From c736de60aed869df8a9aba512cdaf89e32545b00 Mon Sep 17 00:00:00 2001 From: WANG Cong Date: Wed, 2 Nov 2011 13:39:25 -0700 Subject: sysctl: make CONFIG_SYSCTL_SYSCALL default to n When I tried to send a patch to remove it, Andi told me we still need to keep compabitlies for old libc, so we can't remove this completely. Then just make it default to n and remove the doc from feature-removal-schedule.txt. Signed-off-by: WANG Cong Cc: Eric Biederman Cc: Andi Kleen Cc: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/feature-removal-schedule.txt | 35 ------------------------------ 1 file changed, 35 deletions(-) (limited to 'Documentation') diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 7c799fc5b88e..3d849122b5b1 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -133,41 +133,6 @@ Who: Pavel Machek --------------------------- -What: sys_sysctl -When: September 2010 -Option: CONFIG_SYSCTL_SYSCALL -Why: The same information is available in a more convenient from - /proc/sys, and none of the sysctl variables appear to be - important performance wise. - - Binary sysctls are a long standing source of subtle kernel - bugs and security issues. - - When I looked several months ago all I could find after - searching several distributions were 5 user space programs and - glibc (which falls back to /proc/sys) using this syscall. - - The man page for sysctl(2) documents it as unusable for user - space programs. - - sysctl(2) is not generally ABI compatible to a 32bit user - space application on a 64bit and a 32bit kernel. - - For the last several months the policy has been no new binary - sysctls and no one has put forward an argument to use them. - - Binary sysctls issues seem to keep happening appearing so - properly deprecating them (with a warning to user space) and a - 2 year grace warning period will mean eventually we can kill - them and end the pain. - - In the mean time individual binary sysctls can be dealt with - in a piecewise fashion. - -Who: Eric Biederman - ---------------------------- - What: /proc//oom_adj When: August 2012 Why: /proc//oom_adj allows userspace to influence the oom killer's -- cgit v1.2.1