Not logged in
Log in now
Create an account
Subscribe to LWN
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
(Nearly) full tickless operation in 3.10
Adding a huge zero page
Posted Sep 27, 2012 7:00 UTC (Thu) by smurf (subscriber, #17840)
Posted Sep 27, 2012 7:32 UTC (Thu) by mti (subscriber, #5390)
My thinking is that this unintialized memory is not really read much until the first write so it is not performance critical. That assumption may of course be wrong. Btw, what programs are reading unintialized memory and why?
But on the other hand, if there is a lot of reading of this zeroed memory, wouldn't a single small page fit better in the cache, thus improving preformance?
Posted Sep 27, 2012 8:07 UTC (Thu) by justincormack (subscriber, #70439)
Posted Sep 27, 2012 9:07 UTC (Thu) by kiryl (subscriber, #41516)
Posted Oct 12, 2012 11:51 UTC (Fri) by etienne (subscriber, #25256)
Copyright © 2013, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds