Re: [PATCH 5.15 000/159] 5.15.116-rc1 review

[Guenter Roeck <linux@roeck-us.net>]

Hi,

On Fri, Jun 09, 2023 at 04:07:00AM -0700, Guenter Roeck wrote:
> On Wed, Jun 07, 2023 at 10:15:03PM +0200, Greg Kroah-Hartman wrote:
> > This is the start of the stable review cycle for the 5.15.116 release.
> > There are 159 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> > 
> > Responses should be made by Fri, 09 Jun 2023 20:07:31 +0000.
> > Anything received after that time might be too late.
> > 
> 
> Build results:
> 	total: 155 pass: 155 fail: 0
> Qemu test results:
> 	total: 499 pass: 498 fail: 1
> Failed tests:
> 	arm:kudo-bmc:multi_v7_defconfig:npcm:usb0.1:nuvoton-npcm730-kudo:rootfs
> 
> The test failure is spurious and not new. I observe it randomly on
> multi_v7_defconfig builds, primarily on npcm platforms. There is no error
> message, just a stalled boot. I have been trying to bisect for a while,
> but I have not been successful so far. No immediate concern; I just wanted
> to mention it in case someone else hits the same or a similar problem.
> 

I managed to revise my bisect script sufficiently enough to get reliable
results. It looks like the culprit is commit 503e554782c9 (" debugobject:
Ensure pool refill (again)"); see bisect log below. Bisect on four
different systems all have the same result. After reverting this patch,
I do not see the problem anymore (again, confirmed on four different
systems). If anyone has an idea how to debug this, please let me know.
I'll be happy to give it a try.

Thanks,
Guenter

---
# bad: [7349e40704a0209a2af8b37fa876322209de9684] Linux 5.15.116
# good: [d214f240b0f61480f9dbc4384cef03f6a55e5d03] Linux 5.15.100
git bisect start 'HEAD' 'v5.15.100'
# good: [11c58a0c1937c157dbdf82d5ab634d68c99f3098] x86/MCE/AMD: Use an u64 for bank_map
git bisect good 11c58a0c1937c157dbdf82d5ab634d68c99f3098
# bad: [e9c5fc4f3f35e769932158a7347ec245be5cefb9] drm/amd/display: Use DC_LOG_DC in the trasform pixel function
git bisect bad e9c5fc4f3f35e769932158a7347ec245be5cefb9
# good: [3dc3a86b88bda88b4ac859b18559385f02932e78] SMB3: Close deferred file handles in case of handle lease break
git bisect good 3dc3a86b88bda88b4ac859b18559385f02932e78
# bad: [b13e20cc58e438b2d3473147329fe3fe80e3bc09] perf stat: Separate bperf from bpf_profiler
git bisect bad b13e20cc58e438b2d3473147329fe3fe80e3bc09
# bad: [43b2f7d690697182beed6f71aa57b7249d3cfc9c] ubifs: Fix memory leak in do_rename
git bisect bad 43b2f7d690697182beed6f71aa57b7249d3cfc9c
# good: [8444b46e163aa9559a0af0381a1d230ec4146eb2] mtd: core: fix nvmem error reporting
git bisect good 8444b46e163aa9559a0af0381a1d230ec4146eb2
# good: [f76fcb9d43ec014ac4a1bb983768696d5b032df9] dm flakey: fix a crash with invalid table line
git bisect good f76fcb9d43ec014ac4a1bb983768696d5b032df9
# bad: [aa6ff950f875ebc9a01dc53666a1af17004924ad] arm64: dts: qcom: sdm845: correct dynamic power coefficients - again
git bisect bad aa6ff950f875ebc9a01dc53666a1af17004924ad
# good: [06106efa20f74a14674ae53def7abaddd851f7e2] perf auxtrace: Fix address filter entire kernel size
git bisect good 06106efa20f74a14674ae53def7abaddd851f7e2
# bad: [503e554782c916aec553f790298564a530cf1778] debugobject: Ensure pool refill (again)
git bisect bad 503e554782c916aec553f790298564a530cf1778
# good: [6b84832966a094a1b8305b1a42a4f157a3121258] perf intel-pt: Fix CYC timestamps after standalone CBR
git bisect good 6b84832966a094a1b8305b1a42a4f157a3121258
# first bad commit: [503e554782c916aec553f790298564a530cf1778] debugobject: Ensure pool refill (again)