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authorEric W. Biederman <ebiederm@xmission.com>2006-11-08 17:44:51 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-11-08 18:29:24 -0800
commit13bb7e37e5081d03643e2bd64f3f5d21f32e7221 (patch)
treed7dc30aa8b7f852a3a8b264eb1822140d32f564c /Documentation
parent6c33eb39976b67628452ebc791834c7d590e545e (diff)
downloadlinux-linaro-stable-13bb7e37e5081d03643e2bd64f3f5d21f32e7221.tar.gz
[PATCH] sysctl: Undeprecate sys_sysctl
The basic issue is that despite have been deprecated and warned about as a very bad thing in the man pages since its inception there are a few real users of sys_sysctl. It was my assumption that because sysctl had been deprecated for all of 2.6 there would be no user space users by this point, so I initially gave sys_sysctl a very short deprecation period. Now that I know there are a few real users the only sane way to proceed with deprecation is to push the time limit out to a year or two work and work with distributions that have big testing pools like fedora core to find these last remaining users. Which means that the sys_sysctl interface needs to be maintained in the meantime. Since I have provided a technical measure that allows us to add new sysctl entries without reserving more binary numbers I believe that is enough to fix the sys_sysctl binary interface maintenance problems, because there is no longer a need to change the binary interface at all. Since the sys_sysctl implementation needs to stay around for a while and the worst of the maintenance issues that caused us to occasionally break the ABI have been addressed I don't see any advantage in continuing with the removal of sys_sysctl. So instead of merely increasing the deprecation period this patch removes the deprecation of sys_sysctl and modifies the kernel to compile the code in by default. With committing to maintain sys_sysctl we get all of the advantages of a fast interface for anything that needs it. Currently sys_sysctl is about 5x faster than /proc/sys, for the same string data. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/feature-removal-schedule.txt12
1 files changed, 0 insertions, 12 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 1ac3c74646e3..d52c4aaaf17f 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -53,18 +53,6 @@ Who: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
---------------------------
-What: sys_sysctl
-When: January 2007
-Why: The same information is available through /proc/sys and that is the
- interface user space prefers to use. And there do not appear to be
- any existing user in user space of sys_sysctl. The additional
- maintenance overhead of keeping a set of binary names gets
- in the way of doing a good job of maintaining this interface.
-
-Who: Eric Biederman <ebiederm@xmission.com>
-
----------------------------
-
What: PCMCIA control ioctl (needed for pcmcia-cs [cardmgr, cardctl])
When: November 2005
Files: drivers/pcmcia/: pcmcia_ioctl.c