From: Chen Hanxiao <chenhanxiao(a)gmail.com&gt; We had 'size' limits for virDomainMemoryPeek and virDomainBlockPeek by macro REMOTE_DOMAIN_BLOCK_PEEK_BUFFER_MAX and REMOTE_DOMAIN_MEMORY_PEEK_BUFFER_MAX. The descriptions of the two functions only emphasized RPC buffer size. Signed-off-by: Chen Hanxiao <chenhanxiao(a)gmail.com&gt; --- src/libvirt-domain.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c index ca5a153..646ce72 100644 --- a/src/libvirt-domain.c +++ b/src/libvirt-domain.c @@ -5802,6 +5802,9 @@ virDomainMemoryStats(virDomainPtr dom, virDomainMemoryStatPtr stats, * within the device or file. 'size' may be 0 to test if the * call would succeed. * + * 'size' should be <= 1048576(1M). Since v1.0.5, 'size' had been + * raised up to 4194304(4M). + * * 'buffer' is the return buffer and must be at least 'size' bytes. * * NB. The remote driver imposes a 64K byte limit on 'size'. @@ -5941,6 +5944,9 @@ virDomainBlockResize(virDomainPtr dom, * 'buffer' is the return buffer and must be at least 'size' bytes. * 'size' may be 0 to test if the call would succeed. * + * 'size' should be <= 1048576(1M). Since v1.0.5, 'size' had been + * raised up to 4194304(4M). + * * NB. The remote driver imposes a 64K byte limit on 'size'. * For your program to be able to work reliably over a remote * connection you should split large requests to <= 65536 bytes. -- 2.7.5