On 10 June 2011 00:01, Jim Bryant <kc5vdj.free...@gmail.com> wrote:
> i'm not sure which list this belongs to, so i'm posting to -hackers and
> -stable.
>
> i've noticed for a while now that during heavy activity (for instance
> buildworld), that top will get these kvm_read errors when reading proc
> mem entries.
Hi.
I think that is a question of whether it's acceptable to hide all errors
originated in kvm(3):
Index: usr.bin/top/machine.c
===================================================================
--- usr.bin/top/machine.c (revision 222893)
+++ usr.bin/top/machine.c (working copy)
@@ -265,7 +265,7 @@
else if (namelength > UPUNAMELEN)
namelength = UPUNAMELEN;
- kd = kvm_open(NULL, _PATH_DEVNULL, NULL, O_RDONLY, "kvm_open");
+ kd = kvm_open(NULL, _PATH_DEVNULL, NULL, O_RDONLY, NULL);
if (kd == NULL)
return (-1);
Or rewrite top(1) a little more to open kvm with kvm_openfiles(), to let
the caller decide itself in what places it needs to print an error with
kvm_geterr().
>
> i have included a screenshot of what happens during such events...
>
> last pid: 92024; load averages: 4.79, 4.58,
> 4.10
> up 0+00:49:07 15:30:53
> 225 processes: 10 running, 197 sleeping, 18 waiting
> CPU: 90.6% user, 0.0% nice, 9.4% system, 0.0% interrupt, 0.0% idle
> Mem: 493M Active, 1337M Inact, 604M Wired, 632K Cache, 315M Buf, 524M Free
> Swap: 4097M Total, 4097M Free
> kvm_open: cannot open /proc/86755/mem
> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> 91943 root 1 97 0 39536K 33620K RUN 1 0:01 7.37%
> [cc1plus]
> 2859 jbryant 1 48 0 406M 72332K select 0 3:10 5.96%
> kwin -session 1028b2382461f5000127042056000000019550000_13
> 2747 root 1 46 0 419M 370M select 0 1:43 4.39%
> /usr/local/bin/X :0 -nolisten tcp -auth /var/run/xauth/A:0
> 1464 root 1 44 0 8068K 1384K select 0 0:03 0.39%
> /usr/sbin/moused -p /dev/ums0 -t auto -I /var/run/moused.u
> 11219 jbryant 7 44 0 299M 109M select 1 0:17 0.29%
> /usr/local/lib/thunderbird/thunderbird-bin
> 2865 jbryant 1 45 0 453M 86140K select 0 0:21 0.20%
> kdeinit4: kdeinit4: plasma-desktop (kdeinit4)
> 2882 jbryant 1 44 0 391M 60996K select 0 0:17 0.10%
> kdeinit4: kdeinit4: kmix -session 102511e52251c60001304471
> 92001 root 1 97 0 23452K 22256K CPU1 1 0:00 0.00% [cc1]
> 92017 root 1 96 0 16172K 13440K RUN 0 0:00 0.00% [cc1]
>
[snip]
--
wbr,
pluknet
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