From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- tools/testing/vma/main.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 tools/testing/vma/main.c (limited to 'tools/testing/vma/main.c') diff --git a/tools/testing/vma/main.c b/tools/testing/vma/main.c new file mode 100644 index 000000000..18338f5d2 --- /dev/null +++ b/tools/testing/vma/main.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "shared.h" +/* + * Directly import the VMA implementation here. Our vma_internal.h wrapper + * provides userland-equivalent functionality for everything vma.c uses. + */ +#include "../../../mm/vma_init.c" +#include "../../../mm/vma_exec.c" +#include "../../../mm/vma.c" + +/* Tests are included directly so they can test static functions in mm/vma.c. */ +#include "tests/merge.c" +#include "tests/mmap.c" +#include "tests/vma.c" + +int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT; + +/* Helper functions which utilise static kernel functions. */ + +struct vm_area_struct *merge_existing(struct vma_merge_struct *vmg) +{ + struct vm_area_struct *vma; + + vma = vma_merge_existing_range(vmg); + if (vma) + vma_assert_attached(vma); + return vma; +} + +int attach_vma(struct mm_struct *mm, struct vm_area_struct *vma) +{ + int res; + + res = vma_link(mm, vma); + if (!res) + vma_assert_attached(vma); + return res; +} + +/* Main test running which invokes tests/ *.c runners. */ +int main(void) +{ + int num_tests = 0, num_fail = 0; + + maple_tree_init(); + vma_state_init(); + + run_merge_tests(&num_tests, &num_fail); + run_mmap_tests(&num_tests, &num_fail); + run_vma_tests(&num_tests, &num_fail); + + printf("%d tests run, %d passed, %d failed.\n", + num_tests, num_tests - num_fail, num_fail); + + return num_fail == 0 ? EXIT_SUCCESS : EXIT_FAILURE; +} -- cgit v1.3.1