Re: kern/38265: sometimes /kern directory can not be read

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Mar 20, 2008 at 09:30:00AM +0000, dlagno%rambler.ru@localhost wrote:
> >Number:         38265
> >Category:       kern
> >Synopsis:       sometimes /kern directory can not be read
> >Confidential:   no
> >Severity:       non-critical
> >Priority:       medium
> >Responsible:    kern-bug-people
> >State:          open
> >Class:          sw-bug
> >Submitter-Id:   net
> >Arrival-Date:   Thu Mar 20 09:30:00 +0000 2008
> >Originator:     Denis Lagno
> >Release:        4.99.55
> >Organization:
> >Environment:
> NetBSD flam.gado 4.99.55 NetBSD 4.99.55 (FLAM) #0: Wed Mar 19 19:10:28 MSK 
> 2008  
> dina%flam.gado@localhost:/volatile/worksrc/netbsd-current/obj/sys/arch/i386/compile/FLAM
>  i386
> >Description:
> kernfs is mounted:
> 
> $ mount | grep kern
> kernfs on /kern type kernfs (read-only, local)
> 
> $ cat /etc/fstab | grep kern                                                  
>                                 
> none                                                    /kern                 
>                                                                               
>     kernfs  ro                                                                
>                                               0       0
> 
> individual files can be read:
> 
> $ cat /kern/hz          
> 100
> 
> However directory /kern sometimes fails to be read:

FWIW I also see this on some systems:
rap:/usr/home/bouyer>ls /kern/
rap:/usr/home/bouyer>ls /kern/xen
privcmd   xenbus    xsd_port
rap:/usr/home/bouyer>

 29742      1 ls       CALL  open(0x7f7ffd808c00,4,0)
 29742      1 ls       NAMI  "/kern"
 29742      1 ls       RET   open 4
 29742      1 ls       CALL  fcntl(4,2,1)
 29742      1 ls       RET   fcntl 0
 29742      1 ls       CALL  __fstat30(4,0x7f7fffffd030)
 29742      1 ls       RET   __fstat30 0
 29742      1 ls       CALL  __sysctl(0x7f7fffffcfc0,2,0x7f7ffdb0e080,0x7f7fffff
cfb8,0,0)
 29742      1 ls       RET   __sysctl 0
 29742      1 ls       CALL  fstatvfs1(4,0x7f7fffffd0c0,2)
 29742      1 ls       RET   fstatvfs1 0
 29742      1 ls       CALL  lseek(4,0,0,1)
 29742      1 ls       RET   lseek 0
 29742      1 ls       CALL  __getdents30(4,0x7f7ffd81e000,0x1000)
 29742      1 ls       RET   __getdents30 -1 errno 9 Bad file descriptor
 29742      1 ls       CALL  close(4)
 29742      1 ls       RET   close 0

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--