On Sat, Jan 16, 2010 at 8:47 AM, Blue Swirl <blauwir...@gmail.com> wrote: > On Sat, Jan 16, 2010 at 8:16 AM, Blue Swirl <blauwir...@gmail.com> wrote: >> 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. > > In fact the bug was that OpenBIOS didn't clear ESP interrupts after > issuing commands, so the IRQ line was left raised which confused > Linux. >
Thanks, applied. I fixed the OpenBIOS bug and updated images in pc-bios.
