From ba607ca8bff4d2c2062902f8355657c865ac7c29 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Mon, 11 May 2020 19:36:30 +0100 Subject: aio-posix: disable fdmon-io_uring when GSource is used The glib event loop does not call fdmon_io_uring_wait() so fd handlers waiting to be submitted build up in the list. There is no benefit is using io_uring when the glib GSource is being used, so disable it instead of implementing a more complex fix. This fixes a memory leak where AioHandlers would build up and increasing amounts of CPU time were spent iterating them in aio_pending(). The symptom is that guests become slow when QEMU is built with io_uring support. Buglink: https://bugs.launchpad.net/qemu/+bug/1877716 Fixes: 73fd282e7b6dd4e4ea1c3bbb3d302c8db51e4ccf ("aio-posix: add io_uring fd monitoring implementation") Signed-off-by: Stefan Hajnoczi Tested-by: Oleksandr Natalenko Message-id: 20200511183630.279750-3-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi --- include/block/aio.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/block') diff --git a/include/block/aio.h b/include/block/aio.h index 62ed954344..b2f703fa3f 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -701,6 +701,9 @@ void aio_context_setup(AioContext *ctx); */ void aio_context_destroy(AioContext *ctx); +/* Used internally, do not call outside AioContext code */ +void aio_context_use_g_source(AioContext *ctx); + /** * aio_context_set_poll_params: * @ctx: the aio context -- cgit v1.2.3-55-g7522