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Date:   Thu, 14 Feb 2019 13:02:26 -0800
From:   Guenter Roeck <linux@roeck-us.net>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
        akpm@linux-foundation.org, shuah@kernel.org, patches@kernelci.org,
        ben.hutchings@codethink.co.uk, lkft-triage@lists.linaro.org,
        stable@vger.kernel.org
Subject: Re: [PATCH 4.20 00/50] 4.20.9-stable review
Message-ID: <20190214210226.GA23386@roeck-us.net>
References: <20190213183655.747168774@linuxfoundation.org>
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On Wed, Feb 13, 2019 at 07:38:05PM +0100, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.20.9 release.
> There are 50 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 Feb 15 18:36:30 UTC 2019.
> Anything received after that time might be too late.
> 

Build results:
	total: 159 pass: 159 fail: 0
Qemu test results:
	total: 343 pass: 330 fail: 13
Failed tests: 
	sh:rts7751r2dplus_defconfig:initrd 
	sh:rts7751r2dplus_defconfig:ata:rootfs 
	sh:rts7751r2dplus_defconfig:mmc:rootfs 
	sh:rts7751r2dplus_defconfig:usb:rootfs 
	sh:rts7751r2dplus_defconfig:usb-hub:rootfs 
	sh:rts7751r2dplus_defconfig:usb-ohci:rootfs 
	sh:rts7751r2dplus_defconfig:usb-ehci:rootfs 
	sh:rts7751r2dplus_defconfig:usb-xhci:rootfs 
	sh:rts7751r2dplus_defconfig:usb-uas-ehci:rootfs 
	sh:rts7751r2dplus_defconfig:usb-uas-xhci:rootfs 
	sh:rts7751r2dplus_defconfig:scsi[53C810]:rootfs 
	sh:rts7751r2dplus_defconfig:scsi[53C895A]:rootfs
	sh:rts7751r2dplus_defconfig:scsi[FUSION]:rootfs

This failure gave me a bit of trouble. It is similar to the failure observed
earlier with v4.4.y, but changing the C compiler version did not help (I
tried 8.2.0 and 5.5.0), and changing the qemu version did not help either.
Bisect points to commit 31e8a058e1f ("Revert "ext4: use ext4_write_inode()
when fsyncing w/o a journal") as the culprit. No idea why that would be
the case, but I repeated the bisect twice with the same results, and
reverting that revert indeed fixes the problem. This is weird since
one of the failing tests doesn't even mount a file system but boots
from initrd. Go figure. Bisect results are below.

Guenter

---
# bad: [f4a86d6d2a0bdead7cf98d552481367e6356ef28] Linux 4.20.9-rc1
# good: [0788acb1a3ed1589da1768ba64b1e5c76e8cb661] Linux 4.20.8
git bisect start 'HEAD' 'v4.20.8'
# good: [df6033ca3341635d8f529d6cdb6d37257df6f783] MIPS: OCTEON: don't set octeon_dma_bar_type if PCI is disabled
git bisect good df6033ca3341635d8f529d6cdb6d37257df6f783
# good: [da33f30a55d08758a63de90038344f956252ea8f] drm/rockchip: rgb: update SPDX license identifier
git bisect good da33f30a55d08758a63de90038344f956252ea8f
# good: [3ef454cd518997a8447080fb01743aaa4d4de8ae] xfrm: Make set-mark default behavior backward compatible
git bisect good 3ef454cd518997a8447080fb01743aaa4d4de8ae
# bad: [b442f17368f050887aae5d525b4dd0e146440f94] libceph: avoid KEEPALIVE_PENDING races in ceph_con_keepalive()
git bisect bad b442f17368f050887aae5d525b4dd0e146440f94
# bad: [31e8a058e1f9aa32254f64a9643853062141895a] Revert "ext4: use ext4_write_inode() when fsyncing w/o a journal"
git bisect bad 31e8a058e1f9aa32254f64a9643853062141895a
# good: [0bc4dd12c3196b01d2123f95bb1c949e5eebe483] drm/i915: Try to sanitize bogus DPLL state left over by broken SNB BIOSen
git bisect good 0bc4dd12c3196b01d2123f95bb1c949e5eebe483
# first bad commit: [31e8a058e1f9aa32254f64a9643853062141895a] Revert "ext4: use ext4_write_inode() when fsyncing w/o a journal"