Kernel memory leak in 8.2-PRERELEASE?

[Kostik Belousov]

On Sat, Apr 02, 2011 at 10:17:27AM -0400, Boris Kochergin wrote:
> Ahoy. This morning, I awoke to the following on one of my servers:
> 
> pid 59630 (httpd), uid 80, was killed: out of swap space
> pid 59341 (find), uid 0, was killed: out of swap space
> pid 23134 (irssi), uid 1001, was killed: out of swap space
> pid 49332 (sshd), uid 1001, was killed: out of swap space
> pid 69074 (httpd), uid 0, was killed: out of swap space
> pid 11879 (eggdrop-1.6.19), uid 1001, was killed: out of swap space
> ...
> 
> And so on.
> 
> The machine is:
> 
> FreeBSD exodus.poly.edu 8.2-PRERELEASE FreeBSD 8.2-PRERELEASE #2: Thu 
> Dec  2 11:39:21 EST 2010     
> spawk at exodus.poly.edu:/usr/obj/usr/src/sys/EXODUS  amd64
> 
> 10:13AM  up 120 days, 20:06, 2 users, load averages: 0.00, 0.01, 0.00
> 
> The memory line from top intrigued me:
> 
> Mem: 16M Active, 48M Inact, 6996M Wired, 229M Cache, 828M Buf, 605M Free
> 
> The machine has 8 gigs of memory, and I don't know what all that wired 
> memory is being used for. There is a large-ish (6 x 1.5-TB) ZFS RAID-Z2 
> on it which has had a disk in the UNAVAIL state for a few months:
> 
> # zpool status
>   pool: home
>  state: DEGRADED
> status: One or more devices could not be used because the label is 
> missing or
>         invalid.  Sufficient replicas exist for the pool to continue
>         functioning in a degraded state.
> action: Replace the device using 'zpool replace'.
>    see: http://www.sun.com/msg/ZFS-8000-4J
>  scrub: none requested
> config:
> 
>         NAME        STATE     READ WRITE CKSUM
>         home        DEGRADED     0     0     0
>           raidz2    DEGRADED     0     0     0
>             ada0    ONLINE       0     0     0
>             ada1    ONLINE       0     0     0
>             ada2    ONLINE       0     0     0
>             ada3    ONLINE       0     0     0
>             ada4    ONLINE       0     0     0
>             ada5    UNAVAIL      0    85    11  experienced I/O failures
> 
> errors: No known data errors
> 
> "vmstat -m" and "vmstat -z" output:
> 
> http://acm.poly.edu/~spawk/vmstat-m.txt
> http://acm.poly.edu/~spawk/vmstat-z.txt
> 
> Anyone have a clue? I know it's just going to happen again if I reboot 
> the machine. It is still up in case there are diagnostics for me to run.

Try r218795. Most likely, your issue is not leak.
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