Date: Tue, 8 Jun 2010 04:10:35 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Yoshiaki Kasahara <kasahara@nc.kyushu-u.ac.jp> Cc: pjd@freebsd.org, freebsd-stable@freebsd.org Subject: Re: Freebsd 8.0 kmem map too small Message-ID: <20100608111035.GA3014@icarus.home.lan> In-Reply-To: <20100608.192645.266793829033956713.kasahara@nc.kyushu-u.ac.jp> References: <4BE82C5D.1080806@bit0.com> <20100608.181146.1224841629154014733.kasahara@nc.kyushu-u.ac.jp> <20100608095444.GA86953@icarus.home.lan> <20100608.192645.266793829033956713.kasahara@nc.kyushu-u.ac.jp>
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On Tue, Jun 08, 2010 at 07:26:45PM +0900, Yoshiaki Kasahara wrote: > On Tue, 8 Jun 2010 02:54:44 -0700, > Jeremy Chadwick <freebsd@jdc.parodius.com> said: > > > I realise you're talking about amd64, but I'm not sure how UMA is > > getting enabled on i386 to begin with. It does look like it's enabled > > on amd64 by default. > > I believe that this thread had been started before this tunable was > introduced on May 24th. Before that, ZIO_USE_UMA was used to control > the use of UMA, and it was enabled unconditionally in > /usr/src/sys/modules/zfs. Yoshiaki, thanks for the tip. I didn't check CVS commit logs to see when this tunable was introduced. It appears that the systems I'm looking at don't have the use_uma tunable because the kernel was built from RELENG_8 code dated May 23rd. This would also explain why Pete sees the tunable and I don't. Wish this stuff was documented somewhere. :-) -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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