_write_access+0x118/0x2b4 [qca_ol]
[cbfd7f70] [c003570c] tasklet_action+0xb8/0x18c
[cbfd7fa0] [c0035df4] __do_softirq+0xe0/0x168
[cbfd7ff0] [c00106a0] call_do_softirq+0x14/0x24
[cb843e90] [c00048cc] do_softirq+0x94/0xa0
[cb843eb0] [c0004628] do_IRQ+0xf8/0x194
[cb843ee0] [c0011394] ret_from_except+0x0/0x18
--- Exception: 501 at cpu_idle+0x9c/0xd8
    LR = cpu_idle+0x9c/0xd8
[cb843fa0] [c000923c] cpu_idle+0xc8/0xd8 (unreliable)
[cb843fc0] [c026241c] start_secondary+0x2cc/0x2e4
[cb843ff0] [c0001d00] __secondary_start+0x30/0x84
Instruction dump:
7fe00106 80010014 83e1000c 38210010 7c0803a6 4e800020 8084000c 4bffff50 
81240000 712ac000 7d200026 55291ffe <0f090000> 7c832378 4bfe4d38 9421ffd0
136 clients attached to the AP
krn: ieee80211_config.c:96-ieee80211_dump_nodes()-Counts: list=136 hash=136 wds=0


 
Environment
  • ExtremeWireless
  • Firmware 10.41.02
  • AP3825
  • High node count
Cause
Resolution
Upgrade to firmware 10.41.05 or higher 
Additional notes
Release Notes: wns0020024 - Enhanced logic for AP39xx where having a larger number of clients associated could impact AP service.

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