Re: kern/44625: memory exhaustion on NFS server while writing many files

[hash%abox3.so-net.ne.jp@localhost]

The following reply was made to PR kern/44625; it has been noted by GNATS.

From: hash%abox3.so-net.ne.jp@localhost
To: Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>, 
dholland%netbsd.org@localhost
Cc: gnats-bugs%NetBSD.org@localhost, kern-bug-people%netbsd.org@localhost, 
gnats-admin%netbsd.org@localhost,
        netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/44625: memory exhaustion on NFS server while writing many 
files
Date: Thu, 17 Mar 2011 16:19:22 +0900

 hi,
 
 On Thu, 17 Mar 2011 05:31:36 +0000
 Mindaugas Rasiukevicius <rmind%netbsd.org@localhost> wrote:
 
 > hash%abox3.so-net.ne.jp@localhost wrote:
 > > <...>
 > > The Npage of pnbufpl grows extremely.
 > > 
 > > I also tried some kernels checked out on other date. It seems that
 > > this leakage is seen after struct componentname changes on Nov 30 2010.
 > 
 > http://nxr.netbsd.org/xref/src/sys/nfs/nfs_serv.c?r=1.156#465
 > 
 > A leak in this error path (at least)?
 
 Good catch! I confirm that lookup'ing various nonexistent names
 (like below script) on NFS client causes leak.
 Thank you.
 
 #!/bin/sh -
 i=1
 while : ; do
   # /usr/nfs/ is empty
   cat /usr/nfs/$i > /dev/null 2>&1
   i=$((i + 1))
 done
 
 
 --
 Takahiro HAYASHI