[Samba] smbd processes 99% cpu and end-user locks up
mz at seh.de
Wed Oct 19 14:51:20 GMT 2005
On Linux the syntax is gdb -p <pid>.
The "..39389: No such file..." message seems to tell, that you didn't
attach to the process but tried to debug a file called 39389.
Nathan Vidican wrote:
> Okay, re-compiled with -g, (I think), assuming the -g was to CFLAGS, I
> attached the output of ./configure --prefix=/usr/samba CFLAGS=-g, the
> output of make, and the warnings reported by make.
> When I run a `top` and get an output similar to this (pardon the
> word-wrap mangling):
> last pid: 39681; load averages: 1.04, 1.02, 0.88 up 3+17:11:28
> 67 processes: 1 running, 66 sleeping
> CPU states: 6.9% user, 0.0% nice, 43.1% system, 0.0% interrupt, 50.0%
> Mem: 56M Active, 1530M Inact, 228M Wired, 59M Cache, 213M Buf, 9144K Free
> Swap: 4087M Total, 48K Used, 4087M Free
> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU
> 39389 root 1 114 0 30716K 8704K CPU0 0 33:04 99.17% smbd
> 494 ldap 4 20 0 118M 7768K kserel 0 0:20 0.00%
> 7249 root 1 96 0 21460K 4188K select 0 0:07 0.00%
> 318 root 1 96 0 3532K 940K select 0 0:03 0.00%
> 39470 root 1 96 0 30852K 8836K select 0 0:03 0.00% smbd
> 39505 pcarlini 1 96 0 31256K 9292K select 1 0:03 0.00% smbd
> I then tried a 'gdb 39389', which gave me a prompt something like this:
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you
> welcome to change it and/or distribute copies of it under certain
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for details.
> This GDB was configured as "amd64-marcel-freebsd"...39389: No such file
> or directory.
> Where I then tried 'bt' as you instructed and got:
> (gdb) bt
> No stack.
> What am I doing wrong? Admittedly never done anything before with gdb
> and not too sure of what I'm doing here... assuming CFLAGS=-g was what
> you meant by compile smbd with -g, and I didn't get any warnings running
> gdb <pid>, so assuming it worked... what next?
Martin Zielinski mz at seh.de
SEH Computertechnik GmbH www.seh.de
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