[CRIU] [PATCH 07/10] deduplication: add punching holes in "parent"

[Andrew Vagin]

On Tue, Nov 19, 2013 at 02:28:26PM +0400, Tikhomirov Pavel wrote:
> punch where coresponding data was updated in curent snapshot
> 
> Signed-off-by: Tikhomirov Pavel <snorcht at gmail.com>
> ---
>  cr-dedup.c |   12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/cr-dedup.c b/cr-dedup.c
> index a8df351..6bc43f0 100644
> --- a/cr-dedup.c
> +++ b/cr-dedup.c
> @@ -1,3 +1,4 @@
> +#include <linux/falloc.h>
>  #include <unistd.h>
>  
>  #include "crtools.h"
> @@ -101,6 +102,17 @@ int cr_dedup_one_pagemap(int pid)
>  		off_real = lseek(prp->fd_pg, 0, SEEK_CUR);
>  
>  		/*Here to punch that pagemap*/
> +		if (!pr.pe->in_parent && !prp->pe->in_parent) {
> +			/* punch */

redundant comment

> +			pr_info("Punch!/%lu/%lu/\n", off_real, min(piov_end, iov_end) - off);

pr_debug

> +
> +			ret = fallocate(prp->fd_pg, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
> +					off_real, min(piov_end, iov_end) - off);
> +			if (ret != 0) {
> +				pr_err("Error punching hole : %d\n", errno);

pr_perror

> +				goto exit;
> +			}
> +		}
>  
>  		if (piov_end < iov_end) {
>  			off = piov_end;
> -- 
> 1.7.9.5
> 
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