The patch titled Subject: ipc/mqueue: switch back to using non-max values on create has been added to the -mm tree. Its filename is ipc-mqueue-switch-back-to-using-non-max-values-on-create.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ From: Doug Ledford <dledford@xxxxxxxxxx> Subject: ipc/mqueue: switch back to using non-max values on create Commit b231cca4381ee15e ("message queues: increase range limits") changed how we create a queue that does not include an attr struct passed to open so that it creates the queue with whatever the maximum values are. However, if the admin has set the maximums to allow flexibility in creating a queue (aka, both a large size and large queue are allowed, but combined they create a queue too large for the RLIMIT_MSGQUEUE of the user), then attempts to create a queue without an attr struct will fail. Switch back to using acceptable defaults regardless of what the maximums are. Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx> Cc: Amerigo Wang <amwang@xxxxxxxxxx> Cc: Serge E. Hallyn <serue@xxxxxxxxxx> Cc: Joe Korty <joe.korty@xxxxxxxx> Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxx> --- include/linux/ipc_namespace.h | 2 ++ ipc/mqueue.c | 5 +++-- 2 files changed, 5 insertions(+), 2 deletions(-) diff -puN include/linux/ipc_namespace.h~ipc-mqueue-switch-back-to-using-non-max-values-on-create include/linux/ipc_namespace.h --- a/include/linux/ipc_namespace.h~ipc-mqueue-switch-back-to-using-non-max-values-on-create +++ a/include/linux/ipc_namespace.h @@ -95,9 +95,11 @@ extern int mq_init_ns(struct ipc_namespa #define DFLT_QUEUESMAX 256 /* max number of message queues */ #define HARD_QUEUESMAX 1024 #define MIN_MSGMAX 1 +#define DFLT_MSG 10U #define DFLT_MSGMAX 10 /* max number of messages in each queue */ #define HARD_MSGMAX (32768*sizeof(void *)/4) #define MIN_MSGSIZEMAX 128 +#define DFLT_MSGSIZE 8192U #define DFLT_MSGSIZEMAX 8192 /* max message size */ #define HARD_MSGSIZEMAX (8192*128) #else diff -puN ipc/mqueue.c~ipc-mqueue-switch-back-to-using-non-max-values-on-create ipc/mqueue.c --- a/ipc/mqueue.c~ipc-mqueue-switch-back-to-using-non-max-values-on-create +++ a/ipc/mqueue.c @@ -142,8 +142,9 @@ static struct inode *mqueue_get_inode(st info->qsize = 0; info->user = NULL; /* set when all is ok */ memset(&info->attr, 0, sizeof(info->attr)); - info->attr.mq_maxmsg = ipc_ns->mq_msg_max; - info->attr.mq_msgsize = ipc_ns->mq_msgsize_max; + info->attr.mq_maxmsg = min(ipc_ns->mq_msg_max, DFLT_MSG); + info->attr.mq_msgsize = + min(ipc_ns->mq_msgsize_max, DFLT_MSGSIZE); if (attr) { info->attr.mq_maxmsg = attr->mq_maxmsg; info->attr.mq_msgsize = attr->mq_msgsize; _ Subject: Subject: ipc/mqueue: switch back to using non-max values on create Patches currently in -mm which might be from dledford@xxxxxxxxxx are linux-next.patch ipc-mqueue-cleanup-definition-names-and-locations.patch ipc-mqueue-switch-back-to-using-non-max-values-on-create.patch ipc-mqueue-enforce-hard-limits.patch ipc-mqueue-update-maximums-for-the-mqueue-subsystem.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html