I posted a BUG notification on lkml and just thought I would throw it over here as well. Between 2.6.15 and 2.6.16 there was quite a bit of work to the aic79xx driver which seems to have inflicted a nasty bug when an external array is powered on. Scenario: 1. System running 2.6.16 or higher is up and running with an external SCSI array attached in a powered off state. 2. Power up the array. 3. Linux system locks up hard with the following BUG displayed on the console: scsi0: Someone reset channel A BUG: soft lockup detected on CPU#0! <c013258b> softlockup_tick+0x7f/0x8e <c011e6e4> update_process_times +0x35/0x57 <c0104eda> timer_interrupt+0x3d/0x60 <c0132698> handle_IRQ_event+0x21/0x4a <c0132739> __do_IRQ+0x78/0xcb <c0103eb5> do_IRQ+0x6b/0x7a <c0102c4a> common_interrupt+0x1a/0x20 <c02d3a2a> _spin_unlock_irqrestore+0xa/c <e08d0481> ahd_linux_isr+0x173/0x17f [aic79xx] <c0132698> handle_IRQ_event+0xa <c0132739> __do_IRQ+0x78/0xcb <c0103ea8> do_IRQ+0x5e/0x7a ======================= <c0102c4a> common_interrupt+0x1a/0x20 <c011b5bc> __do_softirq +0x2c/0x7d <c0103f8c> do_softirq+0x38/0x3f ======================= <c0103eba> do_IRQ+0x70/0x7a <c0102c4a> common_interrupt+0x1a/0x20 <c0101150> mwait_idle+0x1a/0x2a <c01010bf> cpu_idle+0x40/0x5c <c038c618> start_kernel+0x184/0x186 I have forwarded this information to the folks who posted the last changes to the driver in 2.6.16 If anyone else has the time/inclination/hardware, can they verify this for me? Sean
