Hello Andrew,
On Fri, Sep 21, 2018 at 12:23:06AM +1200, Andrew Ruthven wrote:
> I decided to try the latest 4.9 kernel again tonight and I
> tracked down the performance issue I was seeing. iostat was
> showing one hard drive with utterly terribly wait times, and
> even running smartctl against that drive was epically slow
> (all other drives ran normally).
> Turns out there was a dodgy SATA cable for that drive. After
> swapping the cable, I/O on the machine is back to what it
> should be!
Glad it could be resolved!
> At a guess something has changed in the SATA drivers between
> 4.1.x and 4.9.y and that change of behaviour triggered the
> issue I was observing.
Yeah, sometimes even subtle changes in the kernel have
huge impact on certain (especially problematic) hardware.
Best,
Herbert
> Ben, thank you for publishing your kernels!
> Cheers,
> Andrew
> On Mon, 2018-02-05 at 21:47 +1300, Andrew Ruthven wrote:
>> Hey,
>> Has anyone noticed big I/O issues with this kernel?
>> I ran it for a few days, and found that processes (even on the main
>> system) were often sitting in a D state, seemingly blocked on I/O.
>> But
>> there didn't seem to be much I/O happening. Even ssh'ing in to any
>> vservers or physical host was incredibly slow.
>> Cheers,
>> Andrew
>> On Tue, 2018-01-30 at 22:50 +0000, Ben Green wrote:
>>> Hi all,
>>> I've just finished and uploaded Linux kernel 4.9.78 with patch
>>> vs2.3.9.6. They are installable directly from the psand.net
>>> repository, or via the metapackage:
>>> linux-image-vserver-4.9-beng
>>> For i386 and amd64 architectures, and there's a version I've
>>> compiled
>>> with gcc-8 which can be installed directly, or via the metapackage:
>>> linux-image-vserver-4.9-beng-reptoline
>>> That one is amd64 only of course. These images are only provided
>>> in
>>> the Debian Stretch distro repositories. Instruction (which need a
>>> bit
>>> of updating but should get you where you need to be) are at:
>>> https://www.psand.net/services/public-repository.html
>>> These kernels are minimally tested and as usual come with
>>> absolutely
>>> no guarantees whatsoever.
>>> Cheers,
>>> Ben
> --
> Andrew Ruthven, Wellington, New Zealand
> MIITP
> At work: andrew.ruthven@catalyst.net.nz
> At home: andrew@etc.gen.nz
> Cloud : https://catalystcloud.nz
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Received on Thu Sep 20 15:41:37 2018