X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Documentation%2Ffilesystems%2Ftmpfs.txt;h=222437efd75a8231751c83a9d68195364b22ad62;hb=83d1674a946141c3c59d430e96c224f7937e6158;hp=f9bcf9f4934af3b33adeb7870ac2fb5592570578;hpb=bf6ee0ae494596aaf311e8430684db85d1d2f25c;p=linux-2.6

diff --git a/Documentation/filesystems/tmpfs.txt b/Documentation/filesystems/tmpfs.txt
index f9bcf9f493..222437efd7 100644
--- a/Documentation/filesystems/tmpfs.txt
+++ b/Documentation/filesystems/tmpfs.txt
@@ -63,7 +63,7 @@ size:      The limit of allocated bytes for this tmpfs instance. The
 nr_blocks: The same as size, but in blocks of PAGE_CACHE_SIZE.
 nr_inodes: The maximum number of inodes for this instance. The default
            is half of the number of your physical RAM pages, or (on a
-           a machine with highmem) the number of lowmem RAM pages,
+           machine with highmem) the number of lowmem RAM pages,
            whichever is the lower.
 
 These parameters accept a suffix k, m or g for kilo, mega and giga and
@@ -92,12 +92,24 @@ NodeList format is a comma-separated list of decimal numbers and ranges,
 a range being two hyphen-separated decimal numbers, the smallest and
 largest node numbers in the range.  For example, mpol=bind:0-3,5,7,9-15
 
+NUMA memory allocation policies have optional flags that can be used in
+conjunction with their modes.  These optional flags can be specified
+when tmpfs is mounted by appending them to the mode before the NodeList.
+See Documentation/vm/numa_memory_policy.txt for a list of all available
+memory allocation policy mode flags.
+
+	=static		is equivalent to	MPOL_F_STATIC_NODES
+	=relative	is equivalent to	MPOL_F_RELATIVE_NODES
+
+For example, mpol=bind=static:NodeList, is the equivalent of an
+allocation policy of MPOL_BIND | MPOL_F_STATIC_NODES.
+
 Note that trying to mount a tmpfs with an mpol option will fail if the
 running kernel does not support NUMA; and will fail if its nodelist
-specifies a node >= MAX_NUMNODES.  If your system relies on that tmpfs
-being mounted, but from time to time runs a kernel built without NUMA
-capability (perhaps a safe recovery kernel), or configured to support
-fewer nodes, then it is advisable to omit the mpol option from automatic
+specifies a node which is not online.  If your system relies on that
+tmpfs being mounted, but from time to time runs a kernel built without
+NUMA capability (perhaps a safe recovery kernel), or with fewer nodes
+online, then it is advisable to omit the mpol option from automatic
 mount options.  It can be added later, when the tmpfs is already mounted
 on MountPoint, by 'mount -o remount,mpol=Policy:NodeList MountPoint'.
 
@@ -121,4 +133,4 @@ RAM/SWAP in 10240 inodes and it is only accessible by root.
 Author:
    Christoph Rohland <cr@sap.com>, 1.12.01
 Updated:
-   Hugh Dickins <hugh@veritas.com>, 19 February 2006
+   Hugh Dickins <hugh@veritas.com>, 4 June 2007