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authorEric W. Biederman <ebiederm@xmission.com>2007-06-16 10:16:16 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-16 13:16:16 -0700
commit9d66586f7723b73c5925c7c7819c260484627851 (patch)
tree616c3c01282e0ca82c59b1496c385cf1e2961564 /ipc
parent22741925d268e8479ef66312749bd8d96ed35365 (diff)
downloadlinaro-lsk-9d66586f7723b73c5925c7c7819c260484627851.tar.gz
shm: fix the filename of hugetlb sysv shared memory
Some user space tools need to identify SYSV shared memory when examining /proc/<pid>/maps. To do so they look for a block device with major zero, a dentry named SYSV<sysv key>, and having the minor of the internal sysv shared memory kernel mount. To help these tools and to make it easier for people just browsing /proc/<pid>/maps this patch modifies hugetlb sysv shared memory to use the SYSV<key> dentry naming convention. User space tools will still have to be aware that hugetlb sysv shared memory lives on a different internal kernel mount and so has a different block device minor number from the rest of sysv shared memory. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: Albert Cahalan <acahalan@gmail.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/shm.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/ipc/shm.c b/ipc/shm.c
index 047b823e6bf..0852f206d89 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -366,9 +366,10 @@ static int newseg (struct ipc_namespace *ns, key_t key, int shmflg, size_t size)
return error;
}
+ sprintf (name, "SYSV%08x", key);
if (shmflg & SHM_HUGETLB) {
- /* hugetlb_zero_setup takes care of mlock user accounting */
- file = hugetlb_zero_setup(size);
+ /* hugetlb_file_setup takes care of mlock user accounting */
+ file = hugetlb_file_setup(name, size);
shp->mlock_user = current->user;
} else {
int acctflag = VM_ACCOUNT;
@@ -379,7 +380,6 @@ static int newseg (struct ipc_namespace *ns, key_t key, int shmflg, size_t size)
if ((shmflg & SHM_NORESERVE) &&
sysctl_overcommit_memory != OVERCOMMIT_NEVER)
acctflag = 0;
- sprintf (name, "SYSV%08x", key);
file = shmem_file_setup(name, size, acctflag);
}
error = PTR_ERR(file);