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From: Andrew Jones <drjones@redhat.com>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Cc: pbonzini@redhat.com, maz@kernel.org, Dave.Martin@arm.com,
	peter.maydell@linaro.org, eric.auger@redhat.com
Subject: [PATCH 1/4] KVM: selftests: Don't require THP to run tests
Date: Thu, 29 Oct 2020 21:17:00 +0100	[thread overview]
Message-ID: <20201029201703.102716-2-drjones@redhat.com> (raw)
In-Reply-To: <20201029201703.102716-1-drjones@redhat.com>

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>
---
 tools/testing/selftests/kvm/lib/kvm_util.c | 23 +++++++++++++++-------
 1 file 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();
-- 
2.27.0


WARNING: multiple messages have this Message-ID (diff)
From: Andrew Jones <drjones@redhat.com>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Cc: pbonzini@redhat.com, Dave.Martin@arm.com, maz@kernel.org
Subject: [PATCH 1/4] KVM: selftests: Don't require THP to run tests
Date: Thu, 29 Oct 2020 21:17:00 +0100	[thread overview]
Message-ID: <20201029201703.102716-2-drjones@redhat.com> (raw)
In-Reply-To: <20201029201703.102716-1-drjones@redhat.com>

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>
---
 tools/testing/selftests/kvm/lib/kvm_util.c | 23 +++++++++++++++-------
 1 file 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();
-- 
2.27.0

_______________________________________________
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kvmarm@lists.cs.columbia.edu
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  reply	other threads:[~2020-10-29 20:17 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-29 20:16 [PATCH 0/4] KVM: selftests: Add get-reg-list regression test Andrew Jones
2020-10-29 20:16 ` Andrew Jones
2020-10-29 20:17 ` Andrew Jones [this message]
2020-10-29 20:17   ` [PATCH 1/4] KVM: selftests: Don't require THP to run tests Andrew Jones
2020-10-29 20:17 ` [PATCH 2/4] KVM: selftests: Add aarch64 get-reg-list test Andrew Jones
2020-10-29 20:17   ` Andrew Jones
2020-10-29 20:17 ` [PATCH 3/4] KVM: selftests: Update aarch64 get-reg-list blessed list Andrew Jones
2020-10-29 20:17   ` Andrew Jones
2020-10-31 18:53   ` Marc Zyngier
2020-10-31 18:53     ` Marc Zyngier
2020-11-02  8:38     ` Andrew Jones
2020-11-02  8:38       ` Andrew Jones
2020-10-29 20:17 ` [PATCH 4/4] KVM: selftests: Add blessed SVE registers to get-reg-list Andrew Jones
2020-10-29 20:17   ` Andrew Jones
2020-10-29 20:24 ` [PATCH 0/4] KVM: selftests: Add get-reg-list regression test Auger Eric
2020-10-29 20:24   ` Auger Eric
2020-11-09  9:14 ` Andrew Jones
2020-11-09  9:14   ` Andrew Jones

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