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| author | Andrew Jones <drjones@redhat.com> | 2020-10-29 21:17:00 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-31 10:35:50 -0400 |
| commit | 0f55b67e5ad8dcdfb9ae2aaed75dd9fbb2bd92b2 (patch) | |
| tree | f6e77496a39c3b7132f5bd6a0ecc5ff4545762c4 | |
| parent | 064eedf2c50f692088e1418c553084bf9c1432f8 (diff) | |
| download | linux-0f55b67e5ad8dcdfb9ae2aaed75dd9fbb2bd92b2.tar.bz2 | |
KVM: selftests: Don't require THP to run tests
Unless we want to test with THP, then we shouldn't require it to be
configured by the host kernel. Unfortunately, even advising with
MADV_NOHUGEPAGE does require it, so check for THP first in order
to avoid madvise failing with EINVAL.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Message-Id: <20201029201703.102716-2-drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | tools/testing/selftests/kvm/lib/kvm_util.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 74776ee228f2..3327cebc1095 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -14,6 +14,7 @@ #include <sys/mman.h> #include <sys/types.h> #include <sys/stat.h> +#include <unistd.h> #include <linux/kernel.h> #define KVM_UTIL_PGS_PER_HUGEPG 512 @@ -664,13 +665,21 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm, /* As needed perform madvise */ if (src_type == VM_MEM_SRC_ANONYMOUS || src_type == VM_MEM_SRC_ANONYMOUS_THP) { - ret = madvise(region->host_mem, npages * vm->page_size, - src_type == VM_MEM_SRC_ANONYMOUS ? MADV_NOHUGEPAGE : MADV_HUGEPAGE); - TEST_ASSERT(ret == 0, "madvise failed,\n" - " addr: %p\n" - " length: 0x%lx\n" - " src_type: %x", - region->host_mem, npages * vm->page_size, src_type); + struct stat statbuf; + + ret = stat("/sys/kernel/mm/transparent_hugepage", &statbuf); + TEST_ASSERT(ret == 0 || (ret == -1 && errno == ENOENT), + "stat /sys/kernel/mm/transparent_hugepage"); + + TEST_ASSERT(ret == 0 || src_type != VM_MEM_SRC_ANONYMOUS_THP, + "VM_MEM_SRC_ANONYMOUS_THP requires THP to be configured in the host kernel"); + + if (ret == 0) { + ret = madvise(region->host_mem, npages * vm->page_size, + src_type == VM_MEM_SRC_ANONYMOUS ? MADV_NOHUGEPAGE : MADV_HUGEPAGE); + TEST_ASSERT(ret == 0, "madvise failed, addr: %p length: 0x%lx src_type: %x", + region->host_mem, npages * vm->page_size, src_type); + } } region->unused_phy_pages = sparsebit_alloc(); |