linux-kernel - Re: [PATCH 4.6 00/96] 4.6.6-stable review

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Date:	Mon, 8 Aug 2016 22:03:39 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	shuah.kh@...sung.com, patches@...nelci.org, stable@...r.kernel.org,
	Paul Burton <paul.burton@...tec.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 4.6 00/96] 4.6.6-stable review

On 08/08/2016 12:10 PM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.6.6 release.
> There are 96 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 Wed Aug 10 18:02:27 UTC 2016.
> Anything received after that time might be too late.
>

Build results:
	total: 148 pass: 146 fail: 2
Failed builds:
	unicore32:defconfig
	unicore32:allnoconfig

Qemu test results:
	total: 107 pass: 103 fail: 4
Failed tests:
	mips:malta_defconfig:nosmp
	mips64:malta_defconfig:nosmp
	mipsel:malta_defconfig:nosmp
	mipsel64:malta_defconfig:nosmp

The unicore32 build error is still not fixed in mainline.

mips:

Building mips:malta_defconfig:nosmp ... failed
------------
Error log:
drivers/built-in.o: In function `gic_shared_irq_domain_map.isra.0':
irq-mips-gic.c:(.text+0x1d58): undefined reference to `smp_num_siblings'
irq-mips-gic.c:(.text+0x1d5c): undefined reference to `smp_num_siblings'
irq-mips-gic.c:(.text+0x1de0): undefined reference to `smp_num_siblings'
irq-mips-gic.c:(.text+0x1de8): undefined reference to `smp_num_siblings'

Only seen with non-SMP builds. Tricky one, required bisect.

# bad: [0353fa20cb40ea75a7e3b7293b533bde4fa013e9] Linux 4.6.6-rc1
# good: [bed4c611a3b80fae04d75b9f85fcaf174bac1b06] Linux 4.6.5
git bisect start 'HEAD' 'v4.6.5'
# good: [8d3b41c18cff2db7ccea71243b945a33610b8cb5] cgroup: remove redundant cleanup in css_create
git bisect good 8d3b41c18cff2db7ccea71243b945a33610b8cb583c9f9e994f5c963fc652a52befc120699dcc591
# good: [3a255979bc75ffcc263928045df4b5f46df8a8ca] sched/fair: Fix effective_load() to consistently use smoothed load
git bisect good 3a255979bc75ffcc263928045df4b5f46df8a8ca
# bad: [6eafb1f777de375b52c8a83d262da2885a28579a] posix_cpu_timer: Exit early when process has been reaped
git bisect bad 6eafb1f777de375b52c8a83d262da2885a28579a
# bad: [83c9f9e994f5c963fc652a52befc120699dcc591] irqchip/mips-gic: Map to VPs using HW VPNum
git bisect bad 83c9f9e994f5c963fc652a52befc120699dcc591
# good: [3a1e9944db1570f9b654b7a187f13898e5c59529] can: fix handling of unmodifiable configuration options fix
git bisect good 3a1e9944db1570f9b654b7a187f13898e5c59529
# good: [f06b9b8071ae6e383931795e2a459d6abc0bc7bd] RDS: fix rds_tcp_init() error path
git bisect good f06b9b8071ae6e383931795e2a459d6abc0bc7bd
# first bad commit: [83c9f9e994f5c963fc652a52befc120699dcc591] irqchip/mips-gic: Map to VPs using HW VPNum

Reverting 83c9f9e994f5c963fc652a52befc120699dcc591 fixes the problem.
Its description suggests that it fixes a real bug, though, so copying Paul for input.

Guenter