From cd4220d23bf3f43cf720e82bdee681f383433ae2 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Thu, 1 Jul 2021 17:42:24 +0200 Subject: KVM: selftests: do not require 64GB in set_memory_region_test Unless the user sets overcommit_memory or has plenty of swap, the latest changes to the testcase will result in ENOMEM failures for hosts with less than 64GB RAM. As we do not use much of the allocated memory, we can use MAP_NORESERVE to avoid this error. Cc: Zenghui Yu Cc: vkuznets@redhat.com Cc: wanghaibin.wang@huawei.com Cc: stable@vger.kernel.org Fixes: 309505dd5685 ("KVM: selftests: Fix mapping length truncation in m{,un}map()") Tested-by: Zenghui Yu Link: https://lore.kernel.org/kvm/20210701160425.33666-1-borntraeger@de.ibm.com/ Signed-off-by: Christian Borntraeger --- tools/testing/selftests/kvm/set_memory_region_test.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'tools') diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c index d8812f27648c..d31f54ac4e98 100644 --- a/tools/testing/selftests/kvm/set_memory_region_test.c +++ b/tools/testing/selftests/kvm/set_memory_region_test.c @@ -377,7 +377,8 @@ static void test_add_max_memory_regions(void) (max_mem_slots - 1), MEM_REGION_SIZE >> 10); mem = mmap(NULL, (size_t)max_mem_slots * MEM_REGION_SIZE + alignment, - PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0); TEST_ASSERT(mem != MAP_FAILED, "Failed to mmap() host"); mem_aligned = (void *)(((size_t) mem + alignment - 1) & ~(alignment - 1)); -- cgit v1.2.3