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[SOLVED] KTorrent freeze
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sirdilznik
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Joined: 28 Apr 2005
Posts: 731

PostPosted: Sat Oct 21, 2006 5:32 am    Post subject: [SOLVED] KTorrent freeze Reply with quote

I'm getting a freeze with ktorrent that takes my whole system down with it :evil: I tried many things myself, then searched around on these forums(unsuccessfully) and google. I ran into a thread on (surprisingly enough) ktorrent forums and posted in it:

KTorrent Forums thread

There is detail about the problem in the thread (my posts are at the end), but the gist of it goes as follows. Ktorrent freezes after a seemingly random amount of time. When it does I get like 2 seconds to do anything before it freezes my system completely. The only thing I can do at that point is reboot. Tried many different versions (2.02, 2.03, and 2.1dev) with identical results each time.

I figured I'd post in these forums as well since Gentoo Forums are far more active (and generally far more helpful).


Last edited by sirdilznik on Mon Oct 23, 2006 3:18 pm; edited 1 time in total
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opentaka
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Joined: 18 Feb 2005
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PostPosted: Sat Oct 21, 2006 7:07 am    Post subject: Reply with quote

hi there.
I have read the thread you have pointed out, and I have a question.

"the whole system freezes"
Can you check whether its the KDE which is frozen, or X, or actually the whole system(kernel)
if you have magic key enabled in your kernel, you might want to check that works or not even with the frozen system.

if it's the kernel problem, I suspect a kernel panic there and I would upgrade the kernel or try with different configs.

cheers,
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sirdilznik
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PostPosted: Sat Oct 21, 2006 3:40 pm    Post subject: Reply with quote

It seems to take the whole system down. I can Ctrl+Alt+F1 out of X, but that's about it. I can't even login or run anything at that point. The only thing I can do is Ctrl+Alt+Del to reboot (sometimes even that doesn't work and I have to hit the Reset button). I'm going to try running ktorrent with gdb to see if it gives me any useful info. I've had this with 2 different kernel versions.
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sirdilznik
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PostPosted: Mon Oct 23, 2006 3:22 pm    Post subject: Reply with quote

The problem turned out the be Adaptive File Readahead in the kernel config. I disabled that feature and rebuilt the kernel. KTorrent has been running without a hitch for 12 hours straight.
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deoren
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PostPosted: Sun Jan 21, 2007 7:33 am    Post subject: Reply with quote

Ever since I upgraded ktorrent to 2.1_rc1 from 2.1_beta1 I've been experiencing out of memory issues.

Snippet:

Code:
oom-killer: gfp_mask=0x201d2, order=0
 [<c014ccef>] out_of_memory+0xb1/0xde
 [<c014e065>] __alloc_pages+0x2e3/0x308
 [<c014fe80>] __do_page_cache_readahead+0x100/0x179
 [<c015039a>] max_sane_readahead+0x2c/0x42
 [<c014a38a>] filemap_nopage+0x317/0x3e5
 [<c015ed03>] swap_info_get+0x53/0xa3
 [<c01579ff>] do_no_page+0x71/0x270
 [<c0157e97>] __handle_mm_fault+0x219/0x2c0
 [<c0114186>] do_page_fault+0x169/0x5b5
 [<c011401d>] do_page_fault+0x0/0x5b5
 [<c01039a5>] error_code+0x39/0x40
Mem-info:
DMA per-cpu:
cpu 0 hot: high 0, batch 1 used:0
cpu 0 cold: high 0, batch 1 used:0
cpu 1 hot: high 0, batch 1 used:0
cpu 1 cold: high 0, batch 1 used:0
DMA32 per-cpu: empty
Normal per-cpu:
cpu 0 hot: high 186, batch 31 used:125
cpu 0 cold: high 62, batch 15 used:14
cpu 1 hot: high 186, batch 31 used:148
cpu 1 cold: high 62, batch 15 used:10
HighMem per-cpu: empty
Free pages:        4756kB (0kB HighMem)
Active:53306 inactive:52702 dirty:0 writeback:0 unstable:0 free:1189 slab:2936 m
apped:730 pagetables:671
DMA free:2032kB min:88kB low:108kB high:132kB active:4980kB inactive:4900kB pres
ent:16384kB pages_scanned:11554 all_unreclaimable? yes
lowmem_reserve[]: 0 0 486 486
DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB page
s_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 486 486
Normal free:2724kB min:2776kB low:3468kB high:4164kB active:208244kB inactive:20
5908kB present:498560kB pages_scanned:619369 all_unreclaimable? yes
lowmem_reserve[]: 0 0 0 0
HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:
0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
DMA: 0*4kB 0*8kB 1*16kB 1*32kB 1*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB                                                              0*4096kB = 2032kB
DMA32: empty
Normal: 1*4kB 36*8kB 6*16kB 1*32kB 0*64kB 0*128kB 1*256kB 0*512kB 0*1024kB 1*204                                                             8kB 0*4096kB = 2724kB
HighMem: empty
Swap cache: add 526056, delete 525786, find 13716/16872, race 1+15
Free swap  = 0kB
Total swap = 1020088kB
Free swap:            0kB
128736 pages of RAM
0 pages of HIGHMEM
2197 reserved pages
20426 pages shared
270 pages swap cached
0 pages dirty
0 pages writeback
730 pages mapped
2936 pages slab
671 pages pagetables
Out of Memory: Kill process 8578 (ktorrent) score 35949 and children.
Out of memory: Killed process 8578 (ktorrent).


Anybody else have this problem or is this what you were referring to sirdilznik?

If so, where did you disable the readahead feature? Thanks.
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