...OTES The memfd_create () system call provides a simple alternative to manually mounting a tmpfs (5) filesystem and creating and opening a file in that filesystem. The primary pu…...annot be applied to locked pages, or VM_PFNMAP pages. In the initial implementation, only tmpfs (5) supported MADV_REMOVE ; but since Linux 3.5, any filesystem which supports th…...23, remap_file_pages () creates non-linear mappings only on in-memory filesystems such as tmpfs (5), hugetlbfs or ramfs. On filesystems with a backing store, remap_file_pages ()…...stem. Support for various filesystems was added as follows: • ext4 (Linux 3.15); • btrfs, tmpfs, and cifs (Linux 3.17); • xfs (Linux 4.0); • Support for many other filesystems w…...stem. Support for various filesystems was added as follows: • ext4 (Linux 3.15); • btrfs, tmpfs, and cifs (Linux 3.17); • xfs (Linux 4.0); • Support for many other filesystems w…...stem. Support for various filesystems was added as follows: • ext4 (Linux 3.15); • btrfs, tmpfs, and cifs (Linux 3.17); • xfs (Linux 4.0); • Support for many other filesystems w…...ath does not contain a valid swap signature or resides on an in-memory filesystem such as tmpfs (5). EINVAL (since Linux 3.4) ( swapon ()) An invalid flag value was specified in…...ath does not contain a valid swap signature or resides on an in-memory filesystem such as tmpfs (5). EINVAL (since Linux 3.4) ( swapon ()) An invalid flag value was specified in…...ce Linux 3.1) • OCFS (since Linux 3.2) • XFS (since Linux 3.5) • ext4 (since Linux 3.8) • tmpfs (5) (since Linux 3.8) • NFS (since Linux 3.18) • FUSE (since Linux 4.5) • GFS2 (s…...ad of up to 1 MiB. If the key payload is large enough, then it may be stored encrypted in tmpfs (which can be swapped out) rather than kernel memory. For further details on thes…...73717368 SYSFS_MAGIC 0x62656572 SYSV2_SUPER_MAGIC 0x012ff7b6 SYSV4_SUPER_MAGIC 0x012ff7b5 TMPFS_MAGIC 0x01021994 TRACEFS_MAGIC 0x74726163 UDF_SUPER_MAGIC 0x15013346 UFS_MAGIC 0x…...73717368 SYSFS_MAGIC 0x62656572 SYSV2_SUPER_MAGIC 0x012ff7b6 SYSV4_SUPER_MAGIC 0x012ff7b5 TMPFS_MAGIC 0x01021994 TRACEFS_MAGIC 0x74726163 UDF_SUPER_MAGIC 0x15013346 UFS_MAGIC 0x…...73717368 SYSFS_MAGIC 0x62656572 SYSV2_SUPER_MAGIC 0x012ff7b6 SYSV4_SUPER_MAGIC 0x012ff7b5 TMPFS_MAGIC 0x01021994 TRACEFS_MAGIC 0x74726163 UDF_SUPER_MAGIC 0x15013346 UFS_MAGIC 0x…...73717368 SYSFS_MAGIC 0x62656572 SYSV2_SUPER_MAGIC 0x012ff7b6 SYSV4_SUPER_MAGIC 0x012ff7b5 TMPFS_MAGIC 0x01021994 TRACEFS_MAGIC 0x74726163 UDF_SUPER_MAGIC 0x15013346 UFS_MAGIC 0x…...esystems: • XFS (since Linux 2.6.38) • ext4 (since Linux 3.0) • Btrfs (since Linux 3.7) • tmpfs (5) (since Linux 3.5) • gfs2 (5) (since Linux 4.16) Collapsing file space Specify…...rfd and pathname is not associated with a filesystem that supports fsid (e.g., fuse (4)). tmpfs (5) did not support fsid prior to Linux 5.13. This error can be returned only wit…...el are listed in /proc/filesystems (e.g., "btrfs", "ext4", "jfs", "xfs", "vfat", "fuse", "tmpfs", "cgroup", "proc", "mqueue", "nfs", "cifs", "iso9660"). Further types may become…map or unmap files or devices into memory NAME mmap, munmap - map or unmap files or devices into memory LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #include <sys/mman.h> voi…...-mapped lower and upper layers supported since Linux 5.19) • squashfs (since Linux 6.2) • tmpfs (since Linux 6.3) • cephfs (since Linux 6.7) • hugetlbfs (since Linux 6.9) • The …map or unmap files or devices into memory NAME mmap, munmap - map or unmap files or devices into memory LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #include <sys/mman.h> voi…