diff options
| -rw-r--r-- | fs/proc/base.c | 46 |
1 files changed, 22 insertions, 24 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 39a3d7c969c..aeaf0d0f2f5 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2255,27 +2255,6 @@ static const struct inode_operations proc_tgid_base_inode_operations = { .setattr = proc_setattr, }; -/** - * proc_flush_task - Remove dcache entries for @task from the /proc dcache. - * - * @task: task that should be flushed. - * - * Looks in the dcache for - * /proc/@pid - * /proc/@tgid/task/@pid - * if either directory is present flushes it and all of it'ts children - * from the dcache. - * - * It is safe and reasonable to cache /proc entries for a task until - * that task exits. After that they just clog up the dcache with - * useless entries, possibly causing useful dcache entries to be - * flushed instead. This routine is proved to flush those useless - * dcache entries at process exit time. - * - * NOTE: This routine is just an optimization so it does not guarantee - * that no dcache entries will exist at process exit time it - * just makes it very unlikely that any will persist. - */ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid) { struct dentry *dentry, *leader, *dir; @@ -2322,10 +2301,29 @@ out: return; } -/* - * when flushing dentries from proc one need to flush them from global +/** + * proc_flush_task - Remove dcache entries for @task from the /proc dcache. + * @task: task that should be flushed. + * + * When flushing dentries from proc, one needs to flush them from global * proc (proc_mnt) and from all the namespaces' procs this task was seen - * in. this call is supposed to make all this job. + * in. This call is supposed to do all of this job. + * + * Looks in the dcache for + * /proc/@pid + * /proc/@tgid/task/@pid + * if either directory is present flushes it and all of it'ts children + * from the dcache. + * + * It is safe and reasonable to cache /proc entries for a task until + * that task exits. After that they just clog up the dcache with + * useless entries, possibly causing useful dcache entries to be + * flushed instead. This routine is proved to flush those useless + * dcache entries at process exit time. + * + * NOTE: This routine is just an optimization so it does not guarantee + * that no dcache entries will exist at process exit time it + * just makes it very unlikely that any will persist. */ void proc_flush_task(struct task_struct *task) |