Cisco Bug: CSCua86731 - NXOS kernel memory leak in klm_pss
Jun 15, 2020
- Cisco Nexus 7000 Series Switches
Known Affected Releases
Symptom: Nexus 7k running release 6.1.1 or earlier susceptible to kernel memory leak due to klm_pss allocating large amount of memory Conditions: N7k running release 6.1.1 To calculate the CURRENT kernel memory, use the following procedure: N7K# show system internal kernel memory usage | in Low Low memory condition is logged when the following formula is at/above the logging threshold: (LowTotal - LowFree) ÷ LowTotal x 100 eg: 1604_09hs n7k# sh system internal kernel meminfo LowTotal: 713672 kB LowFree: 66628 kB =90.66% 1604_12hs n7k# sh system internal kernel meminfo LowTotal: 713672 kB LowFree: 66460 kB =90.68% 1604_15hs n7k# sh system internal kernel meminfo LowTotal: 713672 kB LowFree: 66204 kB =90.72% If memory goes so high, check the output of show system internal kernel malloc-stats to see memory getting allocated to klm_pss and compare a number of outputs to confirm the same.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases