svn commit: r270759 - in head/sys: cddl/compat/opensolaris/kern cddl/compat/opensolaris/sys cddl/contrib/opensolaris/uts/common/fs/zfs vm

[Alan Cox]

On 08/28/2014 16:15, Matthew D. Fuller wrote:
> On Thu, Aug 28, 2014 at 10:11:39PM +0100 I heard the voice of
> Steven Hartland, and lo! it spake thus:
>> Its very likely applicable to stable/9 although I've never used 9
>> myself, we jumped from 9 direct to 10.
> This is actually hitting two different issues from the two bugs:
>
> - 191510 is about "ARC isn't greedy enough" on huge-memory machines,
>   and from the osreldate that bug was filed on 9.2, so presumably is
>   applicable.
>
> - 187594 is about "ARC is too greedy" (probably mostly on not-so-huge
>   machines) and starves/drives the rest of the system into swap.  That
>   I believe came about as a result of some unrelated change in the
>   10.x stream that upset the previous balance between ARC and the rest
>   of the VM, so isn't a problem on 9.x.

10.0 had a bug in the page daemon that was fixed in 10-STABLE about
three months ago (r265945).  The ARC was not the only thing affected by
this bug.