In the last round of cleaning up the pid hash table a more
general struct pid was introduced, that can be referenced
counted.
With the more general struct pid most if not all places where
we store a pid_t we can now store a struct pid * and remove
the need for a hash table lookup, and avoid any possible problems
with pid roll over.
Looking forward to the pid namespaces struct pid * gives us
an absolute form a pid so we can compare and use them without
caring which pid namespace we are in.
This patchset introduces the infrastructure needed to use
struct pid instead of pid_t, and then it goes on to convert
two different kernel users that currently store a pid_t value.
There are a lot more places to go but this is enough to get the
basic idea.
Before we can merge a pid namespace patch all of the kernel pid_t
users need to be examined. Those that deal with user space processes
need to be converted to using a struct pid *. Those that deal with
kernel processes need to converted to using the kthread api. A rare
few that only use their current processes pid values get to be left
alone.
Eric
-
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]
