Proc sys fs file nr

Ask Question. Asked 8 years, 10 months ago. Active 6 years, 11 months ago. Viewed 14k times. Improve this question. Add a comment. Active Oldest Votes.

The name of each subdirectory is the numerical thread ID [tid] of the thread see gettid 2. I suppose that they are created by fork ed child processes: man fork : The child inherits copies of the parent's set of open file descriptors. Improve this answer. See the first answer here: unix.

The kernel recycles these file handles instead. And the explanation give seems sound to me. SkoMine SkoMine 31 1 1 bronze badge.

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Linux 2. This denotes the maximum number of file-handles a process can allocate. The value in inode-max denotes the maximum number of inode handlers. This value should be times larger than the value in file-max, since stdin, stdout and network sockets also need an inode struct to handle them. When you regularly run out of inodes, you need to increase this value.

Inode-state contains three actual numbers and four dummies. When one of these filesystems is mounted with writes enabled, any UID or GID that would exceed is translated to a fixed value before being written to disk. Maximum total number of pages a non-privileged user may allocate for pipes.

Once this limit is reached, no new pipes may be allocated until usage goes below the limit again. When set to 0, no limit is applied, which is the default setting.

Maximum total number of pages a non-privileged user may allocate for pipes before the pipe size gets limited to a single page.

Once this limit is reached, new pipes will be limited to a single page in size for this user in order to limit total memory usage, and trying to increase them using fcntl will be denied until usage goes below the limit again.

The default value allows to allocate up to pipes at their default size. When set to 0, no limit is applied. The intent of this protection is to avoid unintentional writes to an attacker-controlled FIFO, where a program expected to create a regular file. The common method of exploitation of this flaw is to cross privilege boundaries when following a given hardlink i. The common method of exploitation of this flaw is to cross privilege boundaries when following a given symlink i.

The modes are. Any process which has changed privilege levels or is execute only will not be dumped. The core dump is owned by the current user and no security is applied.

This is intended for system debugging situations only.