Subject: [PATCH 0/2] ZERO PAGE again v3.
Date: Thursday 9th July 2009 03:24:28 UTC (over 7 years ago)
After v2 discussion, I felt that "Go" sign can be given if implemetaion is neat and tiny and overhead seems very small. Here is v3. In this version, - use pte_special() in vm_normal_page() All ZERO_PAGE check will go down to vm_normal_page() and check is done here. Some new flags in follow_page() and get_user_pages(). - per arch use-zero-page config is added. IIUC, archs which have _PAGE_SPECIAL is only x86, powerpc, s390. Because this patch make use of pte_special() check, config to use zero page is added and you can turn it off if necessary. I this patch, only x86 is turned on which I can test. Any comments are welcome. Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to [email protected] For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@example.com