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4 commits

Author SHA1 Message Date
Andreas Kling
0c5bbac86e Add an InterruptDisabler helper class and use that for kmalloc. 
The naive spinlock was not nearly enough to protect kmalloc from
reentrancy problems.

I don't want to deal with coming up with a fancy lock for kmalloc
right now, so I made an InterruptDisabler thingy instead.
It does CLI and then STI iff interrupts were previously enabled.
 2018-10-24 11:07:53 +02:00
Andreas Kling
a5caf7ca99 Make the kmalloc global stats variable volatile. 
I know I'm praying for cargo here, but this does fix a weird issue
where logging the sum_alloc and sum_free globals wouldn't display
symmetric values all the time.
 2018-10-24 01:04:06 +02:00
Andreas Kling
82dae8fc90 Add a kmalloc lock. This definitely reduces flakiness. 2018-10-24 00:51:19 +02:00
Andreas Kling
9396108034 Import the "gerbert" kernel I worked on earlier this year. 
It's a lot crappier than I remembered it. It's gonna need a lot of work.
 2018-10-16 11:02:00 +02:00