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IRC log for #minetest-dev, 2017-12-13

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All times shown according to UTC.

Time Nick Message
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01:23 Megaf rubenwardy: I want to trace whats causing a memory leak when players join
01:23 Megaf will gdb help me with that?
01:23 rubenwardy no
01:23 rubenwardy valgrind will help you with actual memory leaks
01:24 rubenwardy but it won't tell you if it's correctly allocated stuff, say chunks
01:24 rubenwardy *mapblocks
01:24 rubenwardy only if it's an actual memory leak
01:24 Megaf without a single mod, and I mean 0 mods, not even player and hearts loaded, it still crashes
01:24 Megaf ERROR[Main]: ServerError: AsyncErr: ServerThread::run Lua: OOM error from mod '*builtin*' in callback on_joinplayer(): not enough memory
01:24 rubenwardy oh right
01:24 Megaf 2017-12-13 01:18:35: ERROR[Main]: Current Lua memory usage: 907 MB
01:24 rubenwardy that's a Lua issue
01:25 Megaf I'm using LuaJit
01:25 rubenwardy that's a lot of memory for no mods
01:25 rubenwardy you sure? :O
01:25 Megaf now, I want to know what to blame, LuaJIT, my compiler flags or a bug in minetest
01:25 rubenwardy that is to high a value for having no mods
01:25 Megaf rubenwardy: I did rm -rf * in the mods folder
01:25 rubenwardy I'd expect that with a lua mapgen
01:25 rubenwardy are you using MTG?
01:26 Megaf And that's what I said memory leak
01:28 Megaf rubenwardy: valgrind makes the thing run very slow
01:28 rubenwardy yup
01:28 rubenwardy that's to be expected
01:28 rubenwardy it's counting every single allocation you make
01:29 rubenwardy and every deallocation you make
01:30 rubenwardy that's probably an gross oversimplification
01:30 Megaf waiting for the server to get killed now
01:31 Megaf rubenwardy: memory use is fluctuating between 300 MB and 900 MB
01:31 * twoelk suspects murder
01:31 Megaf very interesting
01:31 rubenwardy lol
01:31 rubenwardy hmmm
01:32 Megaf Not sure kernel will OOM lua with that behaviour under valgrind
01:32 Megaf anyway. So far this is what I have http://paste.debian.net/plain/1000477
01:33 Megaf total        used        free      shared  buff/cache   available
01:33 Megaf Mem:           3938        1327         131         241        2479        2088
01:33 Megaf normal mem use in this system is 100 MB without minetestserver, it's my new dedicated
01:34 Megaf rubenwardy: memory fluctuation http://paste.debian.net/plain/1000478
01:36 Megaf will rebuild without luajit
01:36 Megaf after I manage to shut it down
01:37 Megaf ==24131== HEAP SUMMARY:
01:37 Megaf ==24131==     in use at exit: 1,735,842 bytes in 6,996 blocks
01:37 Megaf ==24131==   total heap usage: 132,091 allocs, 125,095 frees, 48,539,666 bytes allocated
01:37 Megaf ==24131==      possibly lost: 1,600 bytes in 5 blocks
01:37 Megaf ==24131== ERROR SUMMARY: 43886 errors from 18 contexts (suppressed: 0 from 0)
01:38 Megaf rubenwardy: any word before I recompile the server?
01:40 rubenwardy I doubt it's a compilation issue
01:40 Megaf I will use built in lua now
01:40 rubenwardy ah
01:40 rubenwardy there's  LuaJit GC64 or w/e
01:40 rubenwardy which allows a higher limit
01:40 rubenwardy but using 900MB with MTG is very suspicious
01:41 Megaf on my Linode VPS server actually manages to recover from the leak, as it only happens when people join
01:41 Megaf after that memory drops a lot,
01:42 Megaf Anyway, rebuilding using builtin luajit
01:42 Megaf it will just take a while because I rebuild lots of things
01:42 rubenwardy I don't see anything in MTG which could get anywhere close
01:42 Megaf rubenwardy: not even once I blamed minetest/subgame
01:42 rubenwardy could do print(dump()), and stream to a file
01:42 rubenwardy will be BIG
01:42 Megaf I'm just investigating
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01:44 Megaf That's quite interesting http://paste.debian.net/plain/1000480
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02:01 Megaf rubenwardy: memory leak persists with built in lua
02:02 Megaf let me try with a clean git clone from backport-0.4 subgame
02:03 Megaf persists
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02:08 Megaf rubenwardy: so, no mods at all = memory leak, built in lua = memory leak, standard clean MTG = memory leak
02:08 Megaf ideas?
