F5 | 1088429

The Linux kernel unreclaimable slab leaks kmalloc-64 (64 byte) allocations due to an issue with ext4 filesystem code. ... The kmalloc-64 leaks occur when specific operations are executed on ext4 filesystems, such as copy of file with extended attribute preservation. ... Red Hat have documented the issue, refer to the links below. ... Note: Red Hat account with appropriate access are required to view these pages. ... Kernel unreclaimable slab memory grows over time. ... This will be growth of what F5 term host memory, and will appear as increased other and/or swap memory on memory graphs. ... Usually the amount leaked is quite small and has no impact. ... If large enough this may leave system with too little host memory and trigger typical out of memory symptoms such as: - sluggish management by TMUI (GUI) and CLI shell - possible invocation of oom-killer by kernel leading to termination of a process - if severe, the system may thrash and become unstable, leading to cores and possibl...