Davidlohr Bueso f3713fd9cf ipc,mqueue: remove limits for the amount of system-wide queues ... Commit 93e6f119c0 ("ipc/mqueue: cleanup definition names and locations") added global hardcoded limits to the amount of message queues that can be created. While these limits are per-namespace, reality is that it ends up breaking userspace applications. Historically users have, at least in theory, been able to create up to INT_MAX queues, and limiting it to just 1024 is way too low and dramatic for some workloads and use cases. For instance, Madars reports: "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." Other affected users can be found in launchpad bug #1155695: https://bugs.launchpad.net/ubuntu/+source/manpages/+bug/1155695 Instead of increasing this limit, revert it entirely and fallback to the original way of dealing queue limits -- where once a user's resource limit is reached, and all memory is used, new queues cannot be created. Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Reported-by: Madars Vitolins <m@silodev.com> Acked-by: Doug Ledford <dledford@redhat.com> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: <stable@vger.kernel.org> [3.5+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-02-25 15:25:45 -08:00
..
compat_mq.c	ipc: whitespace cleanup	2014-01-27 21:02:39 -08:00
compat.c	ipc: fix compat msgrcv with negative msgtyp	2014-01-27 21:02:40 -08:00
ipc_sysctl.c	ipc: whitespace cleanup	2014-01-27 21:02:39 -08:00
ipcns_notifier.c
Makefile
mq_sysctl.c	ipc,mqueue: remove limits for the amount of system-wide queues	2014-02-25 15:25:45 -08:00
mqueue.c	ipc,mqueue: remove limits for the amount of system-wide queues	2014-02-25 15:25:45 -08:00
msg.c	ipc,msg: document barriers	2014-01-27 21:02:40 -08:00
msgutil.c
namespace.c
sem.c	ipc: remove braces for single statements	2014-01-27 21:02:39 -08:00
shm.c	ipc: standardize code comments	2014-01-27 21:02:39 -08:00
syscall.c
util.c	ipc: delete seq_max field in struct ipc_ids	2014-01-27 21:02:40 -08:00
util.h	ipc: delete seq_max field in struct ipc_ids	2014-01-27 21:02:40 -08:00