[Intel-gfx] [PATCH 1/6] igt_kms: don't leak the mmap used for cairo

[Chris Wilson]

On Mon, Dec 30, 2013 at 01:56:48PM -0200, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> When we call kmstest_get_cairo_ctx() and create a context, we do a
> gem_mmap. The problem is that we lose the mmap pointer, so we leak it.
> This patch stores the pointer and frees it at kmstest_remove_fb.
> 
> Huge test suites like kms_flip do this operation thousands of times,
> which makes the virtual memory size increase until the test suite gets
> killed. Today, without this patch, we can't even run 50% of the
> kms_flip tests due to this problem. To test this, just "./kms_flip",
> then run "top" and sort it by the VIRT column.

Bleh. kmstest is a bad example of how to handle cairo object lifetimes
and this patch just makes it worse.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre