>> From: Wang Yong <wang.yong...@zte.com.cn>>> >> IOThread uses AioContext
>> event loop and does not run a GMainContext.>> Therefore,chardev cannot work
>> in IOThread,such as the chardev is>> used for colo-compare packets
>> reception.>> >> This patch makes the IOThread run the GMainContext event
>> loop,>> chardev and IOThread can work together.>> >> Signed-off-by: Wang
>> Yong <wang.yong...@zte.com.cn>>> Signed-off-by: Wang Guang
>> <wang.guan...@zte.com.cn>>> --->> include/sysemu/iothread.h | 4 ++++>>
>> iothread.c | 45
>> +++++++++++++++++++++++++++++++++++++++++++++>> 2 files changed, 49
>> insertions(+)>> >> diff --git a/include/sysemu/iothread.h
>> b/include/sysemu/iothread.h>> index e6da1a4..d2985b3 100644>> ---
>> a/include/sysemu/iothread.h>> +++ b/include/sysemu/iothread.h>> @@ -24,6
>> +24,9 @@ typedef struct {>> >> QemuThread thread>> AioContext
>> *ctx>> + GMainContext *worker_context>> + GMainLoop *main_loop>> +
>> GOnce once>> QemuMutex init_done_lock>> QemuCond init_done_cond
>> /* is thread initialization done? */>> bool stopping>> @@ -41,5 +44,6
>> @@ typedef struct {>> char *iothread_get_id(IOThread *iothread)>>
>> AioContext *iothread_get_aio_context(IOThread *iothread)>> void
>> iothread_stop_all(void)>> +GMainContext
>> *iothread_get_g_main_context(IOThread *iothread)>> >> #endif /* IOTHREAD_H
>> */>> diff --git a/iothread.c b/iothread.c>> index beeb870..44c8944 100644>>
>> --- a/iothread.c>> +++ b/iothread.c>> @@ -57,6 +57,23 @@ static void
>> *iothread_run(void *opaque)>> >> while
>> (!atomic_read(&iothread->stopping)) {>> aio_poll(iothread->ctx,
>> true)>> +>> + if (atomic_read(&iothread->worker_context)) {>> +
>> GMainLoop *loop>> +>> +
>> g_main_context_push_thread_default(iothread->worker_context)>> +
>> iothread->main_loop =>> +
>> g_main_loop_new(iothread->worker_context, TRUE)>> + loop =
>> iothread->main_loop>> +>> +
>> g_main_loop_run(iothread->main_loop)>> + iothread->main_loop =
>> NULL>> + g_main_loop_unref(loop)>> +>> +
>> g_main_context_pop_thread_default(iothread->worker_context)>> +
>> g_main_context_unref(iothread->worker_context)>> +
>> iothread->worker_context = NULL>> + }>> }>> >>
>> rcu_unregister_thread()>> @@ -73,6 +90,9 @@ static int iothread_stop(Object
>> *object, void *opaque)>> }>> iothread->stopping = true>>
>> aio_notify(iothread->ctx)>> + if (atomic_read(&iothread->main_loop)) {>>
>> + g_main_loop_quit(iothread->main_loop)>> + }>>
>> qemu_thread_join(&iothread->thread)>> return 0>> }>> @@ -125,6 +145,7
>> @@ static void iothread_complete(UserCreatable *obj, Error **errp)>> >>
>> qemu_mutex_init(&iothread->init_done_lock)>>
>> qemu_cond_init(&iothread->init_done_cond)>> + iothread->once = (GOnce)
>> G_ONCE_INIT>>In last review I suggested removing this type cast, otherwise
>> looks good. Drop>it and please add>>Reviewed-by: Fam Zheng <f...@redhat.com>>
Hi Fam,
Here, iothread->once can't be initialized with G_ONCE_INIT directly, must use
type cast.
if remove type cast , we will get an error.
iothread.c: In function ‘iothread_complete’:
/usr/include/glib-2.0/glib/gthread.h:101:21: error: expected expression before
‘{’ token
#define G_ONCE_INIT { G_ONCE_STATUS_NOTCALLED, NULL }
^
iothread.c:149:22: note: in expansion of macro ‘G_ONCE_INIT’
iothread->once = G_ONCE_INIT
Thanks
>> >> /* This assumes we are called from a thread with useful CPU
>> affinity for us>> * to inherit.>> @@ -309,3 +330,27 @@ void
>> iothread_stop_all(void)>> >> object_child_foreach(container,
>> iothread_stop, NULL)>> }>> +>> +static gpointer
>> iothread_g_main_context_init(gpointer opaque)>> +{>> + AioContext *ctx>>
>> + IOThread *iothread = opaque>> + GSource *source>> +>> +
>> iothread->worker_context = g_main_context_new()>> +>> + ctx =
>> iothread_get_aio_context(iothread)>> + source = aio_get_g_source(ctx)>> +
>> g_source_attach(source, iothread->worker_context)>> +
>> g_source_unref(source)>> +>> + aio_notify(iothread->ctx)>> + return
>> NULL>> +}>> +>> +GMainContext *iothread_get_g_main_context(IOThread
>> *iothread)>> +{>> + g_once(&iothread->once, iothread_g_main_context_init,
>> iothread)>> +>> + return iothread->worker_context>> +}>> -- >> 1.8.3.1>>
>> >>
原始邮件
发件人： <f...@redhat.com>
收件人：王勇10170530
抄送人： <pbonz...@redhat.com> <stefa...@redhat.com> <jasow...@redhat.com>
<zhangchen.f...@cn.fujitsu.com> <zhang.zhanghaili...@huawei.com>王广10165992
<lizhij...@cn.fujitsu.com> <qemu-devel@nongnu.org>
日 期 ：2017年08月31日 10:18
主 题 ：Re: [PATCHv5 01/03] qemu-iothread: IOThread supports theGMainContext event
loop
On Tue, 08/29 15:22, Wang yong wrote:
> From: Wang Yong <wang.yong...@zte.com.cn>
>
> IOThread uses AioContext event loop and does not run a GMainContext.
