Kernel memory leak in 8.2-PRERELEASE?

[Boris Kochergin]

On 04/02/11 11:33, Kostik Belousov wrote:
> 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.

Thanks. Will update to today's 8-STABLE and report back.

-Boris