5 messages in org.freebsd.freebsd-smallRe: NFS root and unnecessary NFS oper...| From | Sent On | Attachments |
|---|---|---|
| Brian Candler | Apr 25, 2002 9:41 am | |
| Luigi Rizzo | Apr 25, 2002 9:49 am | |
| Brian Candler | Apr 25, 2002 9:59 am | |
| Brian Candler | Apr 26, 2002 9:01 am | |
| Brian Candler | Apr 26, 2002 9:57 am |
| Subject: | Re: NFS root and unnecessary NFS operations | |
|---|---|---|
| From: | Brian Candler (B.Ca...@pobox.com) | |
| Date: | Apr 25, 2002 9:59:38 am | |
| List: | org.freebsd.freebsd-small | |
On Thu, Apr 25, 2002 at 09:49:44AM -0700, Luigi Rizzo wrote:
Off the top of my head, i think you might see accesses to /etc/malloc.conf (on stock 'diskless' FreeBSD installations, at least recently, /etc goes onto a RAMdisk so you don't see these accesses).
My system has /etc in RAMdisk too. Actually it's a ramdisk on /conf/etc which is null-mounted back onto /etc, although I notice that newer distributions eliminate this by just putting a ramdisk on /etc.
using tcpdump -v -s 256 might give you a better idea on what accesses are being attempted.
Good idea, although it doesn't show much more. Running test (3) again gives
# tcpdump -n -i fxp0 -s 1500 -v udp port 2049
...
17:55:00.686348 192.168.0.91.649129623 > 192.168.0.1.2049: 104 access fh
Unknown/1 003f (ttl 64, id 10087)
17:55:00.686515 192.168.0.1.2049 > 192.168.0.91.649129623: reply ok 120 access
attr: REG 444 ids 0/0 sz 35124 c 0001 (ttl 64, id 41864)
...
So maybe it's just checking permissions each time the file is opened? But there is supposed to be an access cache. sysctl reports: vfs.nfs.access_cache_timeout: 60
Cheers,
Brian.
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