09-17-2011
Linux Page Sharing
Hi,
I have following doubts regarding page sharing in Linux (please also correct me if any of my assumptions are wrong),
1. In recent kernel KSM does the page sharing for user process' anonymous pages.
2. What about pages where the program text is stored ? are they shared between two unrelated processes (by unrelated i mean they have no parent/child/sibling relationship) ?.
3. Parent and child shares these pages when they are forked and didn't execute a new program.
The thing I really wanted to know is, if there are two processes which have no relationship between them but they have some pages with same content, then is it possible for the kernel to identify them and use a single copy.
( pages can be of text area,user's anon pages)
Please help with your inputs.
Thanks
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