OpenZFS: kldload zfs.ko freezes on i386 4GB memory

[Cy Schubert]

In message <E1kWvLj-0000GY-Ic.qroxana-mail-ru at smtp29.i.mail.ru>, qroxana 
writes
:
> 
> Hi,
>
> I have an old i386 machine running r364479. After upgrading to
> r367045, running kldload zfs.ko freezes the whole system.
>
> I also tried to replace the 4GB memory with another 2GB one
> and kldload zfs.ko works without freezing the machine.

ZFS ARC stresses memory. I've found a number of bad RAM chips over the 
years using ZFS.

The OpenZFS upgrade significantly changed how it manages ARC. It's likely 
that prior to the OpenZFS upgrade your memory wasn't stressed to the point 
of failure. You can try to mask the problem by reducing your RAM clock rate 
or or increase one of the other latency settings in your BIOS. However, 
again, this only masks an already weak RAM chip.

Like everything, RAM does age over its lifetime.


-- 
Cheers,
Cy Schubert <Cy.Schubert at cschubert.com>
FreeBSD UNIX:  <cy at FreeBSD.org>   Web:  https://FreeBSD.org
NTP:           <cy at nwtime.org>    Web:  https://nwtime.org

	The need of the many outweighs the greed of the few.