On Monday, 11 of February 2008, Alessandro Suardi wrote: > On Feb 9, 2008 6:10 PM, Alessandro Suardi <[EMAIL PROTECTED]> wrote: > > I finally had a bit of time to try out different kernel versions to find > > out where this began... and it's in 2.6.24-git2. > > > > What happens: Oracle 11g starts up and forks a number of so > > called background processes. Starting in 2.6.24-git2 the VKTM > > process never fully completes its initialization but gets in R state, > > never accumulating CPU, and can't be straced/gdb'd/killed. > > > > Sysrq-T reports for VKTM looks like this > > > > Feb 9 16:10:46 sandman kernel: ======================= > > Feb 9 16:10:46 sandman kernel: oracle R running 2684 2258 1 > > Feb 9 16:10:46 sandman kernel: f591dfb0 00200086 f6bbc3c4 > > f6863cc0 c010547a 00000000 b794f62c b7b70600 > > Feb 9 16:10:46 sandman kernel: b79453dc f591d000 c0103caa > > b794f62c b7943708 b79453e4 b7b70600 b79453dc > > Feb 9 16:10:46 sandman kernel: bfb0dd5c b79500b0 0000007b > > 0000007b c0320000 ffffffff 0e072d7a 00000073 > > Feb 9 16:10:46 sandman kernel: Call Trace: > > Feb 9 16:10:46 sandman kernel: [<c010547a>] ? do_IRQ+0xac/0xc1 > > Feb 9 16:10:46 sandman kernel: [<c0103caa>] work_resched+0x5/0x16 > > Feb 9 16:10:46 sandman kernel: [<c0320000>] ? pci_setup+0xb3/0x104 > > Feb 9 16:10:46 sandman kernel: ======================= > > > > > > 2.6.24-git1 is okay > > 2.6.24-git2 is bad > > ... > > 2.6.24-git20 is bad > > > > Only differences in kernel .config between -git1 and -git2 are > > > > [EMAIL PROTECTED] src]$ diff .config-2.6.24-git[12] > > 3,4c3,4 > > < # Linux kernel version: 2.6.24-git1 > > < # Sat Jan 26 01:04:43 2008 > > --- > > > # Linux kernel version: 2.6.24-git2 > > > # Sat Jan 26 12:10:15 2008 > > 121a122,123 > > > CONFIG_CLASSIC_RCU=y > > > # CONFIG_PREEMPT_RCU is not set > > 187a190 > > > # CONFIG_RCU_TRACE is not set > > 230a234 > > > # CONFIG_SCHED_HRTICK is not set > > 755a760 > > > # CONFIG_PATA_NINJA32 is not set > > 1807a1813 > > > # CONFIG_LATENCYTOP is not set > > > > Symptom is similar to what Rafael reported here > > > > http://www.ussg.iu.edu/hypermail/linux/kernel/0801.3/4114.html > > > > and similarly VKTM attempts to run at elevated priority as normal > > user process (Oracle kernel binary is not setuid root).
Yes, I think this is the same problem. Please try to unset CONFIG_GROUP_SCHED and see if that helps. > > Peter Zijlstra's patches mentioned in the above thread, at > > > > http://programming.kicks-ass.net/kernel-patches/sched-rt-group , > > > > do not appear to be in -git20 yet. > > > > > > I'm available for further testing. Thanks, ciao, > > Only to add that 2.6.25-rc1 is still broken. Yes, it is. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
