On Fri, Sep 18, 2009 at 7:46 AM, J. Lennard <lennar...@yahoo.com> wrote: > Hi list, > > First I'm sorry to write what may appear as a rant, but I hope it is not > considered so. I'm writing to express huge instability problems in Ubuntu > 9.04. I migrated from ubuntu 8.04 (386) to ubuntu 9.04 (amd64) using a simple > clean install. >
Mine freezes and eats a massive load of memory on x86-64. I use 'elevator=as' on the command line; something other than the I/O scheduler is broken, and CFQ triggers it MUCH more frequently (hours, sometimes minutes instead of DAYS) than anticipatory. Some freezes come back; some don't; the ones that come back can be triggered by hitting NumLock (sends a specific interrupt? Sysrq sends INT6, numlock should at most trigger a software driver internal state change...). Killing everything (MagicSys E) causes the disk to suddenly thrash, as whatever blocked path suddenly becomes free. This all indicates to me that somewhere exists a racey deadlock in the I/O system that can affect two or more processes, and that the schedulers each fault through that path. It's a kernel issue, I've raised it but let's see if 9.10 fixes the problem. I haven't been watching the kernel bug fix list. -- Ubuntu-devel-discuss mailing list Ubuntu-devel-discuss@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss
