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ffdd260aa7
libvirt/SOURCES/libvirt-vircgroup-extract-virCgroupV1-Set-Get-Memory-Limit.patch
CentOS Sources ffdd260aa7 import libvirt-4.5.0-42.module+el8.2.0+6024+15a2423f
2021-09-10 11:57:18 +00:00

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From 5101d214a63b31847f80048d4ee34b5e62176ddd Mon Sep 17 00:00:00 2001
Message-Id: <5101d214a63b31847f80048d4ee34b5e62176ddd@dist-git>
From: Pavel Hrdina <phrdina@redhat.com>
Date: Mon, 1 Jul 2019 17:06:52 +0200
Subject: [PATCH] vircgroup: extract virCgroupV1(Set|Get)Memory*Limit
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
They all need virCgroupV1GetMemoryUnlimitedKB() so it's easier to
move them in one commit.
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
(cherry picked from commit 900c58b7f963d5054921e31bbd0b6005155b284a)
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1689297
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Message-Id: <c85e4973bb1718a5c9a36f971f9544b46b213183.1561993100.git.phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---
src/util/vircgroup.c | 128 ++-------------------------
src/util/vircgroupbackend.h | 30 +++++++
src/util/vircgrouppriv.h | 6 ++
src/util/vircgroupv1.c | 168 ++++++++++++++++++++++++++++++++++++
4 files changed, 211 insertions(+), 121 deletions(-)
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index ed7252243c..6708eef0da 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -634,7 +634,7 @@ virCgroupMakeGroup(virCgroupPtr parent,
*
* Returns 0 on success, -1 on error
*/
-static int
+int
virCgroupNew(pid_t pid,
const char *path,
virCgroupPtr parent,
@@ -1537,51 +1537,6 @@ virCgroupGetBlkioDeviceWeight(virCgroupPtr group,
}
-/*
- * Retrieve the "memory.limit_in_bytes" value from the memory controller
- * root dir. This value cannot be modified by userspace and therefore
- * is the maximum limit value supported by cgroups on the local system.
- * Returns this value scaled to KB or falls back to the original
- * VIR_DOMAIN_MEMORY_PARAM_UNLIMITED. Either way, remember the return
- * value to avoid unnecessary cgroup filesystem access.
- */
-static unsigned long long int virCgroupMemoryUnlimitedKB;
-static virOnceControl virCgroupMemoryOnce = VIR_ONCE_CONTROL_INITIALIZER;
-
-static void
-virCgroupMemoryOnceInit(void)
-{
- virCgroupPtr group;
- unsigned long long int mem_unlimited = 0ULL;
-
- if (virCgroupNew(-1, "/", NULL, -1, &group) < 0)
- goto cleanup;
-
- if (!virCgroupHasController(group, VIR_CGROUP_CONTROLLER_MEMORY))
- goto cleanup;
-
- ignore_value(virCgroupGetValueU64(group,
- VIR_CGROUP_CONTROLLER_MEMORY,
- "memory.limit_in_bytes",
- &mem_unlimited));
- cleanup:
- virCgroupFree(&group);
- virCgroupMemoryUnlimitedKB = mem_unlimited >> 10;
-}
-
-static unsigned long long int
-virCgroupGetMemoryUnlimitedKB(void)
-{
- if (virOnce(&virCgroupMemoryOnce, virCgroupMemoryOnceInit) < 0)
- VIR_DEBUG("Init failed, will fall back to defaults.");
-
- if (virCgroupMemoryUnlimitedKB)
- return virCgroupMemoryUnlimitedKB;
- else
- return VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
-}
-
-
/**
* virCgroupSetMemory:
*
@@ -1652,7 +1607,7 @@ virCgroupGetMemoryUsage(virCgroupPtr group, unsigned long *kb)
int
virCgroupSetMemoryHardLimit(virCgroupPtr group, unsigned long long kb)
{
- return virCgroupSetMemory(group, kb);
