/srv/irclogs.ubuntu.com/2007/01/31/#ubuntu-kernel.txt

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zulwhee..01:19
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kylemwoohoo. killed my email backlog.04:11
kylemnow i can go back to reading bugs.04:11
infinityOoo, can you do my email next?05:43
infinityI have unread mail from ~3 years ago.05:43
kylemdamn, chief.05:45
kylemi have this phobia of unread email05:45
infinityI fear it so much that I never read it, which may explain the above.05:47
kylemhaha.05:47
kylemso is launchpad ever going to stop having baltix as the default distribution?05:47
kylemit's really starting to annoy me. :)05:47
infinityIt's alphabetical.05:47
infinityWe've requested many times to get Ubuntu at the top of the list.05:47
infinitySort of like all the online shops with "USA, Argentina, Aruba..."05:48
infinityPerhaps just renaming the distro to Abuntu would be easier.05:48
kylemhaha.05:49
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MithrandirBenC: lrm ftbfs.10:00
MithrandirFATAL: modpost: GPL-incompatible module ath_hal.ko uses GPL-only symbol 'paravirt_ops'10:02
mjg59Winning.10:10
Mithrandiryou can't call udelay or ndelay if the kernel's built with paravirt..10:11
Mithrandirwinn0r.10:11
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Mithrandirthis only hits i386, for additional fun.10:20
mjg59Non-free modules can't call udelay if the kernel's built with paravirt?10:33
mjg59Superb.10:34
Mithrandirindeed.10:53
mjg59In that case, I think we lose.10:55
Mithrandirwe can make it work as long as you're not using paravirt, can't we?10:56
mjg59Is madwifi the only problem, or is that just where it bailed?10:56
Mithrandirunsure, I haven't tried the rest.10:56
mjg59I haven't looked at the implementation10:56
Mithrandirit has a #define which is used in the case where PARAVIRT isn't defined10:57
mjg59Ok, so paravirt_ops gets rewritten on boot if you're not running virtualised10:57
MithrandirI don't have any madwifi hardware to test, though10:57
mjg59So I /think/ we can get away without it10:58
mjg59Mithrandir: I guess the easiest way to test would just be to badger lrm to #undef CONFIG_PARAVIRT11:00
Mithrandiryeah, my thought too11:01
mjg59And see what explodes11:01
mjg59Mithrandir: Oh, mdelay is just a wrapper around udelay. So it'll be bitten too.11:08
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Mithrandirit blew up differently (slow_down_io being defined in both paravirt.h and io.h)11:36
Mithrandirhow bad would it be to not build madwifi?11:36
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mjg59Mithrandir: I think people would be unhappy11:38
mjg59Why is paravirt.h getting included?11:38
Mithrandirio.h includes it, amongst other things.  I could try disabling CONFIG_PARAVIRT across the board, though11:40
mjg59Ah, yeah, that was what I meant11:42
Mithrandirmmm, big hammer applied.12:08
=== Mithrandir does a full build of the package.
fabbioneMithrandir: hopefully it won't trash the ABI again12:09
Mithrandiruh, why would it?  It's lrm12:11
fabbioneoh ok12:12
cjwatsondevicescape is switchable on a per-driver basis, isn't it?12:24
cjwatsonif we merge it12:24
Mithrandiroh, fun, same problem with ltmodem12:27
MithrandirBenC: this needs to be solved ASAP after herd 3, I'm just kludging around it for now.12:27
mjg59cjwatson: Yes12:28
cjwatsonmjg59: do you know specifics of driver status with devicescape?12:29
cjwatsonlike, which ones are a significant improvement over ieee8021112:30
mjg59bcm43xx ought to be12:30
