Jeff,
Using the latest Autofs source code from I received the following
results:
large-rr.domain.tld contains 49 A records in DNS.
small-rr.domain.tld contains 16 A records (a subset of large-rr).
Test 1:
I configured auto.home with the entry:
brian -rsize=8192,wsize=8192,proto=tcp,vers=3
large-rr:/home/brian
# time ls /home/brian/.bash_history
/home/brian/.bash_history
real 0m0.734s
user 0m0.000s
sys 0m0.000s
Test 2:
I then rebooted the server to remove any local cached anything and
updated auto.home to have:
brian -rsize=8192,wsize=8192,proto=tcp,vers=3
small-rr:/home/brian
# time ls -alht /home/brian/.bash_history
-rw------- 1 brian support 13K Nov 15 10:39
real 0m0.126s
user 0m0.000s
sys 0m0.004s
During Test 1 there were 1,160 DNS packets (580 UDP packets, 580 TCP
packets). During Test 2 there were 196 packets (all UDP).
---
James T. Richardson, Jr.
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-----Original Message-----
From: Jeff Moyer [mailto:[EMAIL PROTECTED]
Sent: Friday, December 21, 2007 7:58 AM
To: Ian Kent
Cc: James Richardson; [email protected]
Subject: Re: [autofs] Slow mounts when using large round robin sets
Ian Kent <[EMAIL PROTECTED]> writes:
> On Thu, 2007-12-20 at 16:42 -0600, James Richardson wrote:
>> Jeff,
>>
>> I downloaded the sources via git
>> (git://git.kernel.org/pub/scm/linux/storage/autofs/autofs.git)
however
>> when automount starts up I get a floating point exception. I would
>> appreciate those debug patches you mentioned as I'm not sure where
the
>> floating point exception is occurring.
>
> I don't remember saying anything about debugging patches?
I mentioned that we could provide targeted debugging patches to
try to figure out the problem. They do not exist yet, and they
certainly would not point out why he's getting a floating point
exception! ;)
>> # strace automount -d
>> execve("/usr/sbin/automount", ["automount", "-d"], [/* 24 vars */]) =
0
>> uname({sys="Linux", node="c33n69", ...}) = 0
>> brk(0) = 0x80041000
>> --- SIGFPE (Floating point exception) @ 0 (0) ---
>> +++ killed by SIGFPE +++
>> Process 3702 detached
>> [EMAIL PROTECTED] ~]# uname -a
>> Linux c33n69 2.6.21-GX #1 SMP Thu Apr 26 14:03:16 CDT 2007 i686 i686
>> i386 GNU/Linux
>
> I really don't know what's happening here.
> There's not enough info.
What Ian means is that you'd have to provide a stack trace from gdb at
the very least. The output from automount -V wouldn't hurt, either.
-Jeff
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