diff options
| author | Robin Holt <holt@sgi.com> | 2013-04-18 09:49:11 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-04-19 17:33:16 +1000 |
| commit | 3cbec77addfdd0f09bd0effcb3e97fba8448456b (patch) | |
| tree | 036b832398cf16e6ad4b2291f2058a894923e856 /include | |
| parent | 418b00eb2a998ad5ea859dff93a600bfb747b989 (diff) | |
ipc: sysv shared memory limited to 8TiB
Trying to run an application which was trying to put data into half of
memory using shmget(), we found that having a shmall value below 8EiB-8TiB
would prevent us from using anything more than 8TiB. By setting
kernel.shmall greater than 8EiB-8TiB would make the job work.
In the newseg() function, ns->shm_tot which, at 8TiB is INT_MAX.
ipc/shm.c:
458 static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
459 {
...
465 int numpages = (size + PAGE_SIZE -1) >> PAGE_SHIFT;
...
474 if (ns->shm_tot + numpages > ns->shm_ctlall)
475 return -ENOSPC;
Signed-off-by: Robin Holt <holt@sgi.com>
Reported-by: Alex Thorlton <athorlton@sgi.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ipc_namespace.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h index ae221a7b5092..c4d870b0d5e6 100644 --- a/include/linux/ipc_namespace.h +++ b/include/linux/ipc_namespace.h @@ -43,8 +43,8 @@ struct ipc_namespace { size_t shm_ctlmax; size_t shm_ctlall; + unsigned long shm_tot; int shm_ctlmni; - int shm_tot; /* * Defines whether IPC_RMID is forced for _all_ shm segments regardless * of shmctl() |