+ VIR_CGROUP_BACKEND_CALL(group, setMemoryHardLimit, -1, kb);
}
@@ -1667,18 +1622,7 @@ virCgroupSetMemoryHardLimit(virCgroupPtr group, unsigned long long kb)
int
virCgroupGetMemoryHardLimit(virCgroupPtr group, unsigned long long *kb)
{
- long long unsigned int limit_in_bytes;
-
- if (virCgroupGetValueU64(group,
- VIR_CGROUP_CONTROLLER_MEMORY,
- "memory.limit_in_bytes", &limit_in_bytes) < 0)
- return -1;
-
- *kb = limit_in_bytes >> 10;
- if (*kb >= virCgroupGetMemoryUnlimitedKB())
- *kb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
-
- return 0;
+ VIR_CGROUP_BACKEND_CALL(group, getMemoryHardLimit, -1, kb);
}
@@ -1693,25 +1637,7 @@ virCgroupGetMemoryHardLimit(virCgroupPtr group, unsigned long long *kb)
int
virCgroupSetMemorySoftLimit(virCgroupPtr group, unsigned long long kb)
{
- unsigned long long maxkb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
-
- if (kb > maxkb) {
- virReportError(VIR_ERR_INVALID_ARG,
- _("Memory '%llu' must be less than %llu"),
- kb, maxkb);
- return -1;
- }
-
- if (kb == maxkb)
- return virCgroupSetValueI64(group,
- VIR_CGROUP_CONTROLLER_MEMORY,
- "memory.soft_limit_in_bytes",
- -1);
- else
- return virCgroupSetValueU64(group,
- VIR_CGROUP_CONTROLLER_MEMORY,
- "memory.soft_limit_in_bytes",
- kb << 10);
+ VIR_CGROUP_BACKEND_CALL(group, setMemorySoftLimit, -1, kb);
}
@@ -1726,18 +1652,7 @@ virCgroupSetMemorySoftLimit(virCgroupPtr group, unsigned long long kb)
int
virCgroupGetMemorySoftLimit(virCgroupPtr group, unsigned long long *kb)
{
- long long unsigned int limit_in_bytes;
-
- if (virCgroupGetValueU64(group,
- VIR_CGROUP_CONTROLLER_MEMORY,
- "memory.soft_limit_in_bytes", &limit_in_bytes) < 0)
- return -1;
-
- *kb = limit_in_bytes >> 10;
- if (*kb >= virCgroupGetMemoryUnlimitedKB())
- *kb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
-
- return 0;
+ VIR_CGROUP_BACKEND_CALL(group, getMemorySoftLimit, -1, kb);
}
@@ -1752,25 +1667,7 @@ virCgroupGetMemorySoftLimit(virCgroupPtr group, unsigned long long *kb)
int
virCgroupSetMemSwapHardLimit(virCgroupPtr group, unsigned long long kb)
{
- unsigned long long maxkb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
-
- if (kb > maxkb) {
- virReportError(VIR_ERR_INVALID_ARG,
- _("Memory '%llu' must be less than %llu"),
- kb, maxkb);
- return -1;
- }
-
- if (kb == maxkb)
- return virCgroupSetValueI64(group,
- VIR_CGROUP_CONTROLLER_MEMORY,
- "memory.memsw.limit_in_bytes",
- -1);
- else
- return virCgroupSetValueU64(group,
- VIR_CGROUP_CONTROLLER_MEMORY,
- "memory.memsw.limit_in_bytes",
- kb << 10);
+ VIR_CGROUP_BACKEND_CALL(group, setMemSwapHardLimit, -1, kb);
}
@@ -1785,18 +1682,7 @@ virCgroupSetMemSwapHardLimit(virCgroupPtr group, unsigned long long kb)
int
virCgroupGetMemSwapHardLimit(virCgroupPtr group, unsigned long long *kb)
{
- long long unsigned int limit_in_bytes;
-
- if (virCgroupGetValueU64(group,
- VIR_CGROUP_CONTROLLER_MEMORY,
- "memory.memsw.limit_in_bytes", &limit_in_bytes) < 0)
- return -1;
-
- *kb = limit_in_bytes >> 10;
- if (*kb >= virCgroupGetMemoryUnlimitedKB())
- *kb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
-
- return 0;
+ VIR_CGROUP_BACKEND_CALL(group, getMemSwapHardLimit, -1, kb);
}
diff --git a/src/util/vircgroupbackend.h b/src/util/vircgroupbackend.h
index 8bdfc5c835..cdbca4b907 100644
--- a/src/util/vircgroupbackend.h
+++ b/src/util/vircgroupbackend.h
@@ -227,6 +227,30 @@ typedef int
