[...]
Nothing is wrong with your filesystem.
Thanks for the explanation.
I'm curious what your system config is: CPU speed, how many CPUs, what
type of disk and controler are under your XFS filesystems. It could
be time to revisit my defintion of "looping excessively" in this
context.
It is a single P3 running bind 9 and sendmail under medium-heavy load.
I've tried to cut-n-paste the relevant diagnostic outputs below.
I've just noticed a problem that the machine has a VIA chipset but the
kernel only had Intel/generic support so it wasn't running in a DMA
mode. The buffered read rate from hdparm -t was only 4 MB/s.
When using the generic IDE driver that log line would be written every
few minutes. I haven't seen it since switching to using the VIA driver.
I guess the problem is the classic operator error. :'/
Thanks for the help!
ds
<from dmesg>
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller at PCI slot 0000:00:04.1
VP_IDE: chipset revision 16
VP_IDE: not 100% native mode: will probe irqs later
VP_IDE: VIA vt82c686a (rev 22) IDE UDMA66 controller on pci0000:00:04.1
ide0: BM-DMA at 0xb800-0xb807, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xb808-0xb80f, BIOS settings: hdc:DMA, hdd:pio
hda: QUANTUM FIREBALLP AS30.0, ATA DISK drive
Using anticipatory io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hdc: Pioneer DVD-ROM ATAPIModel DVD-116 0107, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
hda: max request size: 128KiB
hda: 60233564 sectors (30839 MB) w/1902KiB Cache, CHS=59755/16/63, UDMA(66)
/dev/ide/host0/bus0/target0/lun0: p1 p2 p3 p4
hdc: ATAPI 40X DVD-ROM drive, 256kB Cache, UDMA(33)
<from lspci -v>
0000:00:04.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 10)
(prog-if 8a [Master SecP PriP])
Flags: bus master, stepping, medium devsel, latency 32
I/O ports at b800 [size=16]
Capabilities: [c0] Power Management version 2
mx3 root # cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 6
cpu MHz : 870.633
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
cmov pat pse36 mmx fxsr sse
bogomips : 1716.22
mx3 root # cat /proc/meminfo
MemTotal: 387520 kB
MemFree: 71572 kB
Buffers: 43728 kB
Cached: 116852 kB
SwapCached: 0 kB
Active: 171312 kB
Inactive: 32692 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 387520 kB
LowFree: 71572 kB
SwapTotal: 506036 kB
SwapFree: 506036 kB
Dirty: 4308 kB
Writeback: 0 kB
Mapped: 50484 kB
Slab: 109908 kB
Committed_AS: 85384 kB
PageTables: 412 kB
VmallocTotal: 638968 kB
VmallocUsed: 292 kB
VmallocChunk: 638676 kB
<using the VIA IDE driver>
mx3 root # hdparm -Tt /dev/hda
/dev/hda:
Timing buffer-cache reads: 612 MB in 2.00 seconds = 305.89 MB/sec
Timing buffered disk reads: 92 MB in 3.01 seconds = 30.60 MB/sec
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