diff options
Diffstat (limited to 'Notes')
| -rw-r--r-- | Notes | 30 |
1 files changed, 18 insertions, 12 deletions
@@ -80,16 +80,22 @@ trap() ought to lgdt on return, since currently only done in swtch() protect hardware interrupt vectors from user INT instructions? -i'm getting a curious interrupt when jumping into user space. maybe -it's IRQ 0, but it comes at a weird and changing vector (e.g. 119) if -you don't initialize the PIC. why doesn't jos see this? if i -initialize the PIC with IRQ_OFFSET 32, the interrupt arrives at vector -32. - test out-of-fd cases for creating pipe. -test pipe circular buffer -test pipe writer or reader closes while other active or waiting -test exit vs fd reference counts -test write of more than PIPESIZE -test reader goes first vs writer goes first -test streaming of a lot of data +test pipe reader closes then write +test two readers, two writers. +test children being inherited by grandparent &c + +kill + sleep()ing for something + running at user level + running in kernel + ooh, the relevant CPU may never get a clock interrupt + should each cpu have its own clock? + where to check? + loops around sleep() + return from any trap + rules about being killed deep inside a system call + test above cases + +cli/sti in acquire/release should nest! + in case you acquire two locks |