Eric W. Biederman writes:
Badari Pulavarty <[email protected]> writes:
Your recent cleanup to shm code, namely
[PATCH] shm: make sysv ipc shared memory use stacked files
took away one of the debugging feature for shm segments.
Originally, shmid were forced to be the inode numbers and
they show up in /proc/pid/maps for the process which mapped
this shared memory segments (vma listing). That way, its easy
to find out who all mapped this shared memory segment. Your
patchset, took away the inode# setting. So, we can't easily
match the shmem segments to /proc/pid/maps easily. (It was
really useful in tracking down a customer problem recently).
Is this done deliberately ? Anything wrong in setting this back ?
Theoretically it makes the stacked file concept more brittle,
because it means the lower layers can't care about their inode
number.
We do need something to tie these things together.
So I suspect what makes most sense is to simply rename the
dentry SYSVID<segmentid>
Please stop breaking things in /proc. The pmap command relys
on the old behavior. It's time to revert. Put back the segment ID
where it belongs, and leave the key where it belongs too.
Containers are NOT worth breaking our ABIs left and right.
We don't need to leap off that bridge just because Solaris did,
unless you can explain why complexity and bloat are desirable.
We already have SE Linux, chroot, KVM, and several more!
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
