From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:34851) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gvldQ-0006K3-MD for qemu-devel@nongnu.org; Mon, 18 Feb 2019 11:19:13 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gvldP-0002QP-DK for qemu-devel@nongnu.org; Mon, 18 Feb 2019 11:19:12 -0500 From: Kevin Wolf Date: Mon, 18 Feb 2019 17:18:19 +0100 Message-Id: <20190218161822.3573-10-kwolf@redhat.com> In-Reply-To: <20190218161822.3573-1-kwolf@redhat.com> References: <20190218161822.3573-1-kwolf@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH 09/12] block: Fix AioContext switch for drained node List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: kwolf@redhat.com, mreitz@redhat.com, eblake@redhat.com, stefanha@redhat.com, berrange@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org When a drained node changes its AioContext, we need to move its aio_disable_external() to the new context, too. Without this fix, drain_end will try to reenable the new context, which has never been disabled, so an assertion failure is triggered. Signed-off-by: Kevin Wolf --- block.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/block.c b/block.c index 17bc1d3dca..aefb5701f5 100644 --- a/block.c +++ b/block.c @@ -5227,6 +5227,9 @@ void bdrv_detach_aio_context(BlockDriverState *bs) bdrv_detach_aio_context(child->bs); } =20 + if (bs->quiesce_counter) { + aio_enable_external(bs->aio_context); + } bs->aio_context =3D NULL; } =20 @@ -5240,6 +5243,10 @@ void bdrv_attach_aio_context(BlockDriverState *bs, return; } =20 + if (bs->quiesce_counter) { + aio_disable_external(new_context); + } + bs->aio_context =3D new_context; =20 QLIST_FOREACH(child, &bs->children, next) { --=20 2.20.1