[Qemu-devel] [PATCH 3/4] migration: Make explicit that we are quitting multifd

Juan Quintela posted 4 patches 6 years, 6 months ago
Maintainers: Juan Quintela <quintela@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>
[Qemu-devel] [PATCH 3/4] migration: Make explicit that we are quitting multifd
Posted by Juan Quintela 6 years, 6 months ago
We add a bool to indicate that.

Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 migration/ram.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/migration/ram.c b/migration/ram.c
index 87bb7da8e2..eb6716710e 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -677,6 +677,8 @@ typedef struct {
     QemuMutex mutex;
     /* is this channel thread running */
     bool running;
+    /* should this thread finish */
+    bool quit;
     /* array of pages to receive */
     MultiFDPages_t *pages;
     /* packet allocated len */
@@ -1266,6 +1268,7 @@ static void multifd_recv_terminate_threads(Error *err)
         MultiFDRecvParams *p = &multifd_recv_state->params[i];
 
         qemu_mutex_lock(&p->mutex);
+        p->quit = true;
         /* We could arrive here for two reasons:
            - normal quit, i.e. everything went fine, just finished
            - error quit: We close the channels so the channel threads
@@ -1288,6 +1291,7 @@ int multifd_load_cleanup(Error **errp)
         MultiFDRecvParams *p = &multifd_recv_state->params[i];
 
         if (p->running) {
+            p->quit = true;
             qemu_thread_join(&p->thread);
         }
         object_unref(OBJECT(p->c));
@@ -1351,6 +1355,10 @@ static void *multifd_recv_thread(void *opaque)
         uint32_t used;
         uint32_t flags;
 
+        if (p->quit) {
+            break;
+        }
+
         ret = qio_channel_read_all_eof(p->c, (void *)p->packet,
                                        p->packet_len, &local_err);
         if (ret == 0) {   /* EOF */
@@ -1422,6 +1430,7 @@ int multifd_load_setup(void)
 
         qemu_mutex_init(&p->mutex);
         qemu_sem_init(&p->sem_sync, 0);
+        p->quit = false;
         p->id = i;
         p->pages = multifd_pages_init(page_count);
         p->packet_len = sizeof(MultiFDPacket_t)
-- 
2.21.0


Re: [Qemu-devel] [PATCH 3/4] migration: Make explicit that we are quitting multifd
Posted by Dr. David Alan Gilbert 6 years, 6 months ago
* Juan Quintela (quintela@redhat.com) wrote:
> We add a bool to indicate that.
> 
> Signed-off-by: Juan Quintela <quintela@redhat.com>

OK, similar to send.


Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

> ---
>  migration/ram.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/migration/ram.c b/migration/ram.c
> index 87bb7da8e2..eb6716710e 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -677,6 +677,8 @@ typedef struct {
>      QemuMutex mutex;
>      /* is this channel thread running */
>      bool running;
> +    /* should this thread finish */
> +    bool quit;
>      /* array of pages to receive */
>      MultiFDPages_t *pages;
>      /* packet allocated len */
> @@ -1266,6 +1268,7 @@ static void multifd_recv_terminate_threads(Error *err)
>          MultiFDRecvParams *p = &multifd_recv_state->params[i];
>  
>          qemu_mutex_lock(&p->mutex);
> +        p->quit = true;
>          /* We could arrive here for two reasons:
>             - normal quit, i.e. everything went fine, just finished
>             - error quit: We close the channels so the channel threads
> @@ -1288,6 +1291,7 @@ int multifd_load_cleanup(Error **errp)
>          MultiFDRecvParams *p = &multifd_recv_state->params[i];
>  
>          if (p->running) {
> +            p->quit = true;
>              qemu_thread_join(&p->thread);
>          }
>          object_unref(OBJECT(p->c));
> @@ -1351,6 +1355,10 @@ static void *multifd_recv_thread(void *opaque)
>          uint32_t used;
>          uint32_t flags;
>  
> +        if (p->quit) {
> +            break;
> +        }
> +
>          ret = qio_channel_read_all_eof(p->c, (void *)p->packet,
>                                         p->packet_len, &local_err);
>          if (ret == 0) {   /* EOF */
> @@ -1422,6 +1430,7 @@ int multifd_load_setup(void)
>  
>          qemu_mutex_init(&p->mutex);
>          qemu_sem_init(&p->sem_sync, 0);
> +        p->quit = false;
>          p->id = i;
>          p->pages = multifd_pages_init(page_count);
>          p->packet_len = sizeof(MultiFDPacket_t)
> -- 
> 2.21.0
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK