Hello! Any comments or concerns about this?
many thanks, Madars > Hi Folks, > > I have recently ported my multi-process application (like a classical open > system) which uses POSIX Queues as IPC to one of the latest Linux kernels, > and I have faced issue that number of maximum queues are dramatically > limited down to 1024 (see include/linux/ipc_namespace.h, #define > HARD_QUEUESMAX 1024). > > Previously the max number of queues was INT_MAX (on 64bit system was: > 2147483647). > > This update imposes bad limits on our multi-process application. As our > app uses approaches that each process opens its own set of queues (usually > something about 3-5 queues per process). In some scenarios we might run up > to 3000 processes or more (which of-course for linux is not a problem). > Thus we might need up to 9000 queues or more. All processes run under one > user. > > But now we have this limit, which limits our software down and we are > getting in trouble. We could patch the kernel manually, but not all > customers are capable of this and willing to do the patching. > > Thus I *kindly* ask you guys to increase this limit to something like 1M > queues or more (or to technical limit i.e. leave the same INT_MAX). If > user can screw up the system by setting or using maximums, let it leave to > the user. As it is doing system tuning and he is responsible for kernel > parameters. > > The kernel limit was introduced by: > - > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=93e6f119c0ce8a1bba6e81dc8dd97d67be360844 > > Also I see other people are claiming issues with this, see: > - https://bugs.launchpad.net/ubuntu/+source/manpages/+bug/1155695 - for > them some database software is not working after the kernel upgrade... > > Also I think that when people will upgrade from RHEL 5 or RHEL 6 to next > versions where this hard limit will be defined, I suspect that many will > claim problem about it... > > Thanks a lot in advance, > Madars Vitolins > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
