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The extra second that jammed Linux

Name: The extra second that jammed Linux
Uploaded: 2026-10-27T09:05:16.000Z
Duration: 2 min 38 s
Channel: Himanshu Kukreja
Description: How the leap second added at midnight GMT on 30 June 2012 made Linux timers fire early or at once, spun CPUs at Reddit, Gawker and Mozilla, and why code that almost never runs is the riskiest code you have.

How the leap second added at midnight GMT on 30 June 2012 made Linux timers fire early or at once, spun CPUs at Reddit, Gawker and Mozilla, and why code that almost never runs is the riskiest code you have.

01 · One extra second

One extra second.

One extra second

Midnight GMT, as 30 June 2012 turns into 1 July.