diff options
| -rw-r--r-- | Documentation/feature-removal-schedule.txt | 12 | ||||
| -rw-r--r-- | fs/hugetlbfs/inode.c | 13 |
2 files changed, 23 insertions, 2 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 5e02b83ac12b..ea7d1bdad34d 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -311,6 +311,18 @@ Who: Vlad Yasevich <vladislav.yasevich@hp.com> --------------------------- +What: Ability for non root users to shm_get hugetlb pages based on mlock + resource limits +When: 2.6.31 +Why: Non root users need to be part of /proc/sys/vm/hugetlb_shm_group or + have CAP_IPC_LOCK to be able to allocate shm segments backed by + huge pages. The mlock based rlimit check to allow shm hugetlb is + inconsistent with mmap based allocations. Hence it is being + deprecated. +Who: Ravikiran Thirumalai <kiran@scalex86.org> + +--------------------------- + What: CONFIG_THERMAL_HWMON When: January 2009 Why: This option was introduced just to allow older lm-sensors userspace diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index bc56df8ce001..23a3c76711e0 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -949,6 +949,7 @@ static int can_do_hugetlb_shm(void) struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag) { int error = -ENOMEM; + int unlock_shm = 0; struct file *file; struct inode *inode; struct dentry *dentry, *root; @@ -958,8 +959,14 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag) if (!hugetlbfs_vfsmount) return ERR_PTR(-ENOENT); - if (!can_do_hugetlb_shm()) - return ERR_PTR(-EPERM); + if (!can_do_hugetlb_shm()) { + if (user_shm_lock(size, user)) { + unlock_shm = 1; + WARN_ONCE(1, + "Using mlock ulimits for SHM_HUGETLB deprecated\n"); + } else + return ERR_PTR(-EPERM); + } root = hugetlbfs_vfsmount->mnt_root; quick_string.name = name; @@ -999,6 +1006,8 @@ out_inode: out_dentry: dput(dentry); out_shm_unlock: + if (unlock_shm) + user_shm_unlock(size, user); return ERR_PTR(error); } |