Re: [Qemu-devel] [PATCH] iothread: fix epollfd leak in the process of delIOThread

[Peter Xu <peterx@redhat.com>]

On Wed, May 16, 2018 at 09:38:31AM +0800, Fam Zheng wrote:
> On Tue, 05/15 20:00, Jie Wang wrote:
> > When we call addIOThread, the epollfd created in aio_context_setup,
> > but not close it in the process of delIOThread, so the epollfd will leak.
> > 
> > Signed-off-by: Jie Wang <wangjie88@huawei.com>
> > ---
> >  iothread.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/iothread.c b/iothread.c
> > index aff1281..23ac0a8 100644
> > --- a/iothread.c
> > +++ b/iothread.c
> > @@ -128,6 +128,7 @@ static void iothread_instance_finalize(Object *obj)
> >       * GSources first before destroying any GMainContext.
> >       */
> >      if (iothread->ctx) {
> > +        close(iothread->ctx->epollfd);
> >          aio_context_unref(iothread->ctx);
> >          iothread->ctx = NULL;
> >      }
> > -- 
> > 1.8.3.1
> > 
> 
> Please add an aio_context_destroy() function in aio-posix.c and call it from
> aio_context_finalize(). IOThread code should not touch AioContext internals.

I believe Fam means aio_ctx_finalize().

> Also please remember to wrap the close() code in CONFIG_EPOLL_CREATE1.  An empty
> function may need to be added to aio-win32.c, too.

Agreed.

-- 
Peter Xu