[pso] [tema1][lin]Re:soft lockup

[Pisau Andrei]

----- Original Message ----
From: Florin <f.bratu at yahoo.com>
To: discutii pso <pso at cursuri.cs.pub.ro>
Sent: Wednesday, March 7, 2007 4:16:46 PM
Subject: [pso] [tema1][lin]Re:soft lockup

>Am reusit sa corectez eroarea care cauza acest "soft lockup" atunci cand inseram modulul. Acum sunt >in stare sa rulez testul, insa la fel, la una din etapele testului, imi da "soft lockup".
>
>Eu voiam insa sa stiu ce inseamna "soft lockup", ce tip de eroare este si care sunt conditiile in care >apare. Am cautat pe google si pe wikipedia, si nu am gasit nimic concret.


http://ubuntuforums.org/showthread.php?t=251944

"According to the kernel sources (kernel/softlockup.c) the error "soft
lockup detected" means a CPU in kernel code didn't reschedule for 10
seconds or more (watchdog timeout). It may be caused by driver code
(IDE/SATA/NIC?) that processes hardware interrupts for more than 10
seconds without rescheduling other threads."

Cum tu ai spus intr-un mail precedent, ca in oops ai in trace apeluri de functii ale tale, atunci mai uitate pe cod dupa lockuri neinitializate, sau folosite gresit.
Daca totul pare in regula, poti vedea si urmatoarele:

cat /proc/interrupts si vezi daca nu cumva IRQ sunt prelucrate in numar prea mare de un CPU.

Daca da, poti instala un utilitar irqbalance, sau poti recompila kernelul cu  optiunea de IRQ balancing enabled.


Aparent soft lookup, in versiuni de kernel precedente 2.6.18, se manifesta ca bug, mai ales cand se lucra cu driverul wireless. Dar aparent e fixat.

>Va multumesc pentru hint-ul cu netconsole. O sa il testez si o sa obtin, hopefully, si un output.






 
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