If the config directory in sysfs does not exist at all, we are dealing
with a system that does not support THPs. Simply use 1 MiB block size
then, instead of warning "Could not detect THP size, falling back to
..." and falling back to the default THP size.
Cc: "Michael S. Tsirkin" <m...@redhat.com>
Cc: Gavin Shan <gs...@redhat.com>
Cc: Juraj Marcin <jmar...@redhat.com>
Signed-off-by: David Hildenbrand <da...@redhat.com>
---
hw/virtio/virtio-mem.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c
index ef64bf1b4a..4075f3d4ce 100644
--- a/hw/virtio/virtio-mem.c
+++ b/hw/virtio/virtio-mem.c
@@ -88,6 +88,7 @@ static uint32_t virtio_mem_default_thp_size(void)
static uint32_t thp_size;
#define HPAGE_PMD_SIZE_PATH
"/sys/kernel/mm/transparent_hugepage/hpage_pmd_size"
+#define HPAGE_PATH "/sys/kernel/mm/transparent_hugepage/"
static uint32_t virtio_mem_thp_size(void)
{
gchar *content = NULL;
@@ -98,6 +99,12 @@ static uint32_t virtio_mem_thp_size(void)
return thp_size;
}
+ /* No THP -> no restrictions. */
+ if (!g_file_test(HPAGE_PATH, G_FILE_TEST_EXISTS)) {
+ thp_size = VIRTIO_MEM_MIN_BLOCK_SIZE;
+ return thp_size;
+ }
+
/*
* Try to probe the actual THP size, fallback to (sane but eventually
* incorrect) default sizes.
--
2.46.0