mjg59Well, frankly, all of them ought to be12:30
mjg59With the possible exception of zd1211rw12:30
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Mithrandiroh, and fglrx too.  Win12:36
cjwatsonBenC: did you merge the iSight and Apple Remote patches from mjg59? I don't see them in the changelog12:46
Mithrandir.. and nvidia.01:00
mjg59Mithrandir: Unsurprising01:01
Mithrandirmjg59: really annoying nevertheless.01:01
MithrandirI just hope this'll work.01:01
fabbioneMithrandir: i can test nvidia here if you want me to before upload01:04
fabbionejust hand me some -generic i386.deb01:04
MithrandirI just need to make it build first, but thanks.01:04
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BenCcjwatson: It's in my local tree only01:42
BenCcjwatson: you have a powerbook, right?01:42
BenCbecause I'm gonna need this tree tested with the new bcm43xx devicescape based driver01:42
mjg59The dscape bcm43xx driver needs different firmware to the softmac one01:43
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cjwatsonBenC: sure, given a binary01:45
BenCmjg59: Are you serious?01:45
cjwatsonmjg59: huh? as in, not fwcutter?01:45
mjg59fwcutter, but it needs version 4 firmware01:45
kylemBenC, yeah, v4 firmware.01:45
BenCso not different, just new enough01:46
cjwatsonhow do I tell if the stuff I have in /lib/firmware/ in v4?01:46
cjwatsons/in v4/is v4/01:46
mjg59softmac doesn't work with v4 firmware01:46
mjg59So01:46
MithrandirBenC: have you seen my rants in backlog about the paravirt_ops being marked as GPL-only?01:46
BenCMithrandir: Yeah01:46
Mithrandircan you lart upstream about it?01:47
Mithrandir(please)01:47
kylemuh, this should havebeen fixed.01:47
mjg59Mithrandir: I can't imagine that changing01:47
BenCparavirt_ops is being split into paravirt_ops and paravirt_module_ops01:48
BenCjust to fix this01:48
mjg59Oh, right01:48
mjg59That's handy01:48
kylemhttp://lwn.net/Articles/216636/01:48
Mithrandirthat'd make me happy, yes.01:49
MithrandirBenC: do you think just undef-ing it all over the lrm tree will allow the modules to work correctly (as long as you're not using paravirt) or will it just blow up?01:49
BenCMithrandir: no, that wont fix it01:49
BenCit'll fail at module load time01:50
Mithrandiris there a workaround which is quicker than "new kernel"?01:50
BenCnope :/01:50
Mithrandircan you give me a new kernel, like, now?01:50
BenClike "now", I have to take the kids to the bus stop...so give me 10 minutes01:51
Mithrandirok01:51
Mithrandirwith either paravirt disabled or that fix from Ingo or something. :-)01:51
Mithrandirthanks.01:51
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=== Mithrandir gently prods BenC
BenCMithrandir: ok, working on it now02:16
Mithrandirthanks.02:17
BenCI like Rusty's patch better02:18
=== kylem is worried neither of those got merged for 2.6.20...
BenCNope, they didn't02:23
kylemfuck.02:23
Mithrandircould we just back out the paravirt stuff for herd 3 and reintroduce it later?02:24
kylemah well, rusty's diff is pretty small.02:24
BenCMithrandir: Either way will take me the same amount of time02:26
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MithrandirBenC: ok02:26
BenCplus I made some loose guarantee's that it would be enabled for various testing purposes02:26
kylemlrm has the new madwifi, right?02:26
BenCit has 0.9.2.1...the "new" madwifi wouldn't compile02:26
BenCso no, it isn't fixed yet02:27
BenCbut I can do that post Herd 3 without a kernel upload02:27
kylemok.02:27
=== kylem was going through bugs.
