Re: 2.6.21-rc1: known regressions (v2) (part 2)

[Thomas Gleixner]

Adrian,

On Mon, 2007-02-26 at 23:05 +0100, Adrian Bunk wrote:
> Subject    : kernel BUG at kernel/time/tick-sched.c:168  (CONFIG_NO_HZ)
> References : http://lkml.org/lkml/2007/2/16/346
> Submitter  : Michal Piotrowski <michal.k.k.piotrowski@xxxxxxxxx>
> Handled-By : Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Status     : problem is being debugged

The BUG_ON() was replaced by a warning printk(). The BUG_ON() exposed a
problem with the SMT scheduler. See below.

> Subject    : BUG: soft lockup detected on CPU#0
>              NOHZ: local_softirq_pending 20  (SMT scheduler)
> References : http://lkml.org/lkml/2007/2/20/257
> Submitter  : Michal Piotrowski <michal.k.k.piotrowski@xxxxxxxxx>
> Handled-By : Thomas Gleixner <tglx@xxxxxxxxxxxxx>
>              Ingo Molnar <mingo@xxxxxxx>
> Status     : problem is being debugged

Patch available, not confirmed yet.

	tglx


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