From f4d5082f6946e4afb4326d1d37f413fed16bf7e2 Mon Sep 17 00:00:00 2001
Message-Id: <f4d5082f6946e4afb4326d1d37f413fed16bf7e2@dist-git>
From: Nir Soffer <nirsof@gmail.com>
Date: Mon, 2 Oct 2017 09:59:00 +0200
Subject: [PATCH] Release the GIL during virDomainGetMemoryStats &
 virDomainGetDiskErrors

We discovered that the entire python process get stuck for about 30
seconds when calling virDomain.getMemoryStats() if libvirt is stuck in
virConnect.getAllDomainStats() on inaccessible storage. This blocking
cause a horrible mess in oVirt.

This patches adds the standard *_ALLOW_THREADS around the call to avoid
this unwanted blocking.

Signed-off-by: Nir Soffer <nirsof@gmail.com>
(cherry picked from commit 7af7450b0ac6bd69181f3c8d2360f4f97478191c)

Conflicts:
        libvirt-override.c

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1497197

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 libvirt-override.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libvirt-override.c b/libvirt-override.c
index 93c7ef0..dc81274 100644
--- a/libvirt-override.c
+++ b/libvirt-override.c
@@ -363,8 +363,11 @@ libvirt_virDomainMemoryStats(PyObject *self ATTRIBUTE_UNUSED,
         return NULL;
     domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
 
+    LIBVIRT_BEGIN_ALLOW_THREADS;
     nr_stats = virDomainMemoryStats(domain, stats,
                                     VIR_DOMAIN_MEMORY_STAT_NR, 0);
+    LIBVIRT_END_ALLOW_THREADS;
+
     if (nr_stats == -1)
         return VIR_PY_NONE;
 
@@ -4864,7 +4867,11 @@ libvirt_virDomainGetDiskErrors(PyObject *self ATTRIBUTE_UNUSED,
 
     domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
 
-    if ((count = virDomainGetDiskErrors(domain, NULL, 0, 0)) < 0)
+    LIBVIRT_BEGIN_ALLOW_THREADS;
+    count = virDomainGetDiskErrors(domain, NULL, 0, 0);
+    LIBVIRT_END_ALLOW_THREADS;
+
+    if (count < 0)
         return VIR_PY_NONE;
     ndisks = count;
 
-- 
2.14.2