From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38819) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eRbiZ-0004G8-0S for qemu-devel@nongnu.org; Wed, 20 Dec 2017 05:35:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eRbiW-0004RY-46 for qemu-devel@nongnu.org; Wed, 20 Dec 2017 05:35:19 -0500 From: Kevin Wolf Date: Wed, 20 Dec 2017 11:33:55 +0100 Message-Id: <20171220103412.13048-3-kwolf@redhat.com> In-Reply-To: <20171220103412.13048-1-kwolf@redhat.com> References: <20171220103412.13048-1-kwolf@redhat.com> Subject: [Qemu-devel] [PATCH 02/19] block: Assert drain_all is only called from main AioContext List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: kwolf@redhat.com, famz@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org Signed-off-by: Kevin Wolf --- block/io.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/block/io.c b/block/io.c index cf780c3cb0..b94740b8ff 100644 --- a/block/io.c +++ b/block/io.c @@ -330,6 +330,12 @@ void bdrv_drain_all_begin(void) BdrvNextIterator it; GSList *aio_ctxs = NULL, *ctx; + /* BDRV_POLL_WHILE() for a node can only be called from its own I/O thread + * or the main loop AioContext. We potentially use BDRV_POLL_WHILE() on + * nodes in several different AioContexts, so make sure we're in the main + * context. */ + assert(qemu_get_current_aio_context() == qemu_get_aio_context()); + block_job_pause_all(); for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) { -- 2.13.6