On Fri, Jan 15, 2010 at 10:37 PM, Artyom Tarasenko <atar4q...@googlemail.com> wrote: > Don't clear interrupts on disabling, because > * Sun4M_SystemArchitecture_edited2.pdf doesn't describe > that masking or un-masking IRQ shall clear pending ones. > > * Field tests also show that SPARCstation-20 doesn't > clear them.
Awesome work! > * The patch makes Solaris 2.5.1/2.6 boot ~1500 times > faster (~20 seconds instead of ~8 hours) Unfortunately there is some problem with the patch (or more likely there is some other bug that this uncovers), because all my Linux test now panic. NetBSD and OpenBSD are unaffected. For example, sparc-test: eth0: LANCE 52:54:00:12:34:56 esp0: no command in esp_handle() Kernel panic - not syncing: esp_handle: current_SC == penguin within interrupt! <0>Press L1-A to return to the boot prom The bug may be in ESP interrupt handling (or in the interrupt chain between ESP, DMA controller and interrupt controller) as the panic always happens in ESP probe.
