From 9c55fe94081dd15148428d32e60fd75ec2eb37ec Mon Sep 17 00:00:00 2001 From: Lukas Straub Date: Fri, 22 May 2020 15:53:53 +0800 Subject: net/colo-compare.c: Fix deadlock in compare_chr_send The chr_out chardev is connected to a filter-redirector running in the main loop. qemu_chr_fe_write_all might block here in compare_chr_send if the (socket-)buffer is full. If another filter-redirector in the main loop want's to send data to chr_pri_in it might also block if the buffer is full. This leads to a deadlock because both event loops get blocked. Fix this by converting compare_chr_send to a coroutine and putting the packets in a send queue. Signed-off-by: Lukas Straub Reviewed-by: Zhang Chen Tested-by: Zhang Chen Signed-off-by: Zhang Chen Signed-off-by: Jason Wang --- net/colo.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'net/colo.c') diff --git a/net/colo.c b/net/colo.c index 8196b35837..a6c66d829a 100644 --- a/net/colo.c +++ b/net/colo.c @@ -185,6 +185,13 @@ void packet_destroy(void *opaque, void *user_data) g_slice_free(Packet, pkt); } +void packet_destroy_partial(void *opaque, void *user_data) +{ + Packet *pkt = opaque; + + g_slice_free(Packet, pkt); +} + /* * Clear hashtable, stop this hash growing really huge */ -- cgit 1.4.1