NetBSD Problem Report #34667

From simonb@thistledown.com.au  Sat Sep 30 04:27:42 2006
Return-Path: <simonb@thistledown.com.au>
Received: from mail.netbsd.org (mail.netbsd.org [204.152.190.11])
	by narn.NetBSD.org (Postfix) with ESMTP id 5093563B8CA
	for <gnats-bugs@gnats.NetBSD.org>; Sat, 30 Sep 2006 04:27:42 +0000 (UTC)
Message-Id: <20060930031555.12EC8AFD44@thoreau.thistledown.com.au>
Date: Sat, 30 Sep 2006 13:15:55 +1000 (EST)
From: Simon Burge <simonb@NetBSD.org>
Reply-To: Simon Burge <simonb@NetBSD.org>
To: gnats-bugs@NetBSD.org
Subject: NTFS uses to much kernel memory
X-Send-Pr-Version: 3.95

>Number:         34667
>Category:       kern
>Synopsis:       NTFS uses to much kernel memory
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    jdolecek
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Sep 30 04:30:00 +0000 2006
>Last-Modified:  Tue Jan 23 22:07:34 +0000 2024
>Originator:     Simon Burge
>Release:        NetBSD 4.99.2 from September 24.
>Organization:
>Environment:
NetBSD euclid.thistledown.com.au 4.99.2 NetBSD 4.99.2 (EUCLID2) #14: Sun Sep 24 13:53:40 EST 2006  simonb@euclid.thistledown.com.au:/home/netbsd/src/sys/arch/i386/compile/EUCLID2 i386
Architecture: i386
Machine: i386
>Description:

        Every couple of nights when /etc/daily runs it's find, I get a

		panic: malloc: out of space in kmem_map

        panic.  A "vmstat -m" on the kernel core shows that NTFS is
        using about 119MB of the 128MB allocated for kmem_map:

Memory statistics by type                           Type  Kern
         Type  InUse MemUse HighUse  Limit  Requests Limit Limit Size(s)
     NTFS vrun  7056   131K    131K 78644K      7060    0     0  16,32,64,128,256,512
      NTFS dir 12496 49984K  49984K 78644K     12496    0     0  4096
 NTFS res data 44690  7836K   7836K 78644K     44695    0     0  16,64,128,256,512,1024,131072
    NTFS vattr 48217 24109K  24109K 78644K     48224    0     0  512
    NTFS fnode 81032 20258K  20258K 78644K     81034    0     0  256
   NTFS ntnode 81032 20258K  20258K 78644K     81034    0     0  256

>How-To-Repeat:

        Mount a NTFS filesystem with about 127000 files and run find(1).
        Note that the find from /etc/daily doesn't cause the kernel to
        run out of memory every night, seems to be about every third
        night...

>Fix:

        Not sure.  Converting NTFS to use pools should at least relieve
        some pressure on kmem_map.  The "NTFS dir" allocations (the
        largest memory user) though are not fixed size, so won't convert
        to pools easily.

>Release-Note:

>Audit-Trail:

Responsible-Changed-From-To: kern-bug-people->jdolecek
Responsible-Changed-By: jdolecek@NetBSD.org
Responsible-Changed-When: Tue, 23 Jan 2024 22:07:34 +0000
Responsible-Changed-Why:
I might look into this eventually.


>Unformatted:

NetBSD Home
NetBSD PR Database Search

(Contact us) $NetBSD: query-full-pr,v 1.47 2022/09/11 19:34:41 kim Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
Copyright © 1994-2024 The NetBSD Foundation, Inc. ALL RIGHTS RESERVED.