Date: Fri, 2 Nov 2012 14:28:56 -0700 From: Garrett Cooper <yanegomi@gmail.com> To: Adrian Chadd <adrian@freebsd.org> Cc: svn-src-head@freebsd.org, Ian Lepore <freebsd@damnhippie.dyndns.org>, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r242466 - head/sys/mips/mips Message-ID: <CAGH67wSDdmsJxP5UVGK_VZLGUSXU9ENJ84i04SKMku1frG-nKw@mail.gmail.com> In-Reply-To: <CAJ-Vmo==ZVJEDcT4apeo3-om-ZwpAcMYC4-50U0v5jAU8CPrpQ@mail.gmail.com> References: <201211020523.qA25N5No052084@svn.freebsd.org> <1351868970.1120.25.camel@revolution.hippie.lan> <CAJ-Vmo==ZVJEDcT4apeo3-om-ZwpAcMYC4-50U0v5jAU8CPrpQ@mail.gmail.com>
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On Fri, Nov 2, 2012 at 2:26 PM, Adrian Chadd <adrian@freebsd.org> wrote: > 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. :/ > Maybe this should be a compile time constant that one can specify in their KERNCONF? Cheers, -Garrett
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