From aeb709c767aeca996e6011133e4f7bdb2a4af652 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Wed, 30 Sep 2026 09:59:20 +0000 Subject: selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first free_bulk() starts RCU tasks trace GP and the rest of the elements are freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and waiting_for_gp_ttrace lists are empty. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- drivers/vfio/pci/trace.h | 98 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 drivers/vfio/pci/trace.h (limited to 'drivers/vfio/pci/trace.h') diff --git a/drivers/vfio/pci/trace.h b/drivers/vfio/pci/trace.h new file mode 100644 index 000000000..b2aa986ab --- /dev/null +++ b/drivers/vfio/pci/trace.h @@ -0,0 +1,98 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * VFIO PCI mmap/mmap_fault tracepoints + * + * Copyright (C) 2018 IBM Corp. All rights reserved. + * Author: Alexey Kardashevskiy + */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM vfio_pci + +#if !defined(_TRACE_VFIO_PCI_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_VFIO_PCI_H + +#include + +TRACE_EVENT(vfio_pci_nvgpu_mmap_fault, + TP_PROTO(struct pci_dev *pdev, unsigned long hpa, unsigned long ua, + vm_fault_t ret), + TP_ARGS(pdev, hpa, ua, ret), + + TP_STRUCT__entry( + __field(const char *, name) + __field(unsigned long, hpa) + __field(unsigned long, ua) + __field(int, ret) + ), + + TP_fast_assign( + __entry->name = dev_name(&pdev->dev), + __entry->hpa = hpa; + __entry->ua = ua; + __entry->ret = ret; + ), + + TP_printk("%s: %lx -> %lx ret=%d", __entry->name, __entry->hpa, + __entry->ua, __entry->ret) +); + +TRACE_EVENT(vfio_pci_nvgpu_mmap, + TP_PROTO(struct pci_dev *pdev, unsigned long hpa, unsigned long ua, + unsigned long size, int ret), + TP_ARGS(pdev, hpa, ua, size, ret), + + TP_STRUCT__entry( + __field(const char *, name) + __field(unsigned long, hpa) + __field(unsigned long, ua) + __field(unsigned long, size) + __field(int, ret) + ), + + TP_fast_assign( + __entry->name = dev_name(&pdev->dev), + __entry->hpa = hpa; + __entry->ua = ua; + __entry->size = size; + __entry->ret = ret; + ), + + TP_printk("%s: %lx -> %lx size=%lx ret=%d", __entry->name, __entry->hpa, + __entry->ua, __entry->size, __entry->ret) +); + +TRACE_EVENT(vfio_pci_npu2_mmap, + TP_PROTO(struct pci_dev *pdev, unsigned long hpa, unsigned long ua, + unsigned long size, int ret), + TP_ARGS(pdev, hpa, ua, size, ret), + + TP_STRUCT__entry( + __field(const char *, name) + __field(unsigned long, hpa) + __field(unsigned long, ua) + __field(unsigned long, size) + __field(int, ret) + ), + + TP_fast_assign( + __entry->name = dev_name(&pdev->dev), + __entry->hpa = hpa; + __entry->ua = ua; + __entry->size = size; + __entry->ret = ret; + ), + + TP_printk("%s: %lx -> %lx size=%lx ret=%d", __entry->name, __entry->hpa, + __entry->ua, __entry->size, __entry->ret) +); + +#endif /* _TRACE_VFIO_PCI_H */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH ../../drivers/vfio/pci +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace + +/* This part must be outside protection */ +#include -- cgit v1.3.1