[zfs-discuss] Spectre and Meltdown impact on ZFS

Gordan Bobic gordan.bobic at gmail.com
Wed Jan 10 09:17:01 EST 2018


While I dislike systemd as much as anyone, I don't think you can reasonably
hold RH responsible for a hardware bug.

FWIW, it looks like the PCID backport just landed in 4.9.76 mainline today.
What release of what distros see the backports of it is open to conjecture.

On Wed, Jan 10, 2018 at 2:00 PM, Durval Menezes <durval.menezes at gmail.com>
wrote:

> Howdy,
>
> Stuart: thanks for the info.
>
> Gordan: RH is probably too busy trying to hold their systemd crap together
> (or worse, readying new&shiny&even worse crap to foist upon us) to worry
> about upgrading their currently supported enterprise-level flagship OS so
> we don't lose 20% or more of performance... ;-/
>
> Seriously, this Spectre/Meltdown SNAFU and Intel's/RH's response to it is
> the worst FUBAR I've seen in all those 20 years (actually more like 36)
> working in this vital industry... :-/
>
> Cheers,
> --
>    Durval.
>
>
> On Wed, Jan 10, 2018 at 5:13 AM, Gordan Bobic via zfs-discuss <
> zfs-discuss at list.zfsonlinux.org> wrote:
>
>> I don't recall reading anything about them backporting PCID support to
>> their 3.10.0 kernel.
>>
>> On 10 Jan 2018 01:07, "Stuart Anderson" <anderson at ligo.caltech.edu>
>> wrote:
>>
>>> Agreed. Do you happen to know if Red Hat has made any comments yet on
>>> if/when the stock RHEL kernel will provide PCID support?
>>>
>>> > On Jan 9, 2018, at 4:49 PM, Gordan Bobic via zfs-discuss <
>>> zfs-discuss at list.zfsonlinux.org> wrote:
>>> >
>>> > ISTR you need 4.14+ kernel to get the PCID support, which reduces the
>>> slowdown from the fixes substantially.
>>>
>>> --
>>> Stuart Anderson  anderson at ligo.caltech.edu
>>> http://www.ligo.caltech.edu/~anderson
>>>
>>>
>>>
>>>
>> _______________________________________________
>> zfs-discuss mailing list
>> zfs-discuss at list.zfsonlinux.org
>> http://list.zfsonlinux.org/cgi-bin/mailman/listinfo/zfs-discuss
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.zfsonlinux.org/pipermail/zfs-discuss/attachments/20180110/a9cc8baa/attachment-0001.html>


More information about the zfs-discuss mailing list