Lee,
Lee Schermerhorn wrote:
Add [minimal?] discussion of mode flags to mbind(2).
I can make the changes required below, if you'd just clarify/ACK.
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@xxxxxx>
man2/mbind.2 | 45 ++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 44 insertions(+), 1 deletion(-)
Index: man-pages-3.05/man2/mbind.2
===================================================================
--- man-pages-3.05.orig/man2/mbind.2 2008-07-29 16:52:23.000000000 -0400
+++ man-pages-3.05/man2/mbind.2 2008-07-29 16:53:48.000000000 -0400
@@ -120,6 +120,30 @@ require the caller to specify via the
argument,
the node or nodes to which the mode applies.
+The
+.I mode
+argument may also include an optional
+.IR "mode flag ".
+The supported
+.I "mode flags"
+are:
+.TP
+.B MPOL_F_STATIC_NODES
Kernel 2.6.26, right?
+A non-empty
+.I nodemask
+specifies physical node ids.
+Linux does will not remap the
+.I nodemask
+when the task moves to a different cpuset context,
task? --> thread/ process.
+nor when the set of nodes allowed by the task's
See previous.
+current cpuset context changes.
+.TP
+.B MPOL_F_RELATIVE_NODES
Kernel 2.6.26, right?
+A non-empty
+.I nodemask
+specifies node ids that are relative to the set of
+node ids allowed by the task's current cpuset.
task? --> thread/ process.
+.PP
.I nodemask
points to a bitmask of nodes containing up to
.I maxnode
@@ -139,11 +163,24 @@ is zero,
the
.I nodemask
argument is ignored.
+
Where a
.I nodemask
is required, it must contain at least one node that is on-line,
-allowed by the process' current cpuset context,
+allowed by the task's current cpuset context
+[unless the
+.B MPOL_F_STATIC_NODES
+mode flag is specified],
and contains memory.
+If the
+.B MPOL_F_STATIC_NODES
+is set in
+.I mode
+and a required
+.I nodemask
+contains no nodes that are allowed by the task's current cpuset context,
+the memory policy reverts to
+.IR "local allocation" .
The
.B MPOL_DEFAULT
@@ -319,6 +356,12 @@ Or, none of the node IDs specified by
.I nodemask
are on-line and allowed by the process' current cpuset context,
or none of the specified nodes contain memory.
+Or, the
+.I mode
+argument specified both
+.B MPOL_F_STATIC_NODES
+and
+.BR MPOL_F_RELATIVE_NODES .
.TP
.B EIO
.B MPOL_MF_STRICT
Cheers,
Michael
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
man-pages online: http://www.kernel.org/doc/man-pages/online_pages.html
Found a bug? http://www.kernel.org/doc/man-pages/reporting_bugs.html
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