Date: Mon, 04 Apr 2011 20:56:10 -0400 From: Boris Kochergin <spawk@acm.poly.edu> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: Kostik Belousov <kostikbel@gmail.com>, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: Kernel memory leak in 8.2-PRERELEASE? Message-ID: <4D9A68AA.6040803@acm.poly.edu> In-Reply-To: <20110404224334.GA64297@icarus.home.lan> References: <4D972FF7.6010901@acm.poly.edu> <20110402153315.GP78089@deviant.kiev.zoral.com.ua> <4D974393.80606@acm.poly.edu> <4D9A307F.9070408@acm.poly.edu> <20110404224334.GA64297@icarus.home.lan>
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On 04/04/11 18:43, Jeremy Chadwick wrote: > On Mon, Apr 04, 2011 at 04:56:31PM -0400, Boris Kochergin wrote: >> On 04/02/11 11:41, Boris Kochergin wrote: >>> 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@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 >> The problem persists, I'm afraid, and seems to have crept up a lot >> more quickly than before: >> >> # uname -a >> FreeBSD exodus.poly.edu 8.2-STABLE FreeBSD 8.2-STABLE #3: Sat Apr 2 >> 11:48:43 EDT 2011 >> spawk@exodus.poly.edu:/usr/obj/usr/src/sys/EXODUS amd64 >> >> Mem: 314M Active, 955M Inact, 6356M Wired, 267M Cache, 828M Buf, 18M Free >> >> Any ideas for a diagnostic recourse? > Can you please provide the details I requested here? Thanks. > > http://lists.freebsd.org/pipermail/freebsd-stable/2011-April/062147.html > No swap, blank /boot/loader.conf, default /etc/sysctl.conf. I'm going to try this ARC tuning thing. I vaguely recall several claims that tuning wasn't necessary anymore on amd64 systems with the amount of memory mine has, but that's obviously not the case. -Boris
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