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[Qemu-devel] [PATCH v2 for-2.6 4/5] aio-posix: Skip external nodes in ai
From: |
Fam Zheng |
Subject: |
[Qemu-devel] [PATCH v2 for-2.6 4/5] aio-posix: Skip external nodes in aio_dispatch |
Date: |
Fri, 22 Apr 2016 18:56:03 +0800 |
aio_poll doesn't poll the external nodes so this should never be true,
but aio_ctx_dispatch may get notified by the events from GSource. To
make bdrv_drained_begin effective in main loop, we should check the
is_external flag here too.
This could result in a few busy polls because the fd is left unhandled,
but the drained section is only transient and shouldn't be longer than
one or two event loop iterations.
Signed-off-by: Fam Zheng <address@hidden>
---
aio-posix.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/aio-posix.c b/aio-posix.c
index 7fd565f..a7c9304 100644
--- a/aio-posix.c
+++ b/aio-posix.c
@@ -323,6 +323,7 @@ bool aio_dispatch(AioContext *ctx)
if (!node->deleted &&
(revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) &&
+ aio_node_check(ctx, node->is_external) &&
node->io_read) {
node->io_read(node->opaque);
@@ -333,6 +334,7 @@ bool aio_dispatch(AioContext *ctx)
}
if (!node->deleted &&
(revents & (G_IO_OUT | G_IO_ERR)) &&
+ aio_node_check(ctx, node->is_external) &&
node->io_write) {
node->io_write(node->opaque);
progress = true;
--
2.8.0
- [Qemu-devel] [PATCH v2 for-2.6 0/5] block: Fix assertion failure at mirror exit, Fam Zheng, 2016/04/22
- [Qemu-devel] [PATCH v2 for-2.6 1/5] iohandler: Introduce iohandler_get_aio_context, Fam Zheng, 2016/04/22
- [Qemu-devel] [PATCH v2 for-2.6 2/5] event-notifier: Add "is_external" parameter, Fam Zheng, 2016/04/22
- [Qemu-devel] [PATCH v2 for-2.6 3/5] virtio: Mark host notifiers as external, Fam Zheng, 2016/04/22
- [Qemu-devel] [PATCH v2 for-2.6 4/5] aio-posix: Skip external nodes in aio_dispatch,
Fam Zheng <=
- [Qemu-devel] [PATCH v2 for-2.6 5/5] mirror: Workaround for unexpected iohandler events during completion, Fam Zheng, 2016/04/22
- Re: [Qemu-devel] [PATCH v2 for-2.6 0/5] block: Fix assertion failure at mirror exit, Michael S. Tsirkin, 2016/04/22