Re: [PATCH RESEND] coredump: Ensure proper size of sparse core files

[Christoph Hellwig]

On Mon, Jan 16, 2017 at 10:42:43PM -0500, David Miller wrote:
> The lseek() done by dump_skip() should extend the file properly.

lseek never extends a file.  It just moves the current file position.
So if you do not have a write after the lseek it does nothing.