tis 2003-02-25 klockan 17.01 skrev Karl Hammar:
men däremot hittar jag
meddelanden i loggen: Kernel spurious 8259A interupt; IRQ7 på två
ställen. Någon som vet vad det gäller? Kan det ha något samband med
någon fläkt vars lager är på upphällningen? Något med temperaturen? Kan
jag friskriva disken?
Från:
Intel386TM EX Embedded Microprocessor User' s Manual
Intel Corporation
1996
Order Number 272485-002
(går förmodligen att ladda ner från nätet)
9.4.3 Spurious Interrupts
For both edge and level-triggered interrupts, a high level must be
maintained on the IR line until after the falling edge of the first
INTA# pulse (see Figure 9-18). A spurious interrupt request is generated
if this stipulation is not met. A spurious interrupt on any IR line
generates the same vector number as an IR7 request. The spurious
interrupt, however, does not set the in-service bit for IR7. Therefore,
an IR7 interrupt service routine must check the in-service register to
determine whether the interrupt source was a valid IR7 (the in-service
bit is set) or a spurious interrupt (the in-service bit is cleared).
(IR = interrupt request)
Dvs. en sk. surious interrupt inträffar bara för irq7, men manualen
säger ingenting varför de inträffar.
Tack alla för tipsen,
jag är nöjd med detta! Min tolkning är att våra vänner kernel-experter
inte bedömt det vara mödan värt att analysera detta meddelande närmare,
och eftersom jag litar på storebror så sitter jag nöjd, dvs jag oroar
mig inte och låtsas som om det regnar.
(jag hittar dessutom inget i maskinen anslutet till IRQ7)
/Anders W
Från kärnan:
$ sed -ne '272,286p' /usr/src/kernel-source-2.4.20/arch/i386/kernel/i8259.c
/*
* Lightweight spurious IRQ detection. We do not want
* to overdo spurious IRQ handling - it's usually a sign
* of hardware problems, so we only do the checks we can
* do without slowing down good hardware unnecesserily.
*
* Note that IRQ7 and IRQ15 (the two spurious IRQs
* usually resulting from the 8259A-1|2 PICs) occur
* even if the IRQ is masked in the 8259A. Thus we
* can check spurious 8259A IRQs without doing the
* quite slow i8259A_irq_real() call for every IRQ.
* This does not cover 100% of spurious interrupts,
* but should be enough to warn the user that there
* is something bad going on ...
*/
Från loggar:
# zgrep -C -i spurious /var/log/all.log.?.gz
/var/log/all.log.2.gz:Feb 22 10:10:18 swat kernel: ext3: No journal on
filesystem on ide0(3,2)
/var/log/all.log.2.gz:Feb 22 10:10:18 swat kernel: Adding Swap: 96384k
swap-space (priority -1)
/var/log/all.log.2.gz:Feb 22 10:10:18 swat kernel: spurious 8259A interrupt:
IRQ7.
/var/log/all.log.2.gz:Feb 22 10:10:18 swat kernel: Real Time Clock Driver
v1.10e
/var/log/all.log.2.gz:Feb 22 10:10:18 swat kernel: Linux Tulip driver version
0.9.15-pre12 (Aug 9, 2002)
/var/log/all.log.3.gz:Feb 21 08:42:38 pyrit ippl: ICMP message type
destination unreachable - bad port from 127.0.0.1
/var/log/all.log.3.gz:Feb 21 08:42:42 opal ippl: ICMP message type
destination unreachable - bad port from 127.0.0.1
/var/log/all.log.3.gz:Feb 21 08:42:52 swat kernel: spurious 8259A interrupt:
IRQ7.
/var/log/all.log.3.gz:Feb 21 08:43:04 opal ippl: port 13327 connection
attempt from 192.168.93.38
/var/log/all.log.3.gz:Feb 21 08:43:38 pyrit ippl: ICMP message type
destination unreachable - bad port from 127.0.0.1
/var/log/all.log.3.gz:--
/var/log/all.log.3.gz:Feb 21 16:18:48 swat kernel: Adding Swap: 96384k
swap-space (priority -1)
/var/log/all.log.3.gz:Feb 21 16:18:48 swat kernel: Real Time Clock Driver
v1.10e
/var/log/all.log.3.gz:Feb 21 16:18:48 swat kernel: spurious 8259A interrupt:
IRQ7.
/var/log/all.log.3.gz:Feb 21 16:18:48 swat kernel: Linux Tulip driver version
0.9.15-pre12 (Aug 9, 2002)
/var/log/all.log.3.gz:Feb 21 16:18:48 swat kernel: PCI: Found IRQ 9 for
device 00:0b.0
/var/log/all.log.4.gz:Feb 20 07:39:24 swat kernel:
/dev/ide/host0/bus0/target0/lun0: [PTBL] [1869/255/63] p1 p2 p3 p4 p5 p6 p7
p8
/var/log/all.log.4.gz:Feb 20 07:39:24 swat kernel: ext3: No journal on
filesystem on ide0(3,2)
/var/log/all.log.4.gz:Feb 20 07:39:24 swat kernel: spurious 8259A interrupt:
IRQ7.
/var/log/all.log.4.gz:Feb 20 07:39:24 swat kernel: Adding Swap: 96384k
swap-space (priority -1)
/var/log/all.log.4.gz:Feb 20 07:39:24 swat kernel: Real Time Clock Driver
v1.10e
/var/log/all.log.5.gz:Feb 19 08:53:01 swat kernel:
/dev/ide/host0/bus0/target0/lun0: [PTBL] [1869/255/63] p1 p2 p3 p4 p5 p6 p7
p8
/var/log/all.log.5.gz:Feb 19 08:53:01 swat kernel: ext3: No journal on
filesystem on ide0(3,2)
/var/log/all.log.5.gz:Feb 19 08:53:01 swat kernel: spurious 8259A interrupt:
IRQ7.
/var/log/all.log.5.gz:Feb 19 08:53:01 swat kernel: Adding
