irclog2html for #elinux on 20030709

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06:28.01pmisfiti hate the FAT filesystem. too bad they didn't use the PHAT filesystem.
06:55.58Russphucking hosed attribute table?
06:59.00MonMothaRuss: something like that
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13:57.49chouimatmorning
13:58.37sjhilldude
13:58.50CosmicPenguinmorning people
14:02.53*** join/#elinux prpplague (~billybob@12.148.134.9)
14:03.02prpplaguehowdy all
14:03.31prpplaguehmmm, the one time i actually want to talk to sorphin and he's not here
14:03.37prpplaguelol
14:03.54chouimathey prpplague
14:04.00prpplaguechouimat: hey guy
14:04.17prpplaguechouimat: been trying to get some spocks beard down here in east texas
14:04.23prpplaguechouimat: next to impossible
14:05.03chouimatprpplague: hehe ... probably filled with dixie chick as "unamerican" music ;)
14:05.56chouimatprpplague: getting good music is impossible here ... must travel 150kkkkkkkkkkkkm
14:06.06chouimats/kkkkkkkkkkm/km
14:06.14prpplaguechouimat: yea, well the dixie chicks are like swear words down here
14:06.37prpplaguechouimat: i think walmart is the only place that carry them here
14:06.52chouimatprpplague: hehe ... my cat is currently enjoying my mother's house .... a lot of stair case
14:06.58prpplaguechouimat: the rest of the stores have pulled them from the shelves
14:07.42prpplaguechouimat: most of the honktonks in the area don't take request for them anymore
14:08.35prpplaguechouimat: you seen the animatrix?
14:08.40chouimatnope
14:22.33CosmicPenguincoffee!!!!
14:22.45prpplagueCosmicPenguin: you seen animatrix yet?
14:25.17CosmicPenguinNo, and I don't plan to
14:25.44prpplagueCosmicPenguin: oh well, you'll like animatrix
14:26.39prpplagueCosmicPenguin: its more akin to the heavy metal stuff
14:26.54CosmicPenguinOh - yeah, I like that stuff
14:37.07prpplagueCosmicPenguin: seen the new yopy 3700?
14:37.14CosmicPenguinno!
14:37.17CosmicPenguinURL?
14:37.19prpplagueCosmicPenguin: just reading about it on linuxdevices.com
14:37.28prpplagueCosmicPenguin: http://palmtops.about.com/cs/alternativepdas/fr/Yopy3700.htm
14:39.41chouimatsjhill: ;)
14:40.04prpplagueCosmicPenguin: jeeze look familair - http://www.simtec.co.uk/products/EB7500ATX/index.html
14:40.19chouimatprpplague: I'm currently looking at the zire71 or the tungstenc
14:40.39prpplaguechouimat: nice
14:42.38CosmicPenguinprpplague: if its anything like its ancestor, watch out
14:43.33chouimatprpplague: only 99pound
14:44.20CosmicPenguinprpplague: that Cirrus board looks like a damn Dorado
14:45.17CosmicPenguinprpplague: what are those black dongles across from the output ports near the ISA port?
14:46.37CosmicPenguinI want some of these: http://www.simtec.co.uk/products/EB110MOD/gallery.html
14:47.08kergothhey
14:47.26CosmicPenguinkergoth: morning
15:00.06CosmicPenguinWhy is it so hard to explain IP fragmentation to this guy?
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15:05.15sjhillCosmicPenguin: if you explained ip fragmentation to me, i'd probably get lost
15:29.57CosmicPenguinsjhill: this guy - he is sending very large packets across TCP - like 32k
15:30.22CosmicPenguinSo, on his sniffer, he sees 22 ethernet packets, and then a single TCP ack
15:30.27CosmicPenguinback the other way
15:36.33sjhilloh, he is an idiot then
15:37.05CosmicPenguinYeah, well, anyway....
