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SubjectRe: [patch] voluntary-preempt-2.6.9-rc2-mm1-S1
sorry for the scrambled reply,
i'm not subscribed
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in reply to:
-----------------------
List: linux-kernel
Subject: Re: [patch] voluntary-preempt-2.6.9-rc2-mm1-S1
From: Shane Shrybman <shrybman () aei ! ca>
Date: 2004-09-20 21:16:07
Message-ID: <1095714967.3646.14.camel () mars>
[Download message RAW]

I am having what appears to be IDE DMA problems with 2.6.9-rc2-mm1-S1.
2.6.9-rc2-mm1 does not show this problem and runs fine. Before this I
was happily using 2.6.8-rc3-O5.

I tried booting with acpi=off but was unable to enter my user name at
the login prompt, it just hung with no response to sysreq. I also tried
turning off irq threading for that irq but it made no difference.

There is one drive on the secondary channel of this Promise TX133. This
is what appears in the log after a minute or two of using the drive.

hdg: dma_timer_expiry: dma status == 0x24
PDC202XX: Secondary channel reset.
hdg: DMA interrupt recovery
hdg: lost interrupt
hdg: dma_timer_expiry: dma status == 0x24
PDC202XX: Secondary channel reset.
hdg: DMA interrupt recovery
hdg: lost interrupt
hdg: dma_timer_expiry: dma status == 0x24
PDC202XX: Secondary channel reset.
[..many repeats..]

......
---------------------------------------

i'm getting the same problem
(although not sure if the dma status was the same)
if i enable hardirq preemption
turning acpi on/off doesn't change anything
io/up apic is on (haven't tried disabling it)

with hardirq preemption disabled in .config
everything looks fine sofar (~5h )


-----------------------------
666 root 16 -10 0 0 0 S 0.0 0.0 0:00.00 IRQ 17
670 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 IRQ 14
673 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 IRQ 15
711 root 25 0 0 0 0 S 0.0 0.0 0:00.23 khubd
712 root 16 -10 0 0 0 S 0.0 0.0 0:00.00 IRQ 21

----------------------------
this puzzles me a bit
aren't those hardirqs ?
why are they listed as threads, in case i compiled
with
----------------
[svetljo@svetljo rc2mm1]$ grep PREEMPT .config
# CONFIG_PREEMPT_TIMING is not set
CONFIG_PREEMPT=y
CONFIG_PREEMPT_VOLUNTARY=y
CONFIG_PREEMPT_SOFTIRQS=y
# CONFIG_PREEMPT_HARDIRQS is not set
----------------

best,

svetljo
PS.

PC is up amd xp 2700 KT400 VT8235 (Epox 8k9A3+)
[svetljo@svetljo rc2mm1]$ cat /proc/interrupts
CPU0
0: 20809263 IO-APIC-edge timer
2: 0 XT-PIC cascade
14: 516 IO-APIC-edge ide4
15: 478 IO-APIC-edge ide5
16: 1763130 IO-APIC-level radeon@pci:0000:01:00.0
17: 894337 IO-APIC-level ide0, ide2, ide3, eth0
18: 59771 IO-APIC-level EMU10K1
21: 1120812 IO-APIC-level uhci_hcd, uhci_hcd, uhci_hcd, ehci_hcd
23: 2395783 IO-APIC-level eth1
NMI: 0
LOC: 20810017
ERR: 0
MIS: 485

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