Date: Thu, 28 Aug 2014 17:30:17 -0500 From: Alan Cox <alc@rice.edu> To: "Matthew D. Fuller" <fullermd@over-yonder.net>, Steven Hartland <smh@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Dmitry Morozovsky <marck@rinet.ru> Subject: Re: svn commit: r270759 - in head/sys: cddl/compat/opensolaris/kern cddl/compat/opensolaris/sys cddl/contrib/opensolaris/uts/common/fs/zfs vm Message-ID: <53FFAD79.7070106@rice.edu> In-Reply-To: <20140828211508.GK46031@over-yonder.net> References: <201408281950.s7SJo90I047213@svn.freebsd.org> <alpine.BSF.2.00.1408290055050.67367@woozle.rinet.ru> <899BF203A6C64F3D8C8902F371D9DA79@multiplay.co.uk> <20140828211508.GK46031@over-yonder.net>
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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.
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