> Therefore,chardev cannot work in IOThread,such as the chardev is
> used for colo-compare packets reception.
>
> This patch makes the IOThread run the GMainContext event loop,
> chardev and IOThread can work together.
>
> Signed-off-by: Wang Yong <wang.yong...@zte.com.cn>
> Signed-off-by: Wang Guang <wang.guan...@zte.com.cn>
> ---
> include/sysemu/iothread.h | 4 ++++
> iothread.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 49 insertions(+)
>
> diff --git a/include/sysemu/iothread.h b/include/sysemu/iothread.h
> index e6da1a4..d2985b3 100644
> --- a/include/sysemu/iothread.h
> +++ b/include/sysemu/iothread.h
> @@ -24,6 +24,9 @@ typedef struct {
>
> QemuThread thread
> AioContext *ctx
> + GMainContext *worker_context
> + GMainLoop *main_loop
> + GOnce once
> QemuMutex init_done_lock
> QemuCond init_done_cond /* is thread initialization done? */
> bool stopping
> @@ -41,5 +44,6 @@ typedef struct {
> char *iothread_get_id(IOThread *iothread)
> AioContext *iothread_get_aio_context(IOThread *iothread)
> void iothread_stop_all(void)
> +GMainContext *iothread_get_g_main_context(IOThread *iothread)
>
> #endif /* IOTHREAD_H */
> diff --git a/iothread.c b/iothread.c
> index beeb870..44c8944 100644
> --- a/iothread.c
> +++ b/iothread.c
> @@ -57,6 +57,23 @@ static void *iothread_run(void *opaque)
>
> while (!atomic_read(&iothread->stopping)) {
> aio_poll(iothread->ctx, true)
> +
> + if (atomic_read(&iothread->worker_context)) {
> + GMainLoop *loop
> +
> + g_main_context_push_thread_default(iothread->worker_context)
> + iothread->main_loop =
> + g_main_loop_new(iothread->worker_context, TRUE)
> + loop = iothread->main_loop
> +
> + g_main_loop_run(iothread->main_loop)
> + iothread->main_loop = NULL
> + g_main_loop_unref(loop)
> +
> + g_main_context_pop_thread_default(iothread->worker_context)
> + g_main_context_unref(iothread->worker_context)
> + iothread->worker_context = NULL
> + }
> }
>
> rcu_unregister_thread()
> @@ -73,6 +90,9 @@ static int iothread_stop(Object *object, void *opaque)
> }
> iothread->stopping = true
> aio_notify(iothread->ctx)
> + if (atomic_read(&iothread->main_loop)) {
> + g_main_loop_quit(iothread->main_loop)
> + }
> qemu_thread_join(&iothread->thread)
> return 0
> }
> @@ -125,6 +145,7 @@ static void iothread_complete(UserCreatable *obj, Error
> **errp)
>
> qemu_mutex_init(&iothread->init_done_lock)
> qemu_cond_init(&iothread->init_done_cond)
> + iothread->once = (GOnce) G_ONCE_INIT
In last review I suggested removing this type cast, otherwise looks good. Drop
it and please add
Reviewed-by: Fam Zheng <f...@redhat.com>
>
> /* This assumes we are called from a thread with useful CPU affinity for
> us
> * to inherit.
> @@ -309,3 +330,27 @@ void iothread_stop_all(void)
>
> object_child_foreach(container, iothread_stop, NULL)
> }
> +
> +static gpointer iothread_g_main_context_init(gpointer opaque)
> +{
> + AioContext *ctx
> + IOThread *iothread = opaque
> + GSource *source
> +
> + iothread->worker_context = g_main_context_new()
> +
> + ctx = iothread_get_aio_context(iothread)
> + source = aio_get_g_source(ctx)
> + g_source_attach(source, iothread->worker_context)
> + g_source_unref(source)
> +
> + aio_notify(iothread->ctx)
> + return NULL
> +}
> +
> +GMainContext *iothread_get_g_main_context(IOThread *iothread)
> +{
> + g_once(&iothread->once, iothread_g_main_context_init, iothread)
> +
> + return iothread->worker_context
> +}
> --
> 1.8.3.1
>
>
