migration: Properly wait on G_IO_IN when peeking messages

migration_channel_read_peek() used to do explicit waits of a short period
when peeking message needs retry.  Replace it with explicit polls on the io
channel, exactly like what qemu_fill_buffer() does.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Link: https://lore.kernel.org/r/20251022192612.2737648-3-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>

diff --git a/migration/channel.c b/migration/channel.c
index a547b1fbfebeee9ba8289ee80ce7a82585ae01b5..462cc183e109b32ebd44a50b090b8ab4d43d346b 100644 (file)
--- a/migration/channel.c
+++ b/migration/channel.c
@@ -135,12 +135,7 @@ int migration_channel_read_peek(QIOChannel *ioc,
             break;
         }
 
-        /* 1ms sleep. */
-        if (qemu_in_coroutine()) {
-            qemu_co_sleep_ns(QEMU_CLOCK_REALTIME, 1000000);
-        } else {
-            g_usleep(1000);
-        }
+        qio_channel_wait_cond(ioc, G_IO_IN);
     }
 
     return 0;