Re: kern/134011

From: Thomas Backman <serenity_at_exscape.org>
Date: Wed, 27 May 2009 14:39:33 +0200
>
> On May 27, 2009, at 09:31 AM, Kip Macy wrote:
>>
>> Can you try not setting the ARC?
>> I haven't had any problems on my comparably sized VMs.
>>
>> -Kip

(Sorry if the quoting got FUBAR.)
I tried this "once" more, with 1GB VM RAM, no ARC settings and a 4GB  
swap for dumps. (Apparently, when I had 640MB VM RAM, the dump created  
was ~1150 MB. I figured it couldn't exceed RAM size.)
Between the previous tests and this, I had loads of crashes (with  
640MB), even so bad that I couldn't boot because savecore would cause  
a panic. I increased VM RAM and set arc_max in the loader and it  
booted fine. Then, I tried (see below) with 1GB VM RAM and again no  
ARC settings.

The wired count grew and grew and grew, until it crashed in  
lzjb_decompress(), backtrace:
lzjb_decompress()
zio_decompress()
zio_done()
zio_execute()
zio_done()
zio_execute()
taskq_thread()
fork_exit()
fork_trampoline()

On "call doadump" I got "Fatal double fault", no dump, and a reboot.

Here's a LONG output of some vmstat output while running buildworld - 
j4. Note how the wired count keeps increasing and increasing until it  
breaks (in part, I guess this is intended, but it seems to grow a tad  
out of hand):

Regards,
Thomas

------ NO arc settings below! ------

[serenity_at_clone ~]$ while :; do date; echo; vmstat -s | grep -E 'pages  
(cached|active|wired down|free$)'; echo; sleep 20; done
Wed May 27 13:54:50 CEST 2009

     15716 pages cached
     41358 pages active
     63244 pages wired down
    141368 pages free

Wed May 27 13:55:10 CEST 2009

     15719 pages cached
     65571 pages active
     65515 pages wired down
    113358 pages free

Wed May 27 13:55:30 CEST 2009

     15719 pages cached
     41471 pages active
     70436 pages wired down
    132093 pages free

Wed May 27 13:55:50 CEST 2009

     15809 pages cached
     11660 pages active
     81518 pages wired down
    153294 pages free

Wed May 27 13:56:10 CEST 2009

     16124 pages cached
     11013 pages active
     87862 pages wired down
    147672 pages free

Wed May 27 13:56:30 CEST 2009

     16124 pages cached
     10917 pages active
     93383 pages wired down
    142488 pages free

Wed May 27 13:56:50 CEST 2009

     16144 pages cached
     10920 pages active
     98399 pages wired down
    137634 pages free

Wed May 27 13:57:11 CEST 2009

     16144 pages cached
      8810 pages active
     99766 pages wired down
    138416 pages free

Wed May 27 13:57:31 CEST 2009

     16871 pages cached
     10552 pages active
    101513 pages wired down
    134928 pages free

Wed May 27 13:57:51 CEST 2009

     16883 pages cached
     11496 pages active
    104379 pages wired down
    131244 pages free

Wed May 27 13:58:11 CEST 2009

     16883 pages cached
     12916 pages active
    106040 pages wired down
    128168 pages free

Wed May 27 13:58:31 CEST 2009

     16893 pages cached
     16027 pages active
    106888 pages wired down
    124227 pages free

Wed May 27 13:58:51 CEST 2009

     16896 pages cached
     13662 pages active
    107314 pages wired down
    126197 pages free

Wed May 27 13:59:11 CEST 2009

     16896 pages cached
     14783 pages active
    107870 pages wired down
    124567 pages free

Wed May 27 13:59:31 CEST 2009

     16896 pages cached
     14129 pages active
    108229 pages wired down
    124904 pages free

Wed May 27 13:59:51 CEST 2009

     16896 pages cached
     13691 pages active
    108613 pages wired down
    124973 pages free

Wed May 27 14:00:12 CEST 2009

     16908 pages cached
     21888 pages active
    109317 pages wired down
    116102 pages free

Wed May 27 14:00:32 CEST 2009

     16908 pages cached
     16624 pages active
    109980 pages wired down
    120739 pages free

Wed May 27 14:00:52 CEST 2009

     16908 pages cached
     15138 pages active
    110250 pages wired down
    121978 pages free

Wed May 27 14:01:12 CEST 2009

     17916 pages cached
     15184 pages active
    117746 pages wired down
    114193 pages free

Wed May 27 14:01:32 CEST 2009

     17916 pages cached
     15698 pages active
    118926 pages wired down
    112573 pages free

Wed May 27 14:01:52 CEST 2009

     17916 pages cached
     25922 pages active
    119319 pages wired down
    101966 pages free

Wed May 27 14:02:12 CEST 2009

     17916 pages cached
     20539 pages active
    120071 pages wired down
    106607 pages free

Wed May 27 14:02:32 CEST 2009

     17937 pages cached
     25740 pages active
    120564 pages wired down
    100913 pages free

Wed May 27 14:02:52 CEST 2009

     18074 pages cached
     25516 pages active
    121315 pages wired down
    100338 pages free

Wed May 27 14:03:12 CEST 2009

     18094 pages cached
     19031 pages active
    122122 pages wired down
    106028 pages free

Wed May 27 14:03:33 CEST 2009

     18103 pages cached
     23648 pages active
    122723 pages wired down
    100812 pages free

Wed May 27 14:03:53 CEST 2009

     18103 pages cached
     29860 pages active
    122962 pages wired down
     94362 pages free

Wed May 27 14:04:13 CEST 2009

     18217 pages cached
     38628 pages active
    123589 pages wired down
     84918 pages free

Wed May 27 14:04:33 CEST 2009

     18248 pages cached
     18009 pages active
    124198 pages wired down
    104942 pages free

Wed May 27 14:04:53 CEST 2009

     18483 pages cached
     19225 pages active
    125757 pages wired down
    102082 pages free

Wed May 27 14:05:13 CEST 2009

     18505 pages cached
     18979 pages active
    127236 pages wired down
    100840 pages free

Wed May 27 14:05:33 CEST 2009

     18505 pages cached
     19717 pages active
    127714 pages wired down
     99636 pages free

Wed May 27 14:05:53 CEST 2009

     18521 pages cached
     21331 pages active
    127996 pages wired down
     97737 pages free

Wed May 27 14:06:13 CEST 2009

     18543 pages cached
     23642 pages active
    128571 pages wired down
     94845 pages free

Wed May 27 14:06:33 CEST 2009

     18543 pages cached
     20029 pages active
    128781 pages wired down
     98252 pages free

Wed May 27 14:06:54 CEST 2009

     18603 pages cached
     18498 pages active
    129496 pages wired down
     99034 pages free

Wed May 27 14:07:14 CEST 2009

     18603 pages cached
     24398 pages active
    130137 pages wired down
     92504 pages free

Wed May 27 14:07:34 CEST 2009

     18603 pages cached
     21363 pages active
    130230 pages wired down
     95456 pages free

Wed May 27 14:07:54 CEST 2009

     18603 pages cached
     23774 pages active
    130705 pages wired down
     92540 pages free

Wed May 27 14:08:14 CEST 2009

     18765 pages cached
     21217 pages active
    131884 pages wired down
     93881 pages free

Wed May 27 14:08:34 CEST 2009

     19064 pages cached
     17613 pages active
    133762 pages wired down
     95531 pages free

Wed May 27 14:08:54 CEST 2009

     19098 pages cached
     15597 pages active
    135458 pages wired down
     95850 pages free

Wed May 27 14:09:14 CEST 2009

     19103 pages cached
     16082 pages active
    136499 pages wired down
     94357 pages free

Wed May 27 14:09:34 CEST 2009

     19107 pages cached
     15857 pages active
    137281 pages wired down
     93802 pages free

Wed May 27 14:09:55 CEST 2009

     19107 pages cached
     19354 pages active
    137997 pages wired down
     89561 pages free

Wed May 27 14:10:15 CEST 2009

     19136 pages cached
     21803 pages active
    138690 pages wired down
     86447 pages free

Wed May 27 14:10:35 CEST 2009

     19136 pages cached
     19315 pages active
    138979 pages wired down
     88638 pages free

Wed May 27 14:10:55 CEST 2009

     19136 pages cached
     18570 pages active
    139205 pages wired down
     89174 pages free

Wed May 27 14:11:15 CEST 2009

     19136 pages cached
     19063 pages active
    139547 pages wired down
     88260 pages free

Wed May 27 14:11:35 CEST 2009

     19136 pages cached
     26933 pages active
    140081 pages wired down
     79856 pages free

Wed May 27 14:11:55 CEST 2009

     19136 pages cached
     18519 pages active
    140270 pages wired down
     88076 pages free

Wed May 27 14:12:15 CEST 2009

     19136 pages cached
     21957 pages active
    140658 pages wired down
     84248 pages free

Wed May 27 14:12:35 CEST 2009

     19136 pages cached
     23497 pages active
    140910 pages wired down
     82457 pages free

Wed May 27 14:12:55 CEST 2009

     19815 pages cached
     19513 pages active
    144502 pages wired down
     82584 pages free

Wed May 27 14:13:16 CEST 2009

     19815 pages cached
     21738 pages active
    144881 pages wired down
     79980 pages free

Wed May 27 14:13:36 CEST 2009

     19815 pages cached
     24656 pages active
    145071 pages wired down
     76873 pages free

Wed May 27 14:13:56 CEST 2009

     19986 pages cached
     21395 pages active
    145581 pages wired down
     79589 pages free

Wed May 27 14:14:16 CEST 2009

     20022 pages cached
     22892 pages active
    146716 pages wired down
     76952 pages free

Wed May 27 14:14:36 CEST 2009

     20171 pages cached
     17546 pages active
    147771 pages wired down
     81149 pages free

Wed May 27 14:14:56 CEST 2009

     20171 pages cached
     17878 pages active
    150482 pages wired down
     78143 pages free

Wed May 27 14:15:16 CEST 2009

     20260 pages cached
     23596 pages active
    152448 pages wired down
     70429 pages free

Wed May 27 14:15:36 CEST 2009

     20332 pages cached
     21442 pages active
    153011 pages wired down
     72026 pages free

Wed May 27 14:15:56 CEST 2009

     20374 pages cached
     23005 pages active
    153651 pages wired down
     69810 pages free

Wed May 27 14:16:17 CEST 2009

     20374 pages cached
     20770 pages active
    154539 pages wired down
     71153 pages free

Wed May 27 14:16:37 CEST 2009

     20463 pages cached
     25142 pages active
    155789 pages wired down
     65500 pages free

Wed May 27 14:16:57 CEST 2009

     20477 pages cached
     32484 pages active
    156992 pages wired down
     56957 pages free

Wed May 27 14:17:17 CEST 2009

     20526 pages cached
     26033 pages active
    157863 pages wired down
     62507 pages free

Wed May 27 14:17:37 CEST 2009

     20867 pages cached
     20120 pages active
    158864 pages wired down
     67325 pages free

Wed May 27 14:17:57 CEST 2009

     20880 pages cached
     19925 pages active
    160153 pages wired down
     66229 pages free

Wed May 27 14:18:17 CEST 2009

     21075 pages cached
     27658 pages active
    162581 pages wired down
     56027 pages free

Wed May 27 14:18:37 CEST 2009

     21803 pages cached
     39186 pages active
    163758 pages wired down
     43310 pages free

Wed May 27 14:18:58 CEST 2009

     21810 pages cached
     32754 pages active
    163908 pages wired down
     49593 pages free

Wed May 27 14:19:18 CEST 2009

     21875 pages cached
     40620 pages active
    164575 pages wired down
     41036 pages free

Wed May 27 14:19:38 CEST 2009

     21895 pages cached
     43913 pages active
    165186 pages wired down
     37131 pages free

Wed May 27 14:19:58 CEST 2009

     21913 pages cached
     47805 pages active
    165486 pages wired down
     32943 pages free

Wed May 27 14:20:18 CEST 2009

     21916 pages cached
     80399 pages active
    140567 pages wired down
     23307 pages free

Wed May 27 14:20:38 CEST 2009

     21916 pages cached
     47934 pages active
    131067 pages wired down
     67480 pages free

Wed May 27 14:20:58 CEST 2009

     21916 pages cached
     48128 pages active
    131054 pages wired down
     67298 pages free

Wed May 27 14:21:18 CEST 2009

     21938 pages cached
     98297 pages active
    131522 pages wired down
     14753 pages free

Wed May 27 14:21:38 CEST 2009

     22570 pages cached
     17971 pages active
    124963 pages wired down
    102939 pages free

Wed May 27 14:21:58 CEST 2009

     22592 pages cached
     24054 pages active
    125193 pages wired down
     96565 pages free

Wed May 27 14:22:19 CEST 2009

     24154 pages cached
     26256 pages active
    125192 pages wired down
     93946 pages free

Wed May 27 14:22:39 CEST 2009

     24319 pages cached
     20557 pages active
    128251 pages wired down
     96539 pages free

Wed May 27 14:22:59 CEST 2009

     24493 pages cached
     31001 pages active
    129876 pages wired down
     84428 pages free

Wed May 27 14:23:19 CEST 2009

     24626 pages cached
     23256 pages active
    131449 pages wired down
     90535 pages free

Wed May 27 14:23:39 CEST 2009

     24676 pages cached
     44725 pages active
    132090 pages wired down
     68476 pages free

Wed May 27 14:23:59 CEST 2009

     24933 pages cached
     17247 pages active
    132609 pages wired down
     95307 pages free

Wed May 27 14:24:19 CEST 2009

     25180 pages cached
     19572 pages active
    133921 pages wired down
     91582 pages free

Wed May 27 14:24:39 CEST 2009

     25250 pages cached
     25916 pages active
    134800 pages wired down
     84329 pages free

Wed May 27 14:24:59 CEST 2009

     25346 pages cached
     23643 pages active
    135585 pages wired down
     85789 pages free

Wed May 27 14:25:19 CEST 2009

     25492 pages cached
     28457 pages active
    136531 pages wired down
     79961 pages free

Wed May 27 14:25:40 CEST 2009

     25492 pages cached
     46320 pages active
    137234 pages wired down
     61413 pages free

Wed May 27 14:26:00 CEST 2009

     25492 pages cached
     65175 pages active
    137752 pages wired down
     42052 pages free

Wed May 27 14:26:20 CEST 2009

     26698 pages cached
     26348 pages active
    139321 pages wired down
     78720 pages free

Wed May 27 14:26:40 CEST 2009

     26728 pages cached
     17654 pages active
    149770 pages wired down
     76992 pages free

Wed May 27 14:27:00 CEST 2009

     26728 pages cached
     19290 pages active
    151873 pages wired down
     73244 pages free

Wed May 27 14:27:20 CEST 2009

     26749 pages cached
     21063 pages active
    154681 pages wired down
     68635 pages free

Wed May 27 14:27:40 CEST 2009

     26750 pages cached
     20613 pages active
    157053 pages wired down
     66722 pages free

Wed May 27 14:28:00 CEST 2009

     26771 pages cached
     21762 pages active
    160131 pages wired down
     62504 pages free

Wed May 27 14:28:20 CEST 2009

     26777 pages cached
     21401 pages active
    165438 pages wired down
     57435 pages free

Wed May 27 14:28:41 CEST 2009

     26777 pages cached
     23093 pages active
    170737 pages wired down
     50589 pages free

******* CRASH *********

Sorry about the length.
Received on Wed May 27 2009 - 10:39:51 UTC

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