[Bug 202537] amdgpu/DC failed to reserve new abo buffer before flip

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=202537

--- Comment #23 from Bernd Steinhauser (linux at bernd-steinhauser.de) ---
(In reply to Paul Menzel from comment #22)
> Bernd, what triggers this on your system? What is your test case? Start some
> program?
basically start the system, log in, ensuring that /sys/kernel/debug/kmemleak is
empty, then initiating the scan and waiting for the result.
I found that testing without the login (starting sddm in my case) can be enough
to spot the memleaks, but you can't be sure.
Also, I think that putting some more work there for the gpu (e.g. playing a
video) helps to spot more memleaks quicker, thus getting a more reliable result
quicker, but I it doesn't seem necessary.

In case I don't find memleaks, I still repeat the scan routing a few times, do
something else in the meantime (like preparing the next test version) and then
before rebooting do the scan once more, just to be sure.
So in total – on my rather slow system – every version is tested for about
30min, although in case of a bad version about 5min is enough.

Anyway, back to the original topic. bisecting this time went much more smoothly
and much quicker than before and I can actually present the result already, see
below.
I tried to apply the fix on top of 4.20.10, but that doesn't compile as it most
likely depends on other commits.
So unfortunately can't cross-check this at the moment.
@Paul: might be a good idea if you check this as well, meaning to test
b61857b5e and its parent.

git bisect start '--term-old' 'unfixed' '--term-new' 'fixed'
# unfixed: [8fe28cb58bcb235034b64cbbb7550a8a43fd88be] Linux 4.20
git bisect unfixed 8fe28cb58bcb235034b64cbbb7550a8a43fd88be
# fixed: [256445aee13f4de36cb47c13a9560b5d74faacd2] drm/amdgpu: remove some old
unused dpm helpers
git bisect fixed 256445aee13f4de36cb47c13a9560b5d74faacd2
# unfixed: [e0c38a4d1f196a4b17d2eba36afff8f656a4f1de] Merge
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
git bisect unfixed e0c38a4d1f196a4b17d2eba36afff8f656a4f1de
# unfixed: [9ef10340749e1da0c7fde609cedd5360f8484a0b] Merge tag
'xtensa-20181228' of git://github.com/jcmvbkbc/linux-xtensa
git bisect unfixed 9ef10340749e1da0c7fde609cedd5360f8484a0b
# unfixed: [fcf010449ebe1db0cb68b2c6410972a782f2bd14] Merge tag 'kgdb-4.21-rc1'
of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux
git bisect unfixed fcf010449ebe1db0cb68b2c6410972a782f2bd14
# unfixed: [9b286efeb5eb5aaa2712873fc1f928b2f879dbde] Merge branch 'for-linus'
of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect unfixed 9b286efeb5eb5aaa2712873fc1f928b2f879dbde
# unfixed: [ac5eed2b41776b05cf03aac761d3bb5e64eea24c] Merge branch
'perf-urgent-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect unfixed ac5eed2b41776b05cf03aac761d3bb5e64eea24c
# unfixed: [5dc3fc5a7835f6b98184d2b8df909c5230c37a2c] drm/amd/display: Check if
registers are available before accessing
git bisect unfixed 5dc3fc5a7835f6b98184d2b8df909c5230c37a2c
# fixed: [87076c8829465b8ae71225f7e639e0e28ab4b4a2] drm/amd/display: Re-enable
CRC capture following modeset
git bisect fixed 87076c8829465b8ae71225f7e639e0e28ab4b4a2
# fixed: [84d3245599f527138c4d4b87deed14a7e85cd81b] drm/amdgpu: Add missing
power attribute to APU check
git bisect fixed 84d3245599f527138c4d4b87deed14a7e85cd81b
# unfixed: [ae6d343541bb75958e9535d056adaf4ff6a66d6a] drm/ttm: add lru notify
to bo driver v2
git bisect unfixed ae6d343541bb75958e9535d056adaf4ff6a66d6a
# fixed: [5d50fcbda7b0acd301bb1fc3d828df0aa29237b8] drm/ttm: stop always moving
BOs on the LRU on page fault
git bisect fixed 5d50fcbda7b0acd301bb1fc3d828df0aa29237b8
# fixed: [d7337ca2640cde21ff178bd78f01d94cd5ea2e08] drm/amd/powerplay: support
retrieving and adjusting SOC clock power levels V2
git bisect fixed d7337ca2640cde21ff178bd78f01d94cd5ea2e08
# fixed: [b61857b5e365889d67a6296c413df396032d374d] drm/amdgpu: set
bulk_moveable to false when lru changed v2
git bisect fixed b61857b5e365889d67a6296c413df396032d374d
# first fixed commit: [b61857b5e365889d67a6296c413df396032d374d] drm/amdgpu:
set bulk_moveable to false when lru changed v2
commit b61857b5e365889d67a6296c413df396032d374d
Author: Chunming Zhou <david1.zhou at amd.com>
Date:   Thu Jan 10 15:49:54 2019 +0800

    drm/amdgpu: set bulk_moveable to false when lru changed v2
····
    if lru is changed, we cannot do bulk moving.
    v2:
    root bo isn't in bulk moving, skip its change.
····
    Signed-off-by: Chunming Zhou <david1.zhou at amd.com>
    Reviewed-by: Christian König <christian.koenig at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

:040000 040000 3544338af6c797a518386198369dc4766961d151
392a4c14309bd108b20046609138f7bc2859f3f7 M      drivers

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