Bug 110276

Summary: Memory leak on kernel 5.0 using Vulkan applications, fixed on drm-tip and 5.1-rc1
Product: DRI Reporter: leozinho29_eu
Component: DRM/otherAssignee: Christian König <ckoenig.leichtzumerken>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium CC: intel-gfx-bugs, jani.nikula
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard: Triaged, ReadyForDev
i915 platform: SKL i915 features: GEM/Other
Attachments:
Description Flags
Video showing the 4 MB leak in 25 seconds none

Description leozinho29_eu 2019-03-28 15:29:36 UTC 
Created attachment 143800 [details]
Video showing the 4 MB leak in 25 seconds

It was found that the kernel 5.0 has a memory leak when Vulkan applications are used. It seems this leak can be even more intense than the one from bug 107899.

On drm-tip and linux-git, the commit 61a98b1b9a8c7a21a2d666a090dcf5f1c70c659f fixes this leak. However, the leak is present on the kernel 5.0.5, currently the latest stable.

vulkan-smoketest is enough to trigger the leak. On slabtop, it shows:

80275  80275 100%    0,62K   3211       25     51376K i915_request

Steps to reproduce:

1) Open a Vulkan application, for example, vulkan-smoketest.

System information:

OS: Xubuntu 18.04;
Kernel: 5.0.0-8 (Disco Dingo) to 5.0.5;
CPU: Intel Core i3-6100U;
GPU: Intel HD Graphics 520;
Memory: 8 GB.
Comment 1 Chris Wilson 2019-03-28 21:35:13 UTC 
iirc the fix is commit 61a98b1b9a8c7a21a2d666a090dcf5f1c70c659f
Author: Christian König <ckoenig.leichtzumerken@gmail.com>
Date:   Tue Dec 11 18:34:41 2018 +0800

    drm/syncobj: remove drm_syncobj_cb and cleanup
    
    This completes "drm/syncobj: Drop add/remove_callback from driver
    interface" and cleans up the implementation a bit.
    
    Signed-off-by: Christian König <christian.koenig@amd.com>
    Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
    Link: https://patchwork.freedesktop.org/patch/266255/
Comment 2 Lakshmi 2019-03-29 07:12:41 UTC 
Fix available in drm-tip and 5.1-rc1 but not in stable branch 5.0.5.
Comment 3 Francesco Balestrieri 2019-06-03 06:42:13 UTC 
> Fix available in drm-tip and 5.1-rc1 but not in stable branch 5.0.5.

Still, enough for us to close this, isn't it?
Comment 4 Jani Nikula 2019-06-04 07:47:59 UTC 
Fixed upstream and not our bug. Move to DRM/other, assign to Christian to decide what to do with the potential stable backport.
Comment 5 Martin Peres 2019-10-14 13:34:43 UTC 
Linux 5.0 is EOLed. Please use a supported kernel (see https://www.kernel.org/). Closing!

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