cjwatsonBenC: Scott says Ian has already uploaded the udev pieces needed for driver-device-manager - are you aware of that?02:38
Keybukerr?02:39
Keybuksorry, I got confused02:39
Keybukit doesn't need the udev pieces anyway?02:39
cjwatsonBen thought it did02:39
KeybukI can categorically say that the udev pieces won't make it for feisty :p02:40
cjwatsonand I don't think it can meaningfully progress until drivers aren't bound by default, otherwise the UI ain't gonna do much02:40
Keybukbecause I have no intention of doing them until the *start* of a release process, given the big change02:40
cjwatsonthanks for telling us so early :-P02:40
Keybukthere appears to be some confusion :p02:41
cjwatsoncan you and Ben actually talk to each other about this please02:41
Keybukthe spec doesn't refer at all to the udev changes we've discussed02:42
cjwatson"The kernel currently has no mechanism to stop from binding a device to an already loaded driver. Upstream suggests unbinding after noticing this, and binding to the preferred driver. This is not ideal, and is the portion that is likely to require kernel changes."02:46
cjwatsonthe udev changes are the resolution of that02:46
Keybukright02:46
Keybukbut the sentence includes an "in the meantime"02:46
cjwatsonmy understanding from talking to Ben was that he had expected the udev change to be done, and was writing code based on that assumption02:47
Keybukthe udev change relies on a very experimental patch to integrate modprobe into udev02:47
BenCcjwatson: Had no idea02:47
Keybukas well as one of our own02:47
BenCcjwatson: is that udev in Herd3?02:47
KeybukI hadn't planned it for feisty at all, which is why there wasn't a spec for it02:47
BenCcjwatson: Because this may be a hell of a test round if it is in udev and enabled02:47
BenCMithrandir: In the interest of time, I'm uploading without a build-test, and building while the buildd's do02:48
BenCMithrandir: so if there's a build failure, I'll have a quick fix02:48
MithrandirBenC: cheers.02:48
BenCI don't forsee a problem though02:48
Mithrandirtell me when it's uploaded.02:48
cjwatsonBenC: no, it is not, as Keybuk says02:50
BenCok02:50
cjwatsonBenC: when I first came here Keybuk had confused driver-device-manager and udev-device-mapper02:50
cjwatsonBenC: but in any case, in Oslo you seemed to think that udev no-autobinding was going to land, and now apparently it isn't02:51
BenCcjwatson: No, I had no idea whether the udev parts would or not, since Ian taking over udev was even news to me :)02:51
BenCthe kernel part is done and will be in Herd 302:52
BenCMithrandir: fire in the hole02:52
MithrandirBenC: cheers02:53
KeybukIan isn't taking over udev?02:54
Keybukhe's taken over the bits that touch things like lvm, evms, etc.02:54
BenCKeybuk: Maybe we could use a "state of the udev address"02:55
BenCI've no idea what's going on with it02:55
Keybuknot much :)02:56
Keybukin theory, it just maintains itself now; unless we want to make changes to it02:56
Keybukit needs someone to keep up with the rules changes, etc.02:56
KeybukI'd figured it'd make the most sense to be under the kernel team, as it's tightly coupled to the kernel02:56
Keybukit needs a gentle hand, one who can say "no!" to any request for adding "/dev/mylittlepony"02:57
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zulhi02:57
kylemmorning.02:57
MithrandirKeybuk: what about /dev/ponies/woody ?02:57
zulhow is going kylem 02:57
kylemdude. mylittlepony is awesome.02:57
Keybukdefinitely no /dev/ponies02:57
kylemOMG PONIESS?!!?02:57
Keybukyou can have /dev/pony0, provided the kernel has a pony subsystem :p02:57
kylemzul, it's fucking cold. i want to go back to oslo.02:57
zulkylem: heh02:58
Mithrandirecho hay > /dev/ponies/woody02:58
zulkylem: it was colder last week02:58
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kylemsuck.02:58
zul-24 at one point02:59
BenCI got ENOENT on /dev/pony002:59
BenCI think the driver is busted02:59
kylemfile a bug.02:59
kylem:)02:59
BenCAssign it to Kurt I guess02:59
kylemhaha.03:00
=== kylem whacks L"Kyle" on his bugs mailbox and starts to make good on some promises from last night.
=== Mithrandir notes that the kernel is just too big
kylemoo is bigger i think03:01
MithrandirI don't run mdebdiff on that too often03:01
kylemmaybe you should. :P03:02
Mithrandiranyway, accepted03:02
=== Mithrandir goes to kick the publisher
BenCMithrandir: thanks03:03
cjwatsonBenC: please let me know how much extra work it will be in the d-d-m UI to account for udev not disabling auto-binding03:20
BenCcjwatson: will this feature not make it into feisty at all?03:21
BenCbecause not having the udev changes doesn't make it difficult, it makes it impossible03:21
BenCkills driver-backports too03:22
cjwatsonthe spec says "Upstream suggests unbinding after noticing this, and binding to the preferred driver03:22
