mount_xmemfs(1M) System Administration Commands mount_xmemfs(1M)NAMEmount_xmemfs - mount xmemfs file systems
SYNOPSIS
mount -F xmemfs [generic_options] -o[largebsize,]size=sz [-O] special
mount_point
INTERFACE LEVEL
xmemfs is obsolete. Users requiring large physical memory should
migrate to 64-bit platform support.
DESCRIPTION
xmemfs is an extended memory file system which provides file system
semantics to manage and access large amounts of physical memory which
can exceed 4 GB in size.
mount attaches a xmemfs file system to the file system hierarchy at the
pathname location mount_point, which must already exist. If mount_point
has any contents prior to the mount operation, these remain hidden
until the file system is once again unmounted. The attributes (mode,
owner, and group) of the root of the xmemfs filesystem are inherited
from the underlying mount_point, provided that those attributes are
determinable. If not, the root's attributes are set to their default
values.
The special argument is not currently used by xmemfs but a placeholder,
(such as xmem), needs to be specified nevertheless.
OPTIONS
See mount(1M) for the list of supported generic_options.
-ospecific_options
Specify xmemfs file system specific options in a comma-separated
list with no intervening spaces. If invalid options are specified,
a warning message is printed and the invalid options are ignored.
The size=sz specific option is required.
The following options are available:
size=sz The sz argument specifies the desired size of this
particular xmemfs file system. If the sz argument
has a k suffix, the number is interpreted as kilo‐
bytes. An m suffix is interpreted as megabytes and
g is interpreted as gigabytes. A sz specified with
no suffix is interpreted as bytes.
In all cases, the actual size of the file system is
the number of bytes specified, rounded up to the
physical pagesize of the system or to the large
page size if largebsize is specified.
This specific_option is required.
largebsize If largebsize is specified, xmemfs uses the large
memory page size as the file system block size. On
IA32, the large memory page size with mmu36 which
supports PAE (Physical Address Extension) is 2 MB.
The large memory page size without mmu36/PAE is 4
MB. If there is no large page support, the file
system block size is PAGESIZE.
-O
Overlay mount. Allow the file system to be mounted over an existing
mount point, making the underlying file system inaccessible. If a
mount is attempted on a pre-existing mount point without setting
this flag, the mount fails, producing the error device busy.
FILES
/etc/mnttab table of mounted file systems
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ATTRIBUTE TYPE │ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWcsu │
├─────────────────────────────┼─────────────────────────────┤
│Architecture │i386 │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Obsolete │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmount(1M), mount(2), mkdir(2), open(2), umount(2), mnttab(4),
attributes(5),xmemfs(7FS)NOTES
If the directory on which a file system is to be mounted is a symbolic
link, the file system is mounted on the directory to which the symbolic
link refers, rather than on top of the symbolic link itself.
The only file types allowed on xmemfs are directories and regular
files. The execution of object files resident in xmemfs is not sup‐
ported. Execution is prevented by not allowing users to set execute
permissions on regular files.
Support for xmemfs may be removed in a future release of Solaris.
SunOS 5.10 7 Mar 2006 mount_xmemfs(1M)
