lkml.org 
[lkml]   [2007]   [Sep]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] sysctl: Deprecate sys_sysctl in a user space visible fashion.
Rob Landley wrote:
> On Saturday 01 September 2007 5:16:03 pm Andi Kleen wrote:
>> Rob Landley <rob@landley.net> writes:
>>> A lot of embedded people like to configure /proc out of the kernel for
>>> space reasons. This would make that noticeably more painful.
>> I had a patch for a sysctl_name(2) for this a long time ago.
>> If it was a serious issue that could be reintroduced.
>>
>> BTW sysctl(2) only needs to be quiet for a single sysctl used
>> by glibc.
>>
>> -Andi
>
> Yeah, I found it:
> http://lkml.org/lkml/2003/7/10/345
>
> I think that if /proc/sys could be broken out as a separate filesystem, and it
> was small and simple, the embedded people would probably be happy. Is your
> patch significantly smaller than such a filesystem would be? (Keeping in
> mind that the smallest thing you can do is run from initramfs, and I think
> that's pulling in libfs already...)
>

IMO, the big problem with /proc/sys (and, for that matter, /sys) is
mainly that they have to live in the process namespace, which is highly
awkward when one uses chroot().

One way to solve *that* might be a system call to get a file descriptor
to the root of sysfs or procsysfs which can be used with openat(). That
has its own perils, of course...

-hpa
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-09-02 11:01    [W:0.078 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site