cjwatson"03:22
cjwatsonis that definitely not a viable workaround?03:22
BenCcjwatson: Not safe..in the case of ide drivers, you cannot unload or unbind03:22
cjwatsonI don't think it would kill driver-backports, just limit its scope?03:22
BenCit would limit driver-backports to hot having updated drivers, just new ones03:23
BenCcjwatson: If the case of other drivers, binding, unbinding and rebinding to a new driver can have unexpected results that I'd rather not try to find out about03:23
BenCs/If/In/03:23
cjwatsoncan *anything* useful be done with d-d-m without that? like module options?03:34
KeybukI'm happy for Ben to take over implementation of the udev side03:35
mjg59Every module could be hacked and refuse to bind unless passed a magic option03:35
mjg59But, uh.03:35
KeybukI can forward him the modprobe patch which it can be built on03:35
cjwatsonthat seems sensible03:35
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cjwatsonBenC: driver-backports would work fine even without d-d-m for updated drivers, surely, as long as the backported driver were deterministically installed03:39
cjwatsonBenC: and as long as the backports package *isn't* installed on every system03:40
BenCcjwatson: Yeah, but deterministically means relying on undocumented ordering, or modprobe patching to prefer a subdir, which we can do03:40
cjwatsons/deterministically installed/deterministically used/03:40
cjwatsonmodprobe already prefers /updates03:40
cjwatsonwe can and should use that03:40
BenCis that on purpose or by accident? :)03:40
cjwatsonthat was done by SuSE for essentially the same purpose as we propose03:41
BenCah, then yeah, driver-backports is ok03:41
cjwatsonthere's enough code in there for it that it's clearly on purpose03:41
BenCd-d-m is likely to just do module ops and create modrobe.d files03:41
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cjwatsonsorry, RH, not SuSE03:41
BenCs/ops/params/03:42
cjwatsonchangelog says03:42
cjwatsono depmod: updates/ dir overrides (for RH, thanks to Thomas Vander Stichele)03:42
cjwatsonBenC: can we move forward with driver-backports with that approach RSN then?03:42
cjwatsonI'd like you to get your other items out of the way before sinking lots of time into udev changes which may turn out to be too risky to land03:43
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cjwatsonBenC: same for ubiquity-driver-updates03:44
cjwatsonBenC: I think at this point it is probably safest to accept that driver-device-manager needs to be feisty+1 and do the other work without reference to it, then have d-d-m ready to land first thing in feisty+103:45
BenCcjwatson: Makes sense to me03:49
BenCd-d-m is only slightly useful without the udev parts03:49
cjwatsonBenC: do you think those two can make FF (with Kyle's help if necessary)?03:50
cjwatsonthey're both important so can slip a bit if need be, but I'd rather they could land03:51
cjwatson(as I said, the vendor process doesn't need to be there for FF)03:51
BenCdriver-backports just needs an upload03:51
cjwatsonok03:51
BenCubiquity can be done pretty easily from my side, if you are doing the ubiquity parts03:51
cjwatsonthere are no ubiquity parts03:52
cjwatsonthe spec is misnamed because it assumed the implementation before we worked out how it would work03:52
BenCah, right, ok, then even less work :)03:52
cjwatsonactually, no, sorry, that's not true03:52
BenCI thought we passed an option so the initramfs asked for the drivers or something03:52
cjwatsonthere are some things that need to be done by ubiquity, but actually they'll probably be done by casper hooks03:52
BenCubiquity needs to make sure it copies them over03:53
cjwatsonright, that will be a casper hook03:53
BenCok03:53
cjwatsonbut same difference I guess03:53
BenCI can have all that done before Herd 403:53
cjwatsonit is not entirely clear that I will have time to do the casper work, but I'll work that out and delegate if need be03:53
BenCok03:53
mdzBenC,cjwatson: should we talk this out by phone?03:54
cjwatsonmaybe, but perhaps not right now03:56
BenCyeah, maybe reread the spec and make sure I got everything right03:57
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MithrandirBenC: ftbfs, due to missing ABI thang.04:10
BenCdoh04:16
Mithrandircare to fix?04:16
BenCMithrandir: fixed and uploaded04:20
Mithrandirthanks04:21
BenCnp04:21
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MithrandirBenC: uh, how does that fix it?04:29
Mithrandiror does the ABI checker read the changelog?04:29
BenCit reads the changelog04:31
Mithrandirok04:31
Mithrandiraccepted04:31
MithrandirBenC: http://librarian.launchpad.net/6012650/buildlog_ubuntu-feisty-i386.linux-source-2.6.20_2.6.20-6.10_FAILEDTOBUILD.txt.gz ; ftbfs05:29
BenCyeah, looks like the best thing is just to make paravirt_ops no a GPL export for this upload05:30
BenCtake out the patch, doing that now05:30
Mithrandirthanks05:30
mjg59BenC: Uhm.05:30
mjg59BenC: Is that a change that's been made upstream?05:30
BenCmjg59: No, but it's temporary05:31
mjg59If not, I think we're in murky legal waters.05:31
kylemnot really. the tenuous nature is if a vendor ships a patch which changes an export, they're acknowledging it's a derived work.05:31
BenCit used to be just EXPORT_SYMBOL, so I could claim that at one point it wasn't _GPL only :)05:32
mjg59While clearly the GPL allows us to change the symbol name, it implies that the modules we ship are derived works05:32
mjg59Well, implies more strongly than would otherwise be the case05:32
kylemheh, i found it hard to believe a court would rule that some other companies code is a derived work because an unrelated linux distro changed an export.05:33
BenCthe case could be made that changing a config option should make the same source bind differently to the GPL or not05:33
mjg59kylem: The work is the combination of the other company's code and the GPLed kernel code05:33
BenCshoudn't05:33
kylemthe legal onus isn't on us...05:33
mjg59kylem: When we're shipping the work, it is05:33
mjg59module+EXPORT_SYMBOL_GPL = GPL (in theory)05:34
mjg59If we can't provide the source, we're not permitted to distribute the work05:34
BenCa) The symbol recently changed, so one could easily claim we are using the old version, b) it's temporary, and c) I don't think we are functionally different than with the paravirt-mod-op patch05:34
kylemthat's not really the case since there's no precedent.05:34
mjg59BenC: I understand that there's a reasonable technical argument05:34
mjg59But I'm unhappy about setting a precedent where we'll s/_GPL// in order to get non-free drivers linking05:35
BenCmjg59: But I do understand your argument05:35
mjg59Even if it is temporary05:35
kylemi'm moderately amused they were allowed to change it by linus. i guess since paravirt being EXPORT_SYMBOL() never made it into a real kernel release...05:35
mjg59Given the alternatives, I think it would make more sense to just disable paravirt for this herd release05:36
kylemif my laptop wasn't utterly unusuable atm because i'm pruning and repacking ten gig of git trees, i'd try to argue more, but given it's utterly noninteractive.05:36
mjg59That way we're unarguably in the clear05:36
kylemer.05:36
kylemBenC, that's an easy fix to make.05:36
mjg59And we can fix it in time for the next upload05:36
kylemoh. you didn't push.05:37
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BenCurg05:45
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BenCI don't want to disable paravirt05:45
zulhttp://ozlabs.org/~rusty/paravirt/?cs=cac1791e2d5f05:47
=== kylem hits chuck.
kylemlook at the timestamp.05:49
zulmeh...ill g o back to work then :P05:49
kylemhttp://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=0dbe5a111382fd1320ff4b1d889e5b8c41290619;hp=a517b9f9fe8e57437b0b9b50e279220aaf65126805:50
Mithrandirkylem: since clearly, one sha1 hash in the url isn't enough. :-P05:51
kylemmeh.05:51
lifelessyknow, linus is clcearly right. thts so much simpler than 'http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1023;hp=102505:53
kylemi rightclick, and i hit "open link" what's so hard about that?05:53
BenCMithrandir: uploaded05:54
lifelessdidn't say 'hard' ;). said simple.05:54
=== kylem notes lifeless must be a masochist who writes out links by hand.
kylem:)05:54
BenCaccording to that commit, it sounds like the intention of _GPL is just to keep it local until the API settles05:55
MithrandirBenC: let's hope it builds fine this time around.06:08
mjg59BenC: Ok, I'll go with that06:09
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zulmeh..07:42
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psusiwhat is the internal buffer size used for pipes?  I seem to remember hearing it was only 4k on lkml at some point...08:44
Mithrandirbuilding looks good so far.  I'm hoping it'll be good.09:07
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siouxhi10:15
siouxwhat's this story about multimedia kernel?10:16
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TheMusosioux: There is a low latency kernel for Feisty, but afaik it isn't officially supported.10:21
Mithrandirit's in universe, yes10:22
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BenCMithrandir: Have you tried pushing LRM for i386 back through?11:13
Mithrandirno, since the i386 kernel isn't published yet11:18
MithrandirBenC: the ABI should have been stable between all those builds, right?11:33
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kylemdoubtful given he was mucking with exported symbols...11:52
Mithrandirwell, that should only have affected i386.11:53
MithrandirLet's hope that's true.11:53
kylemheh.11:56
kylemindeed.11:56

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