Comment by ars
16 days ago
There is more to know, does the code special case this? Does it use the file name? Major minor number? Or does it actually read zero's from it and place them in memory?
16 days ago
There is more to know, does the code special case this? Does it use the file name? Major minor number? Or does it actually read zero's from it and place them in memory?
it wouldn't be too hard to look at the source for mmap and zero, but since the topic of this article is the removal of the mmap 'virtual function' in the file, that would have been a pretty good place to throw a zero-page allocation