Doug Ledford 5b5c4d1a14 ipc/mqueue: update maximums for the mqueue subsystem ... Commit b231cca438 ("message queues: increase range limits") changed the maximum size of a message in a message queue from INT_MAX to 8192*128. Unfortunately, we had customers that relied on a size much larger than 8192*128 on their production systems. After reviewing POSIX, we found that it is silent on the maximum message size. We did find a couple other areas in which it was not silent. Fix up the mqueue maximums so that the customer's system can continue to work, and document both the POSIX and real world requirements in ipc_namespace.h so that we don't have this issue crop back up. Also, commit 9cf18e1dd7 ("ipc: HARD_MSGMAX should be higher not lower on 64bit") fiddled with HARD_MSGMAX without realizing that the number was intentionally in place to limit the msg queue depth to one that was small enough to kmalloc an array of pointers (hence why we divided 128k by sizeof(long)). If we wish to meet POSIX requirements, we have no choice but to change our allocation to a vmalloc instead (at least for the large queue size case). With that, it's possible to increase our allowed maximum to the POSIX requirements (or more if we choose). [sfr@canb.auug.org.au: using vmalloc requires including vmalloc.h] Signed-off-by: Doug Ledford <dledford@redhat.com> Cc: Serge E. Hallyn <serue@us.ibm.com> Cc: Amerigo Wang <amwang@redhat.com> Cc: Joe Korty <joe.korty@ccur.com> Cc: Jiri Slaby <jslaby@suse.cz> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-05-31 17:49:30 -07:00
..
acpi	ACPI: Add _PLD support	2012-05-11 17:03:12 -07:00
asm-generic	vsprintf: further optimize decimal conversion	2012-05-31 17:49:27 -07:00
crypto
drm	introduce SIZE_MAX	2012-05-31 17:49:26 -07:00
keys	KEYS: Permit in-place link replacement in keyring list	2012-05-11 10:56:56 +01:00
linux	ipc/mqueue: update maximums for the mqueue subsystem	2012-05-31 17:49:30 -07:00
math-emu
media	[media] patch for Asus My Cinema PS3-100 (1043:48cd)	2012-05-20 16:05:02 -03:00
memory
misc
mtd	UBI: amend commentaries WRT dtype	2012-05-20 20:25:59 +03:00
net	memcg: decrement static keys at real destroy time	2012-05-29 16:22:28 -07:00
pcmcia
rdma	Merge branches 'core', 'cxgb4', 'ipath', 'iser', 'lockdep', 'mlx4', 'nes', 'ocrdma', 'qib' and 'raw-qp' into for-linus	2012-05-21 09:00:47 -07:00
rxrpc
scsi	isci update for 3.5	2012-05-21 12:17:30 +01:00
sound	ASoC: Last minute updates	2012-05-22 02:58:55 +02:00
target	target: Add MI_REPORT_TARGET_PGS ext. header + implict_trans_secs attribute	2012-05-17 00:45:58 -07:00
trace	mm: vmscan: remove reclaim_mode_t	2012-05-29 16:22:19 -07:00
video	arm-soc: First batch of cleanups	2012-05-22 09:23:24 -07:00
xen	xen: do not map the same GSI twice in PVHVM guests.	2012-05-21 14:11:36 -04:00
Kbuild