Date: Mon, 7 Jul 2014 11:59:03 -0700 From: hiren panchasara <hiren.panchasara@gmail.com> To: Adrian Chadd <adrian@freebsd.org> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org>, "freebsd-embedded@freebsd.org" <freebsd-embedded@freebsd.org>, Ian Lepore <ian@freebsd.org> Subject: Re: CAMBRIA and more than one atheros card Message-ID: <CALCpEUG1hCqHW8dKxSzPeaAJW5aevY_wHwWzoF%2Bfv9ypju-8wg@mail.gmail.com> In-Reply-To: <CAJ-VmokGC6-DHQP1V9exEq-VPW-oN972uYSbZQDuq4KiPb1SeA@mail.gmail.com> References: <20140707142538.GA43661@zibbi.meraka.csir.co.za> <CAJ-VmompzxOYXQ0_bmGsRHH7dGahEEGRsv-OqPMgAdB2NVOaaw@mail.gmail.com> <1404753166.65432.10.camel@revolution.hippie.lan> <CAJ-Vmo=zY%2B6J24s3Ux5LR7UVaQ3N5=eXHfAG-cOxXWbhJoHCGA@mail.gmail.com> <20140707182814.GA75629@zibbi.meraka.csir.co.za> <CAJ-VmokGC6-DHQP1V9exEq-VPW-oN972uYSbZQDuq4KiPb1SeA@mail.gmail.com>
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On Mon, Jul 7, 2014 at 11:31 AM, Adrian Chadd <adrian@freebsd.org> wrote: > On 7 July 2014 11:28, John Hay <jhay@meraka.org.za> wrote: >> On Mon, Jul 07, 2014 at 11:22:46AM -0700, Adrian Chadd wrote: >>> On 7 July 2014 10:12, Ian Lepore <ian@freebsd.org> wrote: >>> > On Mon, 2014-07-07 at 09:25 -0700, Adrian Chadd wrote: >>> >> hi, >>> >> >>> >> That call is returning ENOMEM. I'm not sure why. It allocated an mbuf >>> >> fine, but it couldn't allocate the DMA map. >>> >> >>> >> What's the output of "vmstat -z" ? I wonder if it's failing an allocation. >>> >> >>> >> >>> >> >>> >> -a >>> > >>> > Lack of bounce buffers is a posibility that won't show up in vmstat >>> > output. >>> >>> right, but there's a bunch of already failing vmstat entries. >>> >>> >>> John - there's a vmscale parameter somewhere. Hiren had to drop it >>> down for his APs to work in 64MB of RAM. I think it's >>> vm.kmem_size_scale . What's it say for you? >>> >> >> :~ # sysctl vm.kmem_size_scale >> vm.kmem_size_scale: 3 > > Ok. Search the archives for an email from Hiren titled "mbuf autotuning effect". > > TL;DR - set it to 1 and recompile. There's a kernel option somewhere > to do exactly that. Yes. http://lists.freebsd.org/pipermail/freebsd-mips/2013-September/003081.html I went through this for my tplink. John, can you show o/p of: sysctl -a | grep hw | grep mem and sysctl -a | grep maxmbuf Cheers, Hiren
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