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mount_xmemfs


NAME
     mount_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     xmemfs is obsolete.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 phy-
     sical 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  attri-
     butes  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 neverthe-
     less.

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 sys-
                         tem. If the sz argument has a k  suffix,
                         the  number is interpreted as kilobytes.
                         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 sup-
                         ports 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 sys-
         tem 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  sys-
                                     tems



ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:








     ____________________________________________________________
    | ATTRIBUTE TYPE              | ATTRIBUTE VALUE             |
    |_____________________________|_____________________________|
    | Availability                | SUNWcsu                     |
    |_____________________________|_____________________________|
    | Architecture                | i386                        |
    |_____________________________|_____________________________|
    | Interface Stability         | Obsolete                    |
    |_____________________________|_____________________________|


SEE ALSO
     mount(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  supported.  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.










Man pages from Solaris 10 Update 8. See docs.sun.com and www.oracle.com for further documentation and Solaris information.
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