|Summary:||2.6.35: cpu_idle bug report / on i7 870 cpu (x86_64)|
|Product:||Platform Specific/Hardware||Reporter:||Maciej Rutecki (maciej.rutecki)|
|Severity:||normal||CC:||alan, jpiszcz, maciej.rutecki, rjw|
|Bug Depends on:|
Description Maciej Rutecki 2010-08-11 14:10:10 UTC
Subject : 2.6.35: cpu_idle bug report / on i7 870 cpu (x86_64) Submitter : Justin Piszcz <email@example.com> Date : 2010-08-06 22:09 Message-ID : alpine.DEB.firstname.lastname@example.org References : http://marc.info/?l=linux-kernel&m=128113260904048&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.
Comment 1 Justin Piszcz 2010-09-21 08:36:46 UTC
Hi, Please close this bug for now, I have a case open with 3ware regarding the controllers that appear to be causing I/O lockups, when the tests were performed (w/cpu_idle), it turned out that I have cron jobs that run at certain times (rss2email) and when they run, they produce a certain kind of I/O that locks up the machine until the controller(s) reset with 2.6.35.x, with 2.6.34.x the problem does not occur. [ 593.967176] 3w-9xxx: scsi0: WARNING: (0x06:0x0037): Character ioctl (0x108) timed out, resetting card. [ 730.483812] 3w-9xxx: scsi0: WARNING: (0x06:0x0037): Character ioctl (0x108) timed out, resetting card.
Comment 2 Justin Piszcz 2010-09-21 09:11:10 UTC
http://forums.storagereview.com/index.php/topic/28920-3ware-9650se-controller-resets-under-load-on-linux/page__st__30__gopid__264286&#entry264286 It may be CPU related afterall according to this post that I found, I am going to test what he found and see if the 2.6.35.x kernel is stable with the options he recommends to be disabled.
Comment 3 Rafael J. Wysocki 2010-09-21 18:14:44 UTC
Well, failing with CONFIG_NOHZ is still a bug and the fact that it didn't occur with 2.6.34 means we've changed something that triggers it recently.