https://www.dragonflydigest.com/2012/09/13/experimental-pmap-optimizations/ A running description of activity related to DragonFly BSD. Mon, 17 Sep 2012 16:13:24 +0000 hourly 1 https://wordpress.org/?v=6.9.4 https://www.dragonflydigest.com/2012/09/13/experimental-pmap-optimizations/comment-page-1/#comment-45317 Mon, 17 Sep 2012 16:13:24 +0000 http://www.shiningsilence.com/dbsdlog/?p=10364#comment-45317 No, you’re probably right. I recall that memory faults are much more ‘lightweight’ on BSD than on Linux, but I’d feel a lot better if I could find the source for that thought.

]]> https://www.dragonflydigest.com/2012/09/13/experimental-pmap-optimizations/comment-page-1/#comment-45308 Mon, 17 Sep 2012 09:51:46 +0000 http://www.shiningsilence.com/dbsdlog/?p=10364#comment-45308 I thought a page fault, on both Linux and BSD, was a request for a page that exists in virtual memory but not loaded in real memory — i.e. it’s swapped out. And indeed it is normal on both BSD and Linux, but it is not a request for “more memory space” — it is request for a memory page that has already been allocated but, probably, not used in a while. Or does it mean something different in BSD?

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