Re: Losing ssh session when doing intensive disk I/O & background fsck with RELENG_6

From: Kris Kennaway (kris_at_obsecurity.org)
Date: 09/30/05

  • Next message: Robert Watson: "Re: Losing ssh session when doing intensive disk I/O & background fsck with RELENG_6" 
    Date: Fri, 30 Sep 2005 15:04:03 -0400
To: Listas <listas@informatica.info>

    On Fri, Sep 30, 2005 at 08:59:30PM +0200, Listas wrote:
    > I'm testing BETA5/RELENG_6 with an Intel P4 system. Here are the
    > essential dmesg fragments with system information:
    >
    > ---
    > ACPI APIC Table: <A M I OEMAPIC >
    > Timecounter "i8254" frequency 1193182 Hz quality 0
    > CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (3010.67-MHz 686-class CPU)
    > Origin = "GenuineIntel" Id = 0xf34 Stepping = 4
    > Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
    > Features2=0x441d<SSE3,RSVD2,MON,DS_CPL,CNTX-ID,<b14>>
    > real memory = 1073414144 (1023 MB)
    > avail memory = 1041526784 (993 MB)
    > ioapic0 <Version 2.0> irqs 0-23 on motherboard
    > [...]
    > xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xb800-0xb87f mem
    > 0xcddffc00-0xcddffc7f irq 17 at device 9.0 on pci1
    > miibus0: <MII bus> on xl0
    > xlphy0: <3Com internal media interface> on miibus0
    > xlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
    > xl0: Ethernet address: 00:01:02:a6:96:37
    > [...]
    > acd0: DMA limited to UDMA33, controller found non-ATA66 cable
    > acd0: DVDR <HL-DT-ST DVDRAM GSA-4160B/A300> at ata0-master UDMA33
    > ad8: 194481MB <Maxtor 6B200M0 BANC1980> at ata4-master SATA150
    > ad8: Intel calc=55e037a4 meta=2af01bd2
    > ad10: 194481MB <Maxtor 6B200M0 BANC1980> at ata5-master SATA150
    > ad10: Intel calc=55e037a4 meta=2af01bd2
    > ar0: 194480MB <Intel MatrixRAID RAID1> status: READY
    > ar0: disk0 READY (master) using ad8 at ata4-master
    > ar0: disk1 READY (mirror) using ad10 at ata5-master
    > Trying to mount root from ufs:/dev/ar0s1a
    > Loading configuration files.
    > No suitable dump device was found.
    > Entropy harvesting:
    > interrupts
    > ethernet
    > point_to_point
    > kickstart
    > .
    > swapon: adding /dev/ar0s1b as swap device
    > ---
    >
    > The boot process is trying to configure the dump device before swapon
    > and it fails, but that's not the real problem I report here.

    It's not clear that it's a problem at all. dump devices don't have to
    be pre-existing swap devices. If you tell your kernel to dump on
    /dev/ar0s1b it should be fine.

    > The problem is that when I do some intensive disk I/O (make install, du
    > -ckx /usr, etc.) just after booting, I lose my ssh connection to the
    > machine, and may spend a lot to reconnect. It seems that this only
    > happens while a background fsck is running.

    Don't know about this.

    Kris

  • Next message: Robert Watson: "Re: Losing ssh session when doing intensive disk I/O & background fsck with RELENG_6"