(*virCgroupGetMemoryUsageCB)(virCgroupPtr group,
unsigned long *kb);
+typedef int
+(*virCgroupSetMemoryHardLimitCB)(virCgroupPtr group,
+ unsigned long long kb);
+
+typedef int
+(*virCgroupGetMemoryHardLimitCB)(virCgroupPtr group,
+ unsigned long long *kb);
+
+typedef int
+(*virCgroupSetMemorySoftLimitCB)(virCgroupPtr group,
+ unsigned long long kb);
+
+typedef int
+(*virCgroupGetMemorySoftLimitCB)(virCgroupPtr group,
+ unsigned long long *kb);
+
+typedef int
+(*virCgroupSetMemSwapHardLimitCB)(virCgroupPtr group,
+ unsigned long long kb);
+
+typedef int
+(*virCgroupGetMemSwapHardLimitCB)(virCgroupPtr group,
+ unsigned long long *kb);
+
struct _virCgroupBackend {
virCgroupBackendType type;
@@ -269,6 +293,12 @@ struct _virCgroupBackend {
virCgroupSetMemoryCB setMemory;
virCgroupGetMemoryStatCB getMemoryStat;
virCgroupGetMemoryUsageCB getMemoryUsage;
+ virCgroupSetMemoryHardLimitCB setMemoryHardLimit;
+ virCgroupGetMemoryHardLimitCB getMemoryHardLimit;
+ virCgroupSetMemorySoftLimitCB setMemorySoftLimit;
+ virCgroupGetMemorySoftLimitCB getMemorySoftLimit;
+ virCgroupSetMemSwapHardLimitCB setMemSwapHardLimit;
+ virCgroupGetMemSwapHardLimitCB getMemSwapHardLimit;
};
typedef struct _virCgroupBackend virCgroupBackend;
typedef virCgroupBackend *virCgroupBackendPtr;
diff --git a/src/util/vircgrouppriv.h b/src/util/vircgrouppriv.h
index 3a968c1ce2..7b985280e1 100644
--- a/src/util/vircgrouppriv.h
+++ b/src/util/vircgrouppriv.h
@@ -88,6 +88,12 @@ int virCgroupGetValueForBlkDev(virCgroupPtr group,
const char *path,
char **value);
+int virCgroupNew(pid_t pid,
+ const char *path,
+ virCgroupPtr parent,
+ int controllers,
+ virCgroupPtr *group);
+
int virCgroupNewPartition(const char *path,
bool create,
int controllers,
diff --git a/src/util/vircgroupv1.c b/src/util/vircgroupv1.c
index 4f1d79a758..779288fb97 100644
--- a/src/util/vircgroupv1.c
+++ b/src/util/vircgroupv1.c
@@ -1378,6 +1378,51 @@ virCgroupV1GetBlkioDeviceWriteBps(virCgroupPtr group,
}
+/*
+ * Retrieve the "memory.limit_in_bytes" value from the memory controller
+ * root dir. This value cannot be modified by userspace and therefore
+ * is the maximum limit value supported by cgroups on the local system.
+ * Returns this value scaled to KB or falls back to the original
+ * VIR_DOMAIN_MEMORY_PARAM_UNLIMITED. Either way, remember the return
+ * value to avoid unnecessary cgroup filesystem access.
+ */
+static unsigned long long int virCgroupV1MemoryUnlimitedKB;
+static virOnceControl virCgroupV1MemoryOnce = VIR_ONCE_CONTROL_INITIALIZER;
+
+static void
+virCgroupV1MemoryOnceInit(void)
+{
+ virCgroupPtr group;
+ unsigned long long int mem_unlimited = 0ULL;
+
+ if (virCgroupNew(-1, "/", NULL, -1, &group) < 0)
+ goto cleanup;
+
+ if (!virCgroupV1HasController(group, VIR_CGROUP_CONTROLLER_MEMORY))
+ goto cleanup;
+
+ ignore_value(virCgroupGetValueU64(group,
+ VIR_CGROUP_CONTROLLER_MEMORY,
+ "memory.limit_in_bytes",
+ &mem_unlimited));
+ cleanup:
+ virCgroupFree(&group);
+ virCgroupV1MemoryUnlimitedKB = mem_unlimited >> 10;
+}
+
+static unsigned long long int
+virCgroupV1GetMemoryUnlimitedKB(void)
+{
+ if (virOnce(&virCgroupV1MemoryOnce, virCgroupV1MemoryOnceInit) < 0)
+ VIR_DEBUG("Init failed, will fall back to defaults.");
+
+ if (virCgroupV1MemoryUnlimitedKB)
+ return virCgroupV1MemoryUnlimitedKB;
+ else
+ return VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
+}
+
+
static int
