From: Vishal Annapurve <vannapurve@google.com>
To: x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Cc: pbonzini@redhat.com, vkuznets@redhat.com, wanpengli@tencent.com,
jmattson@google.com, joro@8bytes.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
hpa@zytor.com, shuah@kernel.org, yang.zhong@intel.com,
ricarkol@google.com, aaronlewis@google.com, wei.w.wang@intel.com,
kirill.shutemov@linux.intel.com, corbet@lwn.net,
hughd@google.com, jlayton@kernel.org, bfields@fieldses.org,
akpm@linux-foundation.org, chao.p.peng@linux.intel.com,
yu.c.zhang@linux.intel.com, jun.nakajima@intel.com,
dave.hansen@intel.com, michael.roth@amd.com, qperret@google.com,
steven.price@arm.com, ak@linux.intel.com, david@redhat.com,
luto@kernel.org, vbabka@suse.cz, marcorr@google.com,
erdemaktas@google.com, pgonda@google.com, nikunj@amd.com,
seanjc@google.com, diviness@google.com, maz@kernel.org,
dmatlack@google.com, axelrasmussen@google.com,
maciej.szmigiero@oracle.com, mizhang@google.com,
bgardon@google.com, ackerleytng@google.com,
Vishal Annapurve <vannapurve@google.com>
Subject: [V1 PATCH 5/6] KVM: selftests: Add get_free_huge_2m_pages
Date: Fri, 11 Nov 2022 01:42:43 +0000 [thread overview]
Message-ID: <20221111014244.1714148-6-vannapurve@google.com> (raw)
In-Reply-To: <20221111014244.1714148-1-vannapurve@google.com>
Add an API to query free 2MB hugepages in the system.
Signed-off-by: Vishal Annapurve <vannapurve@google.com>
---
.../testing/selftests/kvm/include/test_util.h | 1 +
tools/testing/selftests/kvm/lib/test_util.c | 18 ++++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h
index 140a61f68fe5..f4df49c8b5ba 100644
--- a/tools/testing/selftests/kvm/include/test_util.h
+++ b/tools/testing/selftests/kvm/include/test_util.h
@@ -115,6 +115,7 @@ struct vm_mem_backing_src_alias {
bool thp_configured(void);
size_t get_trans_hugepagesz(void);
size_t get_def_hugetlb_pagesz(void);
+size_t get_free_huge_2mb_pages(void);
const struct vm_mem_backing_src_alias *vm_mem_backing_src_alias(uint32_t i);
size_t get_backing_src_pagesz(uint32_t i);
bool is_backing_src_hugetlb(uint32_t i);
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
index ebbac8246016..4f28ae73f150 100644
--- a/tools/testing/selftests/kvm/lib/test_util.c
+++ b/tools/testing/selftests/kvm/lib/test_util.c
@@ -145,6 +145,24 @@ size_t get_trans_hugepagesz(void)
return size;
}
+size_t get_free_huge_2mb_pages(void)
+{
+ size_t free_pages;
+ FILE *f;
+ int ret;
+
+ f = fopen("/sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages", "r");
+ TEST_ASSERT(f != NULL, "Error in opening hugepages-2048kB/free_hugepages");
+
+ do {
+ ret = fscanf(f, "%ld", &free_pages);
+ } while (errno == EINTR);
+ TEST_ASSERT(ret < 1, "Error reading hugepages-2048kB/free_hugepages");
+ fclose(f);
+
+ return free_pages;
+}
+
size_t get_def_hugetlb_pagesz(void)
{
char buf[64];
--
2.38.1.431.g37b22c650d-goog
next prev parent reply other threads:[~2022-11-11 1:43 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-11 1:42 [V1 PATCH 0/6] selftests: KVM: selftests for fd-based private memory Vishal Annapurve
2022-11-11 1:42 ` [V1 PATCH 1/6] KVM: x86: Add support for testing " Vishal Annapurve
2022-11-22 10:07 ` Chao Peng
2022-11-22 20:06 ` Sean Christopherson
2022-11-24 1:49 ` Marc Orr
2022-11-28 16:21 ` Sean Christopherson
2022-11-24 13:17 ` Chao Peng
2022-12-02 0:26 ` Michael Roth
2022-11-11 1:42 ` [V1 PATCH 2/6] KVM: Selftests: Add support for " Vishal Annapurve
2022-11-11 1:42 ` [V1 PATCH 3/6] KVM: selftests: x86: Add IS_ALIGNED/IS_PAGE_ALIGNED helpers Vishal Annapurve
2022-11-11 1:42 ` [V1 PATCH 4/6] KVM: selftests: x86: Execute VMs with private memory Vishal Annapurve
2022-11-14 19:37 ` Peter Gonda
2022-11-15 1:53 ` Vishal Annapurve
2022-12-08 21:56 ` Vishal Annapurve
2022-11-11 1:42 ` Vishal Annapurve [this message]
2022-11-11 1:42 ` [V1 PATCH 6/6] KVM: selftests: x86: Add selftest for " Vishal Annapurve
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