> Hi, > > I just wanted to report a bug upstream that is affecting the latest > versions of at least both Fedora and Ubuntu. CPUs somehow lock up > under load, producing errors of the form "BUG: soft lockup - CPU#0 > stuck for 61s! [kswapd0:184]" > > The Fedora Bug report is here: > https://bugzilla.redhat.com/show_bug.cgi?id=649694 -- however you can > find lots of references to the error message on other distributions > (including Ubuntu) by googling "bug soft lockup cpu stuck". > > Lockups seem to happen on server-class hardware under heavy loads when > the machine is swapping. This can lead to the entire machine locking > up in some reported cases (although so far only individual CPUs seem > to have locked up in my case, not the entire machine). The point at > which the CPU hangs varies -- see the dmesg output I attached to the > Fedora bug report above. > > My machine is a 12-way Xeon X5680 system with ext3, AFS and XFS > filesystems (XFS is running on hardware RAID). Please let me know if > you need other info that would be helpful to diagnosing the problem. AFAIK, This isssue was already fixed by Mel. http://kerneltrap.org/mailarchive/linux-kernel/2010/10/27/4637977 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>