*** This bug is a duplicate of bug 1065657 ***
https://bugs.launchpad.net/bugs/1065657
** This bug has been marked a duplicate of bug 1065657
compiz leaks window handles (and pixmaps?)
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https://bugs.launchpad.net/bugs/1415926
Title:
Compiz leaks Windows resources
Status in compiz package in Ubuntu:
New
Bug description:
Steps to reproduce:
1. Run "xrestop" and check how many Windows Compiz uses
2. Run large number of other (3D) applications
3. Redo 1)
Actual outcome:
- X Windows references by Compiz constantly increases although all run
programs have been closed
Expected outcome:
- No leakage, of X resources or other things
This happens with latest Compiz version both on Ubuntu 14.04 and
Ubuntu 14.10.
How did I notice this:
- Running many application causes random OOM killings with recent (end of
January intel-drm-next) kernel built from sources, on a BDW machine
- When reproducing the issue, I first thought this a kernel leakage because
according to "slabtop", kernel vm_page_struct object numbers were increasing
- From kernel backtraces on OOM-kill I could see that it was triggered by
graphics memory allocation failure so I checked from sysfs whether DRI/GEM
objects were leaking, but that didn't show anything leaking
- However, with "xrestop" I could see that Compiz was leaking Windows
resources. I think that explains the vm_page_struct object count increase on
the kernel side, i.e. that was just result of Compiz leakage on user-space
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