[PATCH] colo: Don't dump colo cache if dump-guest-core=off

From: Lukas Straub <lukasstraub2@web.de>
To: qemu-devel <qemu-devel@nongnu.org>
Cc: zhang.zhanghailiang@huawei.com,
	"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
	"Rao, Lei" <lei.rao@intel.com>,
	Juan Quintela <quintela@redhat.com>
Subject: [PATCH] colo: Don't dump colo cache if dump-guest-core=off
Date: Sun, 4 Jul 2021 18:14:44 +0200	[thread overview]
Message-ID: <20210704181444.59396f6b@gecko.fritz.box> (raw)

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One might set dump-guest-core=off to make coredumps smaller and
still allow to debug many qemu bugs. Extend this option to the colo
cache.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
---
 migration/ram.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/migration/ram.c b/migration/ram.c
index 723af67c2e..0797d0d222 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -56,6 +56,8 @@
 #include "multifd.h"
 #include "sysemu/runstate.h"
 
+#include "hw/boards.h" /* for machine_dump_guest_core() */
+
 #if defined(__linux__)
 #include "qemu/userfaultfd.h"
 #endif /* defined(__linux__) */
@@ -3356,6 +3358,10 @@ int colo_init_ram_cache(void)
                 }
                 return -errno;
             }
+            if (!machine_dump_guest_core(current_machine)) {
+                qemu_madvise(block->colo_cache, block->used_length,
+                             QEMU_MADV_DONTDUMP);
+            }
         }
     }
 
-- 
2.20.1

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