https://bugzilla.kernel.org/show_bug.cgi?id=208081 Bug ID: 208081 Summary: Memory leak in kvm_async_pf_task_wake Product: Virtualization Version: unspecified Kernel Version: 5.6.14 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: sites+kernel@xxxx Regression: No I have several KVM virtual servers at a number of hosting providers. On just one of them, the unreclaimable slab memory is growing linearly over time, until it hits a maximum (when the server's memory is 100% allocated). All the memory is allocated in kmalloc-64 slabs. After enabling slab debugging using slub_debug=U, /sys/kernel/slab/kmalloc-64/alloc_calls says that most of the allocations are coming from kvm_async_pf_task_wake This looks very similar to this blog post: https://darkimmortal.com/debian-10-kernel-slab-memory-leak/. Also see my post on ServerFault: https://serverfault.com/questions/1020241/debugging-kmalloc-64-slab-allocations-memory-leak Any suggestions on how to debug this? It seems like it could be a kernel bug. -- You are receiving this mail because: You are watching the assignee of the bug.
