tree d96e6dd310eb42e5f6c00dcc4ad8a22f6e0a92cd
parent 17ee4f49ab2c802c7818fa71c4e7e351a7230b86
author Jens Axboe <jens.axboe@oracle.com> 1181906062 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1181906062 +0200

splice: fix leak of pages on short splice to pipe

If the destination pipe is full and we already transferred
data, we break out instead of waiting for more pipe room.
The exit logic looks at spd->nr_pages to see if we moved
everything inside the spd container, but we decrement that
variable in the loop to decide when spd has emptied.

Instead we want to compare to the original page count in
the spd, so cache that in a local variable.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>