ZFS (ARC) performance regression in r321610

[Yamagi Burmeister]

On Mon, 27 Aug 2018 17:19:10 +0300
Lev Serebryakov <lev at FreeBSD.org> wrote:

> On 27.08.2018 16:47, Yamagi Burmeister wrote:
> 
> > With this program I was able to bisect the source and identify commit
> > r321610 (MFV r318946: 8021 ARC buf data scatter-ization) as the culprit:
> > https://svnweb.freebsd.org/base?view=revision&revision=321610
>  You could try to set "zfs_abd_scatter_enabled = 0" via kgdb and repeat
> tests to be sure, that this code is a problem.

With my testcase this looks very, very good. I'll give it a try in
production and report back. That'll take at least 12 hours to be sure
that it really works.

-- 
Homepage: https://www.yamagi.org
Github:   https://github.com/yamagi
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