Rob Landley wrote:
On Saturday 01 September 2007 5:16:03 pm Andi Kleen wrote:
Rob Landley <[email protected]> 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
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