15:37.33CosmicPenguinI'm trying to explain the phenonmon, but he is convinced that he is sending 22 MTU sized TCP packets
15:38.32CosmicPenguinThe real problem is that the 32k packet is tripping memory, so the stack tries to collapse the 22 SKBs into a single SKB, so we have a huge performance hit because we esentially copy 32k twice
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16:29.32sjhillahhh
16:29.39sjhillMt.Dew....nectar of the gods
16:30.36kergothtrue that.
16:52.20kergothhmm
16:52.49kergothanyone know if theres a doc around that talks about how irq handling works in arm, what with multiplexing and the like?
16:53.01kergothI've got someone who needs a better understanding, and I suck at teaching
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19:05.20Russkergoth: you mean in linux?
19:05.47kergothRuss: yeah, especially how things changed when rmk revamped the interrupt handling in 2.5
19:05.54kergothi know i read something somewhere, but cant recall where
19:06.51RussI haven't really looked at 2.5 much..
19:07.45*** join/#elinux MonMotha (~monmotha@dhcp024-208-204-102.indy.rr.com)
19:08.44kergothhey MonMotha
19:08.51MonMothahi
19:08.57MonMothafreenode's IPv6 died
19:09.31chouimathi MonMotha
19:10.14MonMothahello
19:11.30MonMothaah, IP fragmentation...fun
19:11.39MonMothagreat way to bring a linux router doing NAT to it's knees
19:11.56chouimatMonMotha: bsd too
19:13.16MonMothajust about anything
19:14.05MonMothaNAT will require defragmenting the packet in many cases (linux always defrags for example), running your connection tracking on it, then refragmenting it to cram it down the local pipe again, performing NAT on every new fragment
19:14.15MonMothathat's not exactly computationally cheap
19:14.35MonMothathen again, even routing without NAT causes problems on linux with large numbers of fragments
19:15.00MonMothaI think I may be defragging always anyway (as I'm still using ipt_state)
19:15.12MonMothalinux 2.2 had the ip_always_defrag option, which was useful
19:15.29MonMothanice thing about that behavior though is that you don't have to worry about fragments in your filter rules
19:15.50MonMothawhich are a pain in the ass as just about the only thing you can say about them is "this is a fragment with ip source foo and ip dest bar"
19:16.08chouimatMonMotha: I'm using freebsd 5.1 on my router
19:16.21MonMothacan't say much about the BSDs
19:16.28MonMothaall my routers are linux
19:16.45MonMothaI know how iptables works, how tc works, how iproute2 works, how to do vlans, bridges, etc
19:17.21chouimatMonMotha: I'm using bsd for all my router/vpn/firewall ...better memory management
19:17.58MonMothaah, mem management isn't a big deal on most routers I've found (though linux uses quite a bit of ram for each connection, on the order of 64k I think)
19:18.43chouimatMonMotha: the only problem is I can grow the ramdisk ...
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19:28.56kergothCosmicPenguin: nice
19:31.30prpplagueCosmicPenguin: your ass a little raw? lol
19:36.29CosmicPenguinprpplague: nope - we got a real deal
19:37.24chouimatCosmicPenguin: ?
19:38.20CosmicPenguinIts for my fraternity house... :)
19:42.05chouimatCosmicPenguin: ok
19:45.36CosmicPenguinkergoth: gotten a chance to play with bootmenu recently>
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19:46.44kergothnah, been real busy
19:51.27CosmicPenguinthats good
19:51.52CosmicPenguinI just got busy, so no more pro bono hacking for a while
19:52.07CosmicPenguinExcept I gotta make a stock ticker for HSX, or I'll never get any work done
20:17.27RussCosmicPenguin: get that 5%?
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20:33.45CosmicPenguinAnyone here have any experience with network servers that live in the kernel?
20:54.28chouimat|showerCosmicPenguin: nope
20:56.28CosmicPenguinHmmm... here's something interesting.....
20:58.19CosmicPenguinTCP uses its own values to set the size of an incoming buffer on a socket
20:58.42CosmicPenguinAs opposed to the standard socket default
20:59.12CosmicPenguinHowever, when you call setsockopt() on a TCP socket, it checks the value according to the standard bounds set by the socket, *not* the bounds set by TCP
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