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author | Robin Holt <holt@sgi.com> | 2013-05-01 02:15:54 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-08 03:08:23 (GMT) |
commit | 870ef91261887958df8b91a14386bd9fc4485325 (patch) | |
tree | e1ef9ba3e75842d7d75d65698b7d28b37dd76d23 /include | |
parent | 8aba4976abb99ae093cc8d74976164be487a93a5 (diff) | |
download | linux-fsl-qoriq-870ef91261887958df8b91a14386bd9fc4485325.tar.xz |
ipc: sysv shared memory limited to 8TiB
commit d69f3bad4675ac519d41ca2b11e1c00ca115cecd upstream.
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;
[akpm@linux-foundation.org: make ipc/shm.c:newseg()'s numpages size_t, not int]
Signed-off-by: Robin Holt <holt@sgi.com>
Reported-by: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 ae221a7..c4d870b 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() |