Re: [Qemu-devel] [PATCH 5/6] Don't abort on out of memory when creating page cache

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Orit Wasserman (owasserm@redhat.com) wrote:
> Signed-off-by: Orit Wasserman <owasserm@redhat.com>
> ---
>  arch_init.c  | 16 ++++++++++++++--
>  page_cache.c | 18 ++++++++++++++----
>  2 files changed, 28 insertions(+), 6 deletions(-)
> 
> diff --git a/arch_init.c b/arch_init.c
> index 5eff80b..806d096 100644
> --- a/arch_init.c
> +++ b/arch_init.c
> @@ -664,8 +664,20 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
>              DPRINTF("Error creating cache\n");
>              return -1;
>          }
> -        XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
> -        XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
> +
> +        /* We prefer not to abort if there is no memory */
> +        XBZRLE.encoded_buf = g_try_malloc0(TARGET_PAGE_SIZE);
> +        if (!XBZRLE.encoded_buf) {
> +            DPRINTF("Error allocating encoded_buf\n");
> +            return -1;
> +        }
> +
> +        XBZRLE.current_buf = g_try_malloc(TARGET_PAGE_SIZE);
> +        if (!XBZRLE.current_buf) {
> +            DPRINTF("Error allocating current_buf\n");
> +            return -1;
> +        }

Would it be best to free encoded_buf in this second exit case?

Dave
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK