Date: Wed, 27 May 2009 11:50:29 +0200 From: Thomas Backman <serenity@exscape.org> To: Kip Macy <kmacy@freebsd.org> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: kern/134011 Message-ID: <E399DA30-B8E6-45C0-9E94-B1F91BFE2D78@exscape.org> In-Reply-To: <3c1674c90905270031n5228f9bg4b6dcc8f15782760@mail.gmail.com> References: <m2my90hfs1.wl%randy@psg.com> <3c1674c90905262113x127ad54ex8672ce8cbbf7eb1c@mail.gmail.com> <m2zlczb1ad.wl%randy@psg.com> <3c1674c90905262203o66064f1m7797f1e0f8f370c2@mail.gmail.com> <2AB885E4-31C5-4271-87F7-BA3F562EE7B1@exscape.org> <3c1674c90905270031n5228f9bg4b6dcc8f15782760@mail.gmail.com>
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On May 27, 2009, at 09:31 AM, Kip Macy wrote:
>>
>> I ran into this crash (I think*) yesterday too, albeit in a (amd64)
>> VM with
>> 768MB RAM.
>> However, I had set arc_min="30M" and arc_max="100M" so I expected
>> it to
>> work, but
>> it crashed within 10-15 minutes of make -j4 buildworld. I changed
>> the values
>> to 5 and 30M,
>> and so far (~30 minutes) no crash. The sources were from late May
>> 21st,
>> currently building
>> rev. 192805 (since 192808 broke the build, at least on the
>> tinderbox).
>>
>> * "I think" because I went to check on it it the middle of the
>> night, saw a
>> page fault in kernel mode
>> or whatever, and figured "damnit... well, I'll suspend the VM, turn
>> the
>> laptop off and check in the morning".
>> I hit shutdown instead, so no backtrace or anything. D'oh!
>>
>
>
> Can you try not setting the ARC?
> I haven't had any problems on my comparably sized VMs.
>
> -Kip
OK, I tried it, since it crashed even with my low ARC settings. With
*no* ARC settings, I get this:
cc -O2 -pipe -I. -DIN_GCC -DHAVE_CONFIG_H -DPREFIX=\"/usr\" -I/usr/obj/
usr/src/gnu/usr.bin/cc/cc_tools/../cc_tools -I/usr/src/gnu/usr.bin/cc/
cc_tools/../cc_tools -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../
contrib/gcc -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcc/
config -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcclibs/
include -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcclibs/
libcpp/include -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/
gcclibs/libdecnumber -g -DGENERATOR_FILE -DHAVE_CONFIG_H -I/usr/obj/
usr/src/tmp/legacy/usr/include -c /usr/src/gnu/usr.bin/cc/
cc_tools/../../../../contrib/gcc/genattr.c
cc -O2 -pipe -I. -DIN_GCC -DHAVE_CONFIG_H -DPREFIX=\"/usr\" -I/usr/obj/
usr/src/gnu/usr.bin/cc/cc_tools/../cc_tools -I/usr/src/gnu/usr.bin/cc/
cc_tools/../cc_tools -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../
contrib/gcc -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcc/
config -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcclibs/
include -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcclibs/
libcpp/include -I/usr/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/
gcclibs/libdecnumber -g -DGENERATOR_FILE -DHAVE_CONFIG_H -I/usr/obj/
usr/src/tmp/legacy/usr/include -c /usr/src/gnu/usr.bin/cc/
cc_tools/../../../../contrib/gcc/genautomata.c
*** drop to debugger here ***
---------------
# while :; do date; vmstat -m | grep -E 'Type|solaris'; sysctl
kstat.zfs.misc.arcstats.size; sleep 10; done
[...]
Wed May 27 11:33:43 CEST 2009
Type InUse MemUse HighUse Requests Size(s)
solaris 44183 109686K - 9175781
16,32,64,128,256,512,1024,2048,4096
kstat.zfs.misc.arcstats.size: 159089184
Wed May 27 11:33:53 CEST 2009
Type InUse MemUse HighUse Requests Size(s)
solaris 37633 108437K - 9536555
16,32,64,128,256,512,1024,2048,4096
kstat.zfs.misc.arcstats.size: 158529024
Wed May 27 11:34:03 CEST 2009
Type InUse MemUse HighUse Requests Size(s)
solaris 42848 109370K - 9849348
16,32,64,128,256,512,1024,2048,4096
kstat.zfs.misc.arcstats.size: 159689152
Wed May 27 11:34:13 CEST 2009
Type InUse MemUse HighUse Requests Size(s)
solaris 39751 108868K - 10195297
16,32,64,128,256,512,1024,2048,4096
kstat.zfs.misc.arcstats.size: 162581952
*** drop to debugger here ***
Panic screenshots (I still couldn't get it to dump properly - 640MB
RAM, 768MB swap, but it complains about the swap being too small):
Panic: http://imgur.com/chKEx.png
Backtrace: http://imgur.com/iXUFF.png
It runs buildworld for about 2-5 minutes before this happens.
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