Subject : PROBLEM: kernel 220.127.116.11 crashes under I/O load
Submitter : Etienne Vogt <email@example.com>
Date : 2010-10-20 21:20
Message-ID : alpine.DEB.firstname.lastname@example.org
References : http://marc.info/?l=linux-kernel&m=128761179615272&w=2
This entry is being used for tracking a regression from 2.6.34. Please don't
close it until the problem is fixed in the mainline.
I've seen this since 2.6.31.*, mostly when doing multiple simultaneous video encodes which produced heavy I/O load. Finally found this solution: http://ubuntuforums.org/showthread.php?t=1363283
Setting libata.force=noncq kernel option at boot and turning off the HDD's write caching with hdparm seems to have solved it.
The problem reported by Sean Busby is probably different : I'm using the legacy IDE stack, not libata and it never crashed for me under 2.6.34.
I upgraded to 2.6.36 yesterday and for the moment, no crashes. I reprocessed the mpeg file that crashed under 18.104.22.168 and it worked fine under 2.6.36.
It's perhaps a bit early to say the problem is no longer present under 2.6.36, but at least it looks better.