** Attachment added: "Syslog"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1516547/+attachment/4520691/+files/syslog
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We've located the issue to be somewhere in the RAID rebuilding process.
Turning down the RAID rebuild speed with the command "echo 1 >
/proc/sys/dev/raid/speed_limit_max" will make the installation success
but this is only pushing the crash for later in the OS.
We've also noticed when installing
The issue persist when using kernel 4.3.0-040300-generic
** Tags added: kernel-bug-exists-upstream
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Title:
Ubuntu 15.10 crashes
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
Ubuntu 15.10 crashes with RAID-10
Status in linux
Kernel tested. This seems to be stable as the server has been running
for 24 hours now and the RAID has rebuild without crash.
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Kernel tested. Also seems to be stable.
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Title:
Ubuntu 15.10 crashes with RAID-10
Status in linux package in Ubuntu:
Confirmed
Kernel tested. Seems to be stable.
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Title:
Ubuntu 15.10 crashes with RAID-10
Status in linux package in Ubuntu:
Confirmed
Status
Kernel tested. Seems to be stable.
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Title:
Ubuntu 15.10 crashes with RAID-10
Status in linux package in Ubuntu:
Confirmed
Status
Kernel tested. Seems to be stable.
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Title:
Ubuntu 15.10 crashes with RAID-10
Status in linux package in Ubuntu:
Confirmed
Status
Kernel tested. Seems to be stable.
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Title:
Ubuntu 15.10 crashes with RAID-10
Status in linux package in Ubuntu:
Confirmed
Status
Our testings shows that all kernels from v4.2-rc1 to v4.2-rc5 has this
bug.
We can test downwards further but from which kernel should we continue?
v4.1-rc8-unstable?
While testing on different hardware we've experienced that this bug
doesn't seems to appear when having SSD disk only (uptime is
The issue seems to start from kernel 4.2 and up as we haven't been able
to reproduce the problem with kernel 4.1
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Title:
Ubuntu
** Attachment added: "dmesg"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1516547/+attachment/4524680/+files/dmesg
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We've tested kernel v4.2-rc5-unstable which exhibits the same bug. We're
now testing downwards through the rc kernels.
While testing v4.2-rc5-unstable we managed to get some logs from `dmesg`
just before the crash. See attachment.
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Hi Joseph.
Sorry for the late reply.
Ubuntu 16.04, which uses kernel 4.4, has been tested without facing
these errors and Ubuntu 15.10 is also end-of-life July 2016.
Therefore we've decided to stop our testings as it seems to be a much
deeper investigation.
Thank you for all the help.
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