linux-kernel - Re: 2.6.16.32 stuck in generic_file_aio

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Message-ID: <Pine.LNX.4.58.0612140953080.9623@jdi.jdi-ict.nl>
Date:	Thu, 14 Dec 2006 09:55:38 +0100 (CET)
From:	Igmar Palsenberg <i.palsenberg@...-ict.nl>
To:	Andrew Morton <akpm@...l.org>
cc:	linux-kernel@...r.kernel.org, npiggin@...e.de,
	erich <erich@...ca.com.tw>
Subject: Re: 2.6.16.32 stuck in generic_file_aio_write()


> > Hmm.. Switching CONFIG_HZ from 1000 to 250 seems to 'fix' the problem. 
> > I haven't seen the issue in nearly a week now. This makes Andrew's theory 
> > about missing interrupts very likely.
> > 
> > Andrew / others : Is there a way to find out if it *is* missing 
> > interrupts ?
> > 
> 
> umm, nasty.  What's in /proc/interrupts?

See below. The other machine is mostly identifical, except for i8042 
missing (probably due to running an older kernel, or small differences in 
the kernel config).

Regards,


	Igmar

[jdiict@...01 ~]$ cat /proc/interrupts
           CPU0       CPU1
  0:   73702693   74509271   IO-APIC-edge      timer
  1:          1          1   IO-APIC-edge      i8042
  4:       2289       8389   IO-APIC-edge      serial
  8:          0          1   IO-APIC-edge      rtc
  9:          0          0   IO-APIC-fasteoi   acpi
 12:          3          1   IO-APIC-edge      i8042
 16:  203127788          0   IO-APIC-fasteoi   uhci_hcd:usb2, eth0
 17:        525        492   IO-APIC-fasteoi   uhci_hcd:usb4
 18:   13000070   67584889   IO-APIC-fasteoi   arcmsr
 19:          0          0   IO-APIC-fasteoi   ehci_hcd:usb1
 20:          0          0   IO-APIC-fasteoi   uhci_hcd:usb3
NMI:          0          0
LOC:  148127756  148133476
ERR:          0
MIS:          0
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