Better linked-list traversal in BPF

Posted Mar 8, 2024 18:01 UTC (Fri) by Cyberax (✭ supporter ✭, #52523)
Parent article: Better linked-list traversal in BPF

So now they rediscovered runtime metering at backbranches, as WASM did years ago.

Better linked-list traversal in BPF

Posted Mar 8, 2024 22:42 UTC (Fri) by roc (subscriber, #30627) [Link]

Yes, and

> he suggested that the kernel may eventually implement a watchdog timer to simply interrupt programs that run for too long.

It's a long and winding path towards BPF being just a bad version of WebAssembly. (Bad because, among other reasons, it will be encrusted with all these different attempts to avoid just using a watchdog timer, which will have to be supported indefinitely.)

Better linked-list traversal in BPF

Posted Mar 8, 2024 22:47 UTC (Fri) by cytochrome (subscriber, #58718) [Link] (4 responses)

I was wondering when someone would bring up WASM.

Better linked-list traversal in BPF

Posted Mar 8, 2024 23:01 UTC (Fri) by Cyberax (✭ supporter ✭, #52523) [Link] (3 responses)

Me too. It should have been done about 5 years ago.

Better linked-list traversal in BPF

Posted Mar 9, 2024 0:02 UTC (Sat) by cytochrome (subscriber, #58718) [Link] (1 responses)

Close your eyes, and tap your heels together three times, and think to yourself, 'There's no place like WASM…'

Better linked-list traversal in BPF

Posted Mar 9, 2024 0:04 UTC (Sat) by Cyberax (✭ supporter ✭, #52523) [Link]

OK, I did this. Now my kernel transformed into NetBSD with Lua modules.

Please send help.

Better linked-list traversal in BPF

Posted Mar 10, 2024 11:12 UTC (Sun) by ballombe (subscriber, #9523) [Link]

What ? You are bringing WASM in about every other kernel posts