truss and procfs strange problem.

Proniewski Patrick patrick.proniewski at
Thu Jan 26 02:08:46 PST 2006


I experience a strange problem with truss on FreeBSD 5.4 p8 :

	$ truss ls
	truss: cannot open /proc/4509/mem: No such file or directory
	$ truss ls
	truss: PIOCWAIT: Input/output error

of course, PROCFS is mounted :

	$ df procfs
	Filesystem 1K-blocks Used Avail Capacity  Mounted on
	procfs             4    4     0   100%    /proc

but, if I count `ls -1 /proc/ | wc -l` the result will always be limited
to 128, even if I have more than 200 lines in ps aux output :

	$ ls -1 /proc/ | wc -l
	$ ps aux | wc  -l

It really looks like a power of 2 limit, this is very strange.

The box is a PIV 3GHz, with HTT enabled  
(machdep.hyperthreading_allowed=1). Complete sysctl available at  
<>, Kernel config below.

$ uname -a
FreeBSD my_box 5.4-RELEASE-p8 FreeBSD 5.4-RELEASE-p8 #0: Sun Oct 16
17:12:30 CEST 2005
patpro at my_box:/usr/obj/usr/src/sys/PATPRO-20050829  i386

# egrep -v ^# /usr/src/sys/i386/conf/PATPRO-20050829

machine         i386
cpu             I686_CPU
ident           PATPRO-20050829

options         SCHED_4BSD
options         INET
options         FFS
options         SOFTUPDATES
options         UFS_ACL
options         UFS_DIRHASH
options         MD_ROOT
options         NFSCLIENT
options         NFSSERVER
options         NFS_ROOT
options         MSDOSFS
options         CD9660
options         PROCFS
options         PSEUDOFS
options         GEOM_GPT
options         COMPAT_43
options         COMPAT_FREEBSD4
options         SCSI_DELAY=15000
options         KTRACE
options         SYSVSHM
options         SYSVMSG
options         SYSVSEM
options         KBD_INSTALL_CDEV
options         AHC_REG_PRETTY_PRINT
options         AHD_REG_PRETTY_PRINT
options         ADAPTIVE_GIANT
options         ALTQ
options         ALTQ_CBQ
options         ALTQ_RED
options         ALTQ_RIO
options         ALTQ_HFSC
options         ALTQ_PRIQ
options         ALTQ_NOPCC
options         SMP
options         MPTABLE_FORCE_HTT

device          apic
device          isa
device          eisa
device          pci
device          fdc
device          ata
device          atadisk
device          ataraid
device          atapicd
device          atapifd
device          atapist
options         ATA_STATIC_ID
device          atkbdc
device          atkbd
device          psm
device          vga
device          splash
device          sc
device          agp
device          npx
device          pmtimer
device          sio
device          ppc
device          ppbus
device          ppi
device          em
device          miibus
device          fxp
device          ex
device          loop
device          mem
device          io
device          random
device          ether
device          tun
device          pty
device          md
device          bpf
device          uhci
device          ohci
device          ehci
device          usb
device          ugen
device          uhid
device          ukbd

Administrateur Système - SENTIER - Université Lumière Lyon 2

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