panic: kmem_malloc kmem_map too small

[CatMan]

hello,
My frenas server has been running well lately although it has slowed down more recently.
Specs: It was originally a game server so it should be speced up well
Freenas beta 8.2 using zfs
msi 790fx main board
8gb ddr3
AMD x4 cpu 3.2ghz
pool 1 3x wd 1.5tb
pool 2 2x samsung 2tb


it ran fine for a few days then upon some large copying from my desktop to the server:
panic: kmem_malloc(131072): kmem_map too small: 14659
09248 total allocated
cpuid = 0
uptime: 2d10h34m49s

ANy help is greatly appreciated

 

[Bever]

Are you using the 64bit version? You can tweak kmem settings, but I found out that just using x64 instead of i386 solved all kernel panics :)

 

[CatMan]

Are you using the 64bit version? You can tweak kmem settings, but I found out that just using x64 instead of i386 solved all kernel panics :)

Yes I believe I made sure to get the x64 iso.
Build FreeNAS-8.2.0-BETA2-x64 (r10638)

 

[Bever]

http://forums.freenas.org/showthrea...Error-FreeNAS-basically-stopped-working-after

 

[CatMan]

thanks both,
on a machine with 8gb ddr3, what values should I set for
vm.kmem_size=
vm.kmem_size_max=

thanks!

 

[ProtoSD]

I took me some convincing at first, but with the 64bit version of FreeNAS you don't need to set those.

If you're using 8.2 Beta-3, you can use the new Autotune feature (which isn't perfect either).

Here are the docs:

http://doc.freenas.org/index.php/Settings#Autotune

 

[survive]

Hi CatMan,

First thing I would do is memtest the box. Grab a copy from here:

http://memtest.org/#downiso

It takes a while to chew through 8GB of memory so let it run overnight....if you wake up to a half dozen passes completed without errors you are in fine shape.

-Will

 

[CatMan]

I took me some convincing at first, but with the 64bit version of FreeNAS you don't need to set those.

If you're using 8.2 Beta-3, you can use the new Autotune feature (which isn't perfect either).

Here are the docs:

http://doc.freenas.org/index.php/Settings#Autotune

Thanks I will try the autotune.
I am running 8.2 beta 2

Hi CatMan,

First thing I would do is memtest the box. Grab a copy from here:

http://memtest.org/#downiso


yeah I memtested the box before I installed freenas. All came up fine,
I think its due to the tuning on the b

It takes a while to chew through 8GB of memory so let it run overnight....if you wake up to a half dozen passes completed without errors you are in fine shape.

-Will

Thanks, I ran memtest right before I installed freenas, luckily no errors.
so using ZFS with a more then cabable cpu and the 8gb of ram, what would be the best settings for the varibles?
I did read up on them but most people had around 2-4gb and were using the x86 version

under tunables this is what I have now:

kern.ipc.nmbclusters
vfs.zfs.arc_max
vfs.zfs.vdev.cache.size
vm.kmem_size
vm.kmem_size_max

Edit: tested autotune, and so far its *slightly* helping, transfers went from 2KBs to 50KBs.
also checked the "ifconfig -a | grep media" and it reported a 1000 connect with full duplexing.
the switch and router are gigbait and so are the ports on my desktop and server(freenas)
now the desktop and server are both connect to a gigabit switch, and that switch connects them both to the router,
is there a way I can make sure that the traffic is only going through the switch? (it doesn't need to go all the way ou to the router.)

 

[survive]

Hi CatMan,

Any chance you have 4K (Advanced Format) drives & didn't check the "Force 4k" option when you created the pools?

What kind of results do you get if you ssh in & "dd" out a file (try "dd if=/dev/zero of=/mnt/zpool0/tmp.000 bs=2048k count=10k" - adjust "count" to control output size)?

As long as the filer & clients are in the same network (subnet) the traffic should only go through the switch. FreeNAS includes a copy of "iperf" which you can use to test your network throughput...you might want to give that a shot to help eliminate the network as the cause of the problem. Here's a guide detailing how to use it:

http://openmaniak.com/iperf.php

-Will

 

[CatMan]

Hi CatMan,

Any chance you have 4K (Advanced Format) drives & didn't check the "Force 4k" option when you created the pools?

What kind of results do you get if you ssh in & "dd" out a file (try "dd if=/dev/zero of=/mnt/zpool0/tmp.000 bs=2048k count=10k" - adjust "count" to control output size)?

As long as the filer & clients are in the same network (subnet) the traffic should only go through the switch. FreeNAS includes a copy of "iperf" which you can use to test your network throughput...you might want to give that a shot to help eliminate the network as the cause of the problem. Here's a guide detailing how to use it:

http://openmaniak.com/iperf.php

-Will

Thank you once again for helping me with this!

I hope I have performed this correctly, but there is no /mnt/zpool0/ on my machine so I changed this to a dataset I did have.
I tried your command:
[Raze@BlackServerStorage] /> dd if=/dev/zero of=/mnt/DATABASE_WD/Public/tmp.000 bs=2048k count=10k
10240+0 records in
10240+0 records out
21474836480 bytes transferred in 51.859578 secs (414095859 bytes/sec)
and it created a 20gb file in that directory


I don't remember what I checked for 4k sectors, I know that all the drives are advanced format drives, so i MAY have selected it but I remember reading in the FAQ or somewhere that it doesn't matter and if freenas detects the advanced format drives it will align them correctly (using 4k I would assume?)

 

[survive]

Hi CatMan,

That's almost 395MB/s.....so I don't think your disks are the problem!

What kind of numbers do you get running iperf between the filer & a client? Seems like we need to be looking at your network for the problem. Any chance you have a dodgy network cable connecting the FreeNAS box?

-Will

 

[CatMan]

Hi CatMan,

That's almost 395MB/s.....so I don't think your disks are the problem!

What kind of numbers do you get running iperf between the filer & a client? Seems like we need to be looking at your network for the problem. Any chance you have a dodgy network cable connecting the FreeNAS box?
-Will

Tested with Iperf on the server,


Transfers are still super slow, last night I had an idea, turn of antivirus and firewalls! I figured that would help,
so I run my computer with nothing but essential services and copy files over to the server, still very slow with lots of pausing.

Also a slightly unrelated side note, do you know if there is a way to keep thumbnails on the server?
I store many photos on there from a dslr and ever time I goto the folder it has to re-render each photos thumbnail instead of saving it from the last time.
Thanks again

 

[StephenFry]

8.2.0-beta3 gives me constant kernel panics, beta2 is fine.

 

[CatMan]

8.2.0-beta3 gives me constant kernel panics, beta2 is fine.

I am using beta 2, I was going to upgrade to beta 3 sometime though...

PS, I love your servers name "El cheapo" haha!