Bug#885166: instability with 4.14 regarding KVM virtualization
Hi,
after in total nine weeks of bisecting, broken filesystems, service
outages (thankfully on unportant systems), 4.15 seems to have fixed the
issue. After going to 4.15, the crashes never happened again.
They have, however, happened with each and every 4.14 release I tried,
which I stopped doing with 4.14.15 on Jan 28.
This means, for me, that the issue is fixed and that I have just wasted
nine weeks of time.
For Debian, this means that there is a crippling, data-eating issue in
the current long-term releae kernel. I do sincerely hope that I never
have to lay my eye on any 4.14 kernel again and hope that no major
distribution will release with this version.
Greetings
Marc
On Mon, Jan 08, 2018 at 09:53:14AM +0100, Marc Haber wrote:
> On Mon, Dec 25, 2017 at 10:02:48PM +0000, Ben Hutchings wrote:
> > Given that commit fb1522e099f0 was merged after -rc7 I assume it's an
> > important fix, though the commit message doesn't spell that out. So I
> > think that whenever bisect asks you to test a version that doesn't
> > contain it, you should cherry-pick it first to avoid the other bug.
>
> After two more weeks, I can now confirm that cherry-picking fb1522e099f0
> onto earlier 4.13-rc kernels makes things _WORSE_.
>
> I believe that
> - plain 4.13-rc4 works fine and allows stable usage of KVM
> virtualization
> - 4.13-rc4 with cherry-picked fb1522e099f0 is bad, causing random
> segfaults and file-system corruption in VMs under disk and CPU load
> - 4.13-rc5 is bad either way
>
> I will start bisecting between 4.13-rc4 and 4.13-rc5, hoping that this
> will yield better results. Since I have to wait between three to five
> days to flag a kernel as "good" without too much doubt, and bisect
> 4.13-rc4..4.13-rc5 will take "roughly 7 steps".
>
> I am open to additional suggestions.
>
> Greetings
> Marc
>
>
> --
> -----------------------------------------------------------------------------
> Marc Haber | "I don't trust Computers. They | Mailadresse im Header
> Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402
> Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600421
>
--
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Marc Haber | "I don't trust Computers. They | Mailadresse im Header
Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402
Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600421
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