[CRIU] [PATCH 5/6] Hack to handle vmsplice fail: resolve later

[Pavel Emelianov]

On 7/25/19 4:14 AM, Abhishek Dubey wrote:
> hack to handle failing vmsplice from user-buffer to
> pipe: need to resolve

Please, write more descriptive comment to this patch, these off-by-one-s
are not clear.

> Signed-off-by: Abhishek Dubey <dubeyabhishek777 at gmail.com>
> ---
>  criu/page-pipe.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/criu/page-pipe.c b/criu/page-pipe.c
> index a821696..d73f223 100644
> --- a/criu/page-pipe.c
> +++ b/criu/page-pipe.c
> @@ -33,7 +33,7 @@ static int __ppb_resize_pipe(struct page_pipe_buf *ppb, unsigned long new_size)
>  {
>  	int ret;
>  
> -	ret = fcntl(ppb->p[0], F_SETPIPE_SZ, new_size * PAGE_SIZE);
> +	ret = fcntl(ppb->p[0], F_SETPIPE_SZ, new_size * PAGE_SIZE + 1);
>  	if (ret < 0)
>  		return -1;
>  
> @@ -41,7 +41,7 @@ static int __ppb_resize_pipe(struct page_pipe_buf *ppb, unsigned long new_size)
>  	BUG_ON(ret < ppb->pipe_size);
>  
>  	pr_debug("Grow pipe %x -> %x\n", ppb->pipe_size, ret);
> -	ppb->pipe_size = ret;
> +	ppb->pipe_size = ret -1;
>  
>  	return 0;
>  }
>