On 02.09.2014 12:01, Stefan Hajnoczi wrote:
The src_cache option (-T) specifies the cache mode for backing files.
It applies both the image's old backing file as well as the new backing
file:

   ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, src_flags,
                   old_backing_drv, &local_err);
   if (ret) {
       ...
   }
   if (out_baseimg[0]) {
       bs_new_backing = bdrv_new("new_backing", &error_abort);
       ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, src_flags,
                       new_backing_drv, &local_err);
       if (ret) {
           ...
       }
   }

The documentation only mentions the new backing file but it really
applies to both.

Suggested-by: Jeff Nelson <jenel...@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
  qemu-img.texi | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Max Reitz <mre...@redhat.com>

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