linux-kernel - Re: linux-next: Tree for Mar 14 (mips qemu failure bisected)

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Message-ID: <20160316001713.GA4412@roeck-us.net>
Date:	Tue, 15 Mar 2016 17:17:13 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Qais Yousef <qsyousef@...il.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Qais Yousef <qais.yousef@...tec.com>,
	Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org
Subject: Re: linux-next: Tree for Mar 14 (mips qemu failure bisected)

On Tue, Mar 15, 2016 at 09:55:06PM +0000, Qais Yousef wrote:
> Hi Guenter,
> 
> On 15/03/2016 05:26, Guenter Roeck wrote:
> >On Mon, Mar 14, 2016 at 07:37:29AM -0700, Guenter Roeck wrote:
> >>On Mon, Mar 14, 2016 at 05:40:37PM +1100, Stephen Rothwell wrote:
> >>>Hi all,
> >>>
> >>>Changes since 20160311:
> >>>
> >>>The vfs tree gained a conflict against Linus' tree. I also applied a
> >>>patch for a known runtime bug.
> >>>
> >>>The tip tree gained a conflict against the mips tree.
> >>>
> >>>The aio tree still had a build failure so I removed several commits
> >>>from it.  It also gained a conflict against the vfs tree.
> >>>
> >>>Non-merge commits (relative to Linus' tree): 11202
> >>>  8646 files changed, 426680 insertions(+), 211740 deletions(-)
> >>>
> >>To give people an idea what to expect in the merge window, here are my current
> >>build and runtime test results. Some of the runtime failures are due to the
> >>newly introduced i2c bug, but many (including the arm64 boot failures) have
> >>been around for a while.
> >>
> >[ ... ]
> >
> >>Qemu test results:
> >>	total: 96 pass: 69 fail: 27
> >>Failed tests:
> >[ ... ]
> >>	mips:mips_malta_smp_defconfig
> >I bisected this failure to commit bb11cff327e54 ("MIPS: Make smp CMP, CPS and MT
> >use the new generic IPI functions". Bisect log is attached.
> 
> Thanks for bisecting this. I tested this on a real Malta system but not
> qemu. I'll try to reproduce.
> 
I run the tests with only a single CPU core enabled. Maybe that causes
problems with your code ?

> Can I get qemu run script and the instructions to use it from somewhere?
> 
Clone https://github.com/groeck/linux-build-test.git.
Look in rootfs/*mips* for qemu scripts and root file systems.
The SMP tests all fail, so it should not matter which one you pick.
I use my own version of qemu, but for mips standard qemu 2.5.0 should
work fine (I don't have any mips specific changes in my version).

Hope this helps,
Guenter

> Thanks,
> Qais
> 
> >
> >>	mips64:smp:mips_malta64_defconfig
> >>	mips:mipsel_malta_smp_defconfig
> >>	mips:mipsel_malta64_smp_defconfig
> >If necessary I can repeat the bisect for those. Please let me know.
> >
> >Thanks,
> >Guenter
> >
> >---
> >Bisect log:
> >
> ># bad: [4342eec3c5a2402ca5de3d6e56f541fe1c5171e2] Add linux-next specific files for 20160314
> ># good: [f6cede5b49e822ebc41a099fe41ab4989f64e2cb] Linux 4.5-rc7
> >git bisect start 'HEAD' 'v4.5-rc7'
> ># good: [0525c3e26ec2c43cd509433be3be25210a0154ef] Merge remote-tracking branch 'drm-tegra/drm/tegra/for-next'
> >git bisect good 0525c3e26ec2c43cd509433be3be25210a0154ef
> ># bad: [385128a1b49762c1b9515c9f6294aeebbc55b956] Merge remote-tracking branch 'usb-chipidea-next/ci-for-usb-next'
> >git bisect bad 385128a1b49762c1b9515c9f6294aeebbc55b956
> ># good: [dfdb27baab4fc45c9399a991270413d0fb1c694a] Merge remote-tracking branch 'spi/for-next'
> >git bisect good dfdb27baab4fc45c9399a991270413d0fb1c694a
> ># bad: [e368d7d2a0dce6d6795ead1fc8a09bcca8a4a565] Merge branch 'timers/nohz'
> >git bisect bad e368d7d2a0dce6d6795ead1fc8a09bcca8a4a565
> ># good: [ced30bc9129777d715057d06fc8dbdfd3b81e94d] Merge tag 'perf-core-for-mingo-20160310' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
> >git bisect good ced30bc9129777d715057d06fc8dbdfd3b81e94d
> ># bad: [656a61d4d9cbb8dfc2d007281190b2eccebad522] manual merge of mm/pkeys
> >git bisect bad 656a61d4d9cbb8dfc2d007281190b2eccebad522
> ># good: [16f7379f2da43f29d9faa2f474745e2705a3f510] Merge branch 'efi/core'
> >git bisect good 16f7379f2da43f29d9faa2f474745e2705a3f510
> ># bad: [a7fb9a8169be9a55e0cfb98346aece1b51c016fa] Merge branch 'locking/core'
> >git bisect bad a7fb9a8169be9a55e0cfb98346aece1b51c016fa
> ># good: [2a07870511829977d02609dac6450017b0419ea9] irqchip/mips-gic: Use gic_vpes instead of NR_CPUS
> >git bisect good 2a07870511829977d02609dac6450017b0419ea9
> ># good: [eaff0e7003cca6c2748b67ead2d4b1a8ad858fc7] locking/pvqspinlock: Move lock stealing count tracking code into pv_queued_spin_steal_lock()
> >git bisect good eaff0e7003cca6c2748b67ead2d4b1a8ad858fc7
> ># good: [013e379a3094ff2898f8d33cfbff1573d471ee14] tools/lib/lockdep: Fix link creation warning
> >git bisect good 013e379a3094ff2898f8d33cfbff1573d471ee14
> ># bad: [7eb8c99db26cc6499bfb1eba72dffc4730570752] MIPS: Delete smp-gic.c
> >git bisect bad 7eb8c99db26cc6499bfb1eba72dffc4730570752
> ># good: [fbde2d7d8290d8c642d591a471356abda2446874] MIPS: Add generic SMP IPI support
> >git bisect good fbde2d7d8290d8c642d591a471356abda2446874
> ># bad: [bb11cff327e54179c13446c4022ed4ed7d4871c7] MIPS: Make smp CMP, CPS and MT use the new generic IPI functions
> >git bisect bad bb11cff327e54179c13446c4022ed4ed7d4871c7
> ># first bad commit: [bb11cff327e54179c13446c4022ed4ed7d4871c7] MIPS: Make smp CMP, CPS and MT use the new generic IPI functions
>