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 --- include/vdso/page.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 include/vdso/page.h (limited to 'include/vdso/page.h') diff --git a/include/vdso/page.h b/include/vdso/page.h new file mode 100644 index 000000000..bc47186c0 --- /dev/null +++ b/include/vdso/page.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __VDSO_PAGE_H +#define __VDSO_PAGE_H + +#include + +/* + * PAGE_SHIFT determines the page size. + * + * Note: This definition is required because PAGE_SHIFT is used + * in several places throughout the codebase. + */ +#define PAGE_SHIFT CONFIG_PAGE_SHIFT + +#define PAGE_SIZE (_AC(1,UL) << CONFIG_PAGE_SHIFT) + +#if !defined(CONFIG_64BIT) +/* + * Applies only to 32-bit architectures. + * + * Subtle: (1 << CONFIG_PAGE_SHIFT) is an int, not an unsigned long. + * So if we assign PAGE_MASK to a larger type it gets extended the + * way we want (i.e. with 1s in the high bits) while masking a + * 64-bit value such as phys_addr_t. + */ +#define PAGE_MASK (~((1 << CONFIG_PAGE_SHIFT) - 1)) +#else +#define PAGE_MASK (~(PAGE_SIZE - 1)) +#endif + +#endif /* __VDSO_PAGE_H */ -- cgit v1.3.1