Date: Mon, 25 Mar 2013 09:27:11 GMT From: Sergey Kandaurov <pluknet@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/177366: [ieee80211] negative malloc(9) statistics for 80211node Message-ID: <201303250927.r2P9RBx5068772@red.freebsd.org> Resent-Message-ID: <201303250930.r2P9U0cZ087950@freefall.freebsd.org>
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>Number: 177366
>Category: kern
>Synopsis: [ieee80211] negative malloc(9) statistics for 80211node
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Mar 25 09:30:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Sergey Kandaurov
>Release: FreeBSD 9.1-STABLE
>Organization:
>Environment:
FreeBSD omg 9.1-STABLE FreeBSD 9.1-STABLE #0: Sun Mar 24 18:49:50 MSK 2013 root@omg:/usr/obj/amd64.amd64/usr/src/sys/GENERIC amd64
>Description:
After upgrading from 8-stable to 9-stable I noticed the
error in malloc(9) type 80211node counter. From vmstat -m:
Type InUse MemUse HighUse Requests Size(s)
80211node 18446744073709551605 18014398509481852K - 0
18446744073709551605/18014398509481852
1024.00000
18446744073709551605/2^64
.99999
2^64-18446744073709551605
11
Looks like it updates stats on free and forget to update on malloc,
so it goes negative and wraps on uint64_t.
(kgdb) p ((struct malloc_type_internal *)M_80211_NODE->ks_handle)->mti_stats[0]
$20 = {mts_memalloced = 0, mts_memfreed = 61440, mts_numallocs = 0, mts_numfrees = 5, mts_size = 0, _mts_reserved1 = 0, _mts_reserved2 = 0,
_mts_reserved3 = 0}
(kgdb) p ((struct malloc_type_internal *)M_80211_NODE->ks_handle)->mti_stats[1]
$21 = {mts_memalloced = 0, mts_memfreed = 73728, mts_numallocs = 0, mts_numfrees = 6, mts_size = 0, _mts_reserved1 = 0, _mts_reserved2 = 0,
_mts_reserved3 = 0}
(kgdb) p mp_ncpus
$1 = 2
mts_numfrees[i] - mts_numallocs[i] => 11
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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