Pavel, We seem to have a memory leak. Its new in this patchset (i.e the following test ran fine on the 2.6.22-rc6-mm1 patchset). To repro: run "pidns_exec ./mypid" in a tight-loop - where mypid.c is: #include <stdio.h> #include <unistd.h> main() { printf("Pid %d, Ppid %d, Pgid %d, Sid %d\n", getpid(), getppid(), getpgid(0), getsid(0)); } I ran into OOM in about 30 mins. I am still investigating. BTW, can we include a simple test program like the pidns_exec in this patch-0 for whoever want to play with pidns ? Suka Pavel Emelianov [xemul@xxxxxxxxxx] wrote: | (Comment is taken from Sukadev's patchset-v3) | | A pid namespace is a "view" of a particular set of tasks on the system. | They work in a similar way to filesystem namespaces. A file (or a process) | can be accessed in multiple namespaces, but it may have a different name | in each. In a filesystem, this name might be /etc/passwd in one namespace, | but /chroot/etc/passwd in another. | | For processes, a process may have pid 1234 in one namespace, but be pid 1 | in another. This allows new pid namespaces to have basically arbitrary | pids, and not have to worry about what pids exist in other namespaces. | This is essential for checkpoint/restart where a restarted process's pid | might collide with an existing process on the system's pid. | | In this particular implementation, pid namespaces have a parent-child | relationship, just like processes. A process in a pid namespace may see | all of the processes in the same namespace, as well as all of the processes | in all of the namespaces which are children of its namespace. Processes may | not, however, see others which are in their parent's namespace, but not in | their own. The same goes for sibling namespaces. | | This set is based on my patches, I sent before, but it includes some | comments | and patches that I received from Sukadev. Sukadev, please, add your | Acked-by, | Signed-off-by or From, to patches you want (everybody is also welcome :) ). | | The set is based on 2.6.23-rc1-mm1, which already has some preparation | patches | for pid namespaces. After the review and fixing all the comments, this set | will be benchmarked and sent to Andrew for inclusion in -mm tree. | | Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxx> | Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxx> _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers