|To:||"Eric W. Biederman" <firstname.lastname@example.org>|
|Subject:||Re: [PATCH 0/59] Cleanup sysctl|
|From:||"H. Peter Anvin" <email@example.com>|
|Date:||Tue, 16 Jan 2007 08:53:19 -0800|
|Cc:||Andrew Morton <firstname.lastname@example.org>, email@example.com, Linux Containers <firstname.lastname@example.org>, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, James.Bottomley@SteelEye.com, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, codalist@TELEMANN.coda.cs.cmu.edu, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org|
|User-agent:||Thunderbird 126.96.36.199 (X11/20061219)|
Eric W. Biederman wrote:
- Removal of sys_sysctl support where people had used conflicting sysctl numbers. Trying to break glibc or other applications by changing the ABI is not cool. 9 instances of this in the kernel seems a little extreme.
It would be highly advantageous if we could have a file that acts as a central registry of architectural sysctl numbers *and have the numbers in the kernel derived from there*. As I've said before, I don't really think sys_sysctl is any worse than ad hoc system calls (sys_mips and the like), but the real problem is that there are architectural and non-archtectural numbers, and they're mixed in all over the place.
I think it would be fair to say that if they're not in <linux/sysctl.h> they're not architectural, but that doesn't resolve the counterpositive (are there sysctls in <linux/sysctl.h> which aren't architectural? From the looks of it, I would say yes.) Non-architectural sysctl numbers should not be exported to userspace, and should eventually be rejected by sys_sysctl.
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