02:09 rubenwardy nope
02:09 rubenwardy not enough info, and I can't reproduce
02:09 rubenwardy also, how are you measuring memory?
02:09 Megaf [01:34:43] <Megaf> rubenwardy: memory fluctuation http://paste.debian.net/plain/1000478
02:09 Megaf and watching htop
02:09 Megaf basically one of minetestserver threads keeps eating 100% of cpu
02:10 Megaf and the process eats up to 1.2 GB of RAM
02:10 Megaf before dropping to arround 300 MB and going up again in a loop
02:12 rubenwardy need to measure lua memory
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02:13 rubenwardy collectgarbage().count
02:13 rubenwardy collectgarbage().count()
02:13 Megaf running clearobjects now
02:13 Megaf then I will vacuum the db
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12:40 pipo hey folks, what going on on minetest server list? is that an attack for phishing passwords?
12:40 pipo a lot of servers got two entries in the list - many of them got a second entry like "minetest.fun:<port-no>" - many of them have the same user online!
12:41 Megaf sounds like a bug
12:42 Megaf http://servers.minetest.net/ looks good though
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13:04 Megaf maybe not a bug
13:06 pipo now they removed all  "minetest.fun:<port-no>"  ant we have  "minetest.gams:<port-no>" entries
13:06 pipo [14:02] <<pipo>> i still think someone tries to get user passwords by duplicating known servers with a differnt ip-adress:port
13:06 pipo [14:03] <<pipo>> if players type in thier password on one of the faked servers it will be sent to that wrong address
13:06 pipo [14:03] <<pipo>> on the new servers its only a hash, that is send ofc
13:07 pipo look, most of the "minetest.games:<port>" entries have the same users online and all are using the same mapgen
13:10 Megaf It is an attack, yes
13:11 pipo any way we could warn players NOT to sent thier passwords to the faked server addresses?
13:22 crazyR might be a safe option to shutdown the list untill they have all been filtered out
13:23 crazyR maybe its time to make server owners register there servers before they go on the list. so that phishing can be tracked
13:24 ThomasMonroe thats a good idea
13:25 crazyR @sfan5 whats your view on this
13:26 Megaf [13:23:50] <crazyR> maybe its time to make server owners register there servers before they go on the list. so that phishing can be tracked
13:26 pipo sfan5 is marked away
13:26 Megaf agreed
13:26 crazyR pipo i know but he will see this when he comes back.
13:27 pipo ok
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13:28 crazyR an even easier way would be to link minetest forum accounts to server urls..
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15:43 jas_ game#1977
15:43 ShadowBot https://github.com/minetest​/minetest_game/issues/1977 -- Update dirt footstep sounds by jastevenson303
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18:51 Wuzzy hey. does anyone think whether #4484 is important enough to be added to 0.5.0 milestone?
18:51 ShadowBot https://github.com/minetest/minetest/issues/4484 -- Player immortal while attached
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19:58 Fixer oh yes
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20:21 Krock Wuzzy, also the selection boxes seem to be on the wrong position when they're attached. will have to fix the position before that can be changed
20:21 Krock > working on it <
20:22 Wuzzy thx
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21:04 Topic for #minetest-dev is now Minetest core development and maintenance. Minetest 0.4.16 released! Chit-chat goes to #minetest. http://irc.minetest.net/minetest-dev/ http://dev.minetest.net/
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22:43 Fixer damn lighting after WE https://i.imgur.com/wqdS9z6.png
22:44 sfan5 /fixlight, i don't even know whether this qualifies as a minetest bug
22:54 Jordach isn't that the smooth lighting on mapblock bug?
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23:13 Fixer fixlight fixed it after second attempt, first one made it much worse
23:28 Fixer anyone knows, is this intended? https://i.imgur.com/SPeG9er.png
23:38 sofar sadly, I think it is
23:39 Fixer issued a bugreport
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