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Date:      Fri, 2 Nov 2012 14:26:13 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Ian Lepore <freebsd@damnhippie.dyndns.org>
Cc:        svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org
Subject:   Re: svn commit: r242466 - head/sys/mips/mips
Message-ID:  <CAJ-Vmo==ZVJEDcT4apeo3-om-ZwpAcMYC4-50U0v5jAU8CPrpQ@mail.gmail.com>
In-Reply-To: <1351868970.1120.25.camel@revolution.hippie.lan>
References:  <201211020523.qA25N5No052084@svn.freebsd.org> <1351868970.1120.25.camel@revolution.hippie.lan>

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On 2 November 2012 08:09, Ian Lepore <freebsd@damnhippie.dyndns.org> wrote:

> Of course, it doesn't save anything if the system is using more than 128
> maps, did you check?  When I checked on an arm dreamplug system, there
> were roughly 1850 maps allocated by time it got to the login prompt
> (making that local cache of 500 maps completely useless).

I don't reach that during boot on my 16MB RAM APs. There just aren't
that many devices.

> The patches I posted in arch@ a while back addressed this problem by
> setting up an uma(9) pool for maps (and pools for busdma buffers).  The
> patches were designed to be easy to incorporate for both arm and mips
> busdma implementations.

My problem is memory overhead at boot time. :/



Adrian



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