diff mbox

qemu-nbd: remove unnecessary qemu_notify_event()

Message ID 1437998061-22771-1-git-send-email-pbonzini@redhat.com
State New
Headers show

Commit Message

Paolo Bonzini July 27, 2015, 11:54 a.m. UTC
This was needed when qemu-nbd was using qemu_set_fd_handler2.  It is
not needed anymore now that nbd_update_server_fd_handler is called
whenever nbd_can_accept() can change from false to true.
nbd_update_server_fd_handler will call qemu_set_fd_handler(),
which will call qemu_notify_event().

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 qemu-nbd.c | 1 -
 1 file changed, 1 deletion(-)

Comments

Max Reitz July 27, 2015, 2:44 p.m. UTC | #1
On 27.07.2015 13:54, Paolo Bonzini wrote:
> This was needed when qemu-nbd was using qemu_set_fd_handler2.  It is
> not needed anymore now that nbd_update_server_fd_handler is called
> whenever nbd_can_accept() can change from false to true.
> nbd_update_server_fd_handler will call qemu_set_fd_handler(),
> which will call qemu_notify_event().
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>   qemu-nbd.c | 1 -
>   1 file changed, 1 deletion(-)
>
> diff --git a/qemu-nbd.c b/qemu-nbd.c
> index 5106b80..d9644b2 100644
> --- a/qemu-nbd.c
> +++ b/qemu-nbd.c
> @@ -362,7 +362,6 @@ static void nbd_client_closed(NBDClient *client)
>           state = TERMINATE;
>       }
>       nbd_update_server_fd_handler(server_fd);
> -    qemu_notify_event();
>       nbd_client_put(client);
>   }

Reviewed-by: Max Reitz <mreitz@redhat.com>
Fam Zheng July 28, 2015, 4:09 a.m. UTC | #2
On Mon, 07/27 13:54, Paolo Bonzini wrote:
> This was needed when qemu-nbd was using qemu_set_fd_handler2.  It is
> not needed anymore now that nbd_update_server_fd_handler is called
> whenever nbd_can_accept() can change from false to true.
> nbd_update_server_fd_handler will call qemu_set_fd_handler(),
> which will call qemu_notify_event().
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  qemu-nbd.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/qemu-nbd.c b/qemu-nbd.c
> index 5106b80..d9644b2 100644
> --- a/qemu-nbd.c
> +++ b/qemu-nbd.c
> @@ -362,7 +362,6 @@ static void nbd_client_closed(NBDClient *client)
>          state = TERMINATE;
>      }
>      nbd_update_server_fd_handler(server_fd);
> -    qemu_notify_event();
>      nbd_client_put(client);
>  }
>  
> -- 
> 2.4.3
> 
> 

Reviewed-by: Fam Zheng <famz@redhat.com>

A question not related to this patch: unlike aio_set_fd_handler,
qemu_set_fd_handler doesn't call qemu_notify_event for the "delete" branch. Is
that intended?
Paolo Bonzini July 28, 2015, 12:34 p.m. UTC | #3
On 28/07/2015 06:09, Fam Zheng wrote:
> On Mon, 07/27 13:54, Paolo Bonzini wrote:
>> This was needed when qemu-nbd was using qemu_set_fd_handler2.  It is
>> not needed anymore now that nbd_update_server_fd_handler is called
>> whenever nbd_can_accept() can change from false to true.
>> nbd_update_server_fd_handler will call qemu_set_fd_handler(),
>> which will call qemu_notify_event().
>>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> ---
>>  qemu-nbd.c | 1 -
>>  1 file changed, 1 deletion(-)
>>
>> diff --git a/qemu-nbd.c b/qemu-nbd.c
>> index 5106b80..d9644b2 100644
>> --- a/qemu-nbd.c
>> +++ b/qemu-nbd.c
>> @@ -362,7 +362,6 @@ static void nbd_client_closed(NBDClient *client)
>>          state = TERMINATE;
>>      }
>>      nbd_update_server_fd_handler(server_fd);
>> -    qemu_notify_event();
>>      nbd_client_put(client);
>>  }
>>  
>> -- 
>> 2.4.3
>>
>>
> 
> Reviewed-by: Fam Zheng <famz@redhat.com>
> 
> A question not related to this patch: unlike aio_set_fd_handler,
> qemu_set_fd_handler doesn't call qemu_notify_event for the "delete" branch. Is
> that intended?

Yes.  In fact I think qemu_notify_event() is not needed at all in
qemu_set_fd_handler() because there are no concurrent ppoll() calls
during a qemu_set_fd_handler().

Paolo
diff mbox

Patch

diff --git a/qemu-nbd.c b/qemu-nbd.c
index 5106b80..d9644b2 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -362,7 +362,6 @@  static void nbd_client_closed(NBDClient *client)
         state = TERMINATE;
     }
     nbd_update_server_fd_handler(server_fd);
-    qemu_notify_event();
     nbd_client_put(client);
 }