virCgroupV1SetMemory(virCgroupPtr group,
unsigned long long kb)
@@ -1494,6 +1539,123 @@ virCgroupV1GetMemoryUsage(virCgroupPtr group,
}
+static int
+virCgroupV1SetMemoryHardLimit(virCgroupPtr group,
+ unsigned long long kb)
+{
+ return virCgroupV1SetMemory(group, kb);
+}
+
+
+static int
+virCgroupV1GetMemoryHardLimit(virCgroupPtr group,
+ unsigned long long *kb)
+{
+ long long unsigned int limit_in_bytes;
+
+ if (virCgroupGetValueU64(group,
+ VIR_CGROUP_CONTROLLER_MEMORY,
+ "memory.limit_in_bytes", &limit_in_bytes) < 0)
+ return -1;
+
+ *kb = limit_in_bytes >> 10;
+ if (*kb >= virCgroupV1GetMemoryUnlimitedKB())
+ *kb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
+
+ return 0;
+}
+
+
+static int
+virCgroupV1SetMemorySoftLimit(virCgroupPtr group,
+ unsigned long long kb)
+{
+ unsigned long long maxkb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
+
+ if (kb > maxkb) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("Memory '%llu' must be less than %llu"),
+ kb, maxkb);
+ return -1;
+ }
+
+ if (kb == maxkb)
+ return virCgroupSetValueI64(group,
+ VIR_CGROUP_CONTROLLER_MEMORY,
+ "memory.soft_limit_in_bytes",
+ -1);
+ else
+ return virCgroupSetValueU64(group,
+ VIR_CGROUP_CONTROLLER_MEMORY,
+ "memory.soft_limit_in_bytes",
+ kb << 10);
+}
+
+
+static int
+virCgroupV1GetMemorySoftLimit(virCgroupPtr group,
+ unsigned long long *kb)
+{
+ long long unsigned int limit_in_bytes;
+
+ if (virCgroupGetValueU64(group,
+ VIR_CGROUP_CONTROLLER_MEMORY,
+ "memory.soft_limit_in_bytes", &limit_in_bytes) < 0)
+ return -1;
+
+ *kb = limit_in_bytes >> 10;
+ if (*kb >= virCgroupV1GetMemoryUnlimitedKB())
+ *kb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
+
+ return 0;
+}
+
+
+static int
+virCgroupV1SetMemSwapHardLimit(virCgroupPtr group,
+ unsigned long long kb)
+{
+ unsigned long long maxkb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
+
+ if (kb > maxkb) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("Memory '%llu' must be less than %llu"),
+ kb, maxkb);
+ return -1;
+ }
+
+ if (kb == maxkb)
+ return virCgroupSetValueI64(group,
+ VIR_CGROUP_CONTROLLER_MEMORY,
+ "memory.memsw.limit_in_bytes",
+ -1);
+ else
+ return virCgroupSetValueU64(group,
+ VIR_CGROUP_CONTROLLER_MEMORY,
+ "memory.memsw.limit_in_bytes",
+ kb << 10);
+}
+
+
+static int
+virCgroupV1GetMemSwapHardLimit(virCgroupPtr group,
+ unsigned long long *kb)
+{
+ long long unsigned int limit_in_bytes;
+
+ if (virCgroupGetValueU64(group,
+ VIR_CGROUP_CONTROLLER_MEMORY,
+ "memory.memsw.limit_in_bytes", &limit_in_bytes) < 0)
+ return -1;
+
+ *kb = limit_in_bytes >> 10;
+ if (*kb >= virCgroupV1GetMemoryUnlimitedKB())
+ *kb = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
+
+ return 0;
+}
+
+
virCgroupBackend virCgroupV1Backend = {
.type = VIR_CGROUP_BACKEND_TYPE_V1,
@@ -1534,6 +1696,12 @@ virCgroupBackend virCgroupV1Backend = {
.setMemory = virCgroupV1SetMemory,
.getMemoryStat = virCgroupV1GetMemoryStat,
.getMemoryUsage = virCgroupV1GetMemoryUsage,
+ .setMemoryHardLimit = virCgroupV1SetMemoryHardLimit,
+ .getMemoryHardLimit = virCgroupV1GetMemoryHardLimit,
+ .setMemorySoftLimit = virCgroupV1SetMemorySoftLimit,
+ .getMemorySoftLimit = virCgroupV1GetMemorySoftLimit,
+ .setMemSwapHardLimit = virCgroupV1SetMemSwapHardLimit,
+ .getMemSwapHardLimit = virCgroupV1GetMemSwapHardLimit,
};
--
2.22.0
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