mirror of https://github.com/mkerrisk/man-pages
Added MPOL_MF_MOVE and MPOL_MF_MOVE_ALL descriptions,
from numactl-0.9.2 man page. Plus a few other smaller fixes.
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man2/mbind.2
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man2/mbind.2
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@ -117,6 +117,35 @@ if the existing pages in the mapping don't follow the policy.
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In 2.6.16 or later the kernel will also try to move pages
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to the requested node with this flag.
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If
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.B MPOL_MF_MOVE
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is passed in
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.IR flags ,
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then an attempt will be made to
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move all the pages in the mapping so that they follow the policy.
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Pages that are shared with other processes are not moved.
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If
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.B MPOL_MF_STRICT
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is also specified, then the call will fail with the error
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.B EIO
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if some pages could not be moved.
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If
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.B MPOL_MF_MOVE_ALL
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is passed in
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.IR flags ,
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then all pages in the mapping will be moved regardless of whether
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other processes use the pages.
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The calling process must be privileged
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.RB ( CAP_SYS_RESOURCE )
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.\" FIXME This may yet be changed to CAP_SYS_NICE in 2.6.16.
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to use this flag.
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If
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.B MPOL_MF_STRICT
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is also specified, then the call will fail with the error
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.B EIO
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if some pages could not be moved.
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.\" FIXME 2.6.16-rc1 adds MPOL_MF_MOVE and MPOL_MF_MOVE_ALL.
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.\" These will need to be documented
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.SH RETURN VALUE
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@ -170,6 +199,9 @@ that does not follow the policy.
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.SH NOTES
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NUMA policy is not supported on file mappings.
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.B MPOL_MF_STRICT
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is ignored on huge page mappings right now.
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It is unfortunate that the same flag,
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.BR MPOL_DEFAULT ,
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has different effects for
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@ -203,9 +235,14 @@ Support for huge page policy was added with 2.6.16.
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For interleave policy to be effective on huge page mappings the
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policied memory needs to be tens of megabytes or larger.
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.B MPOL_MF_MOVE
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and
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.B MPOL_MF_MOVE_ALL
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are only available on Linux 2.6.16 and later.
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These system calls should not be used directy.
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Instead, the higher level interface provided by the
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.BR numa (3)
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h.BR numa (3)
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functions in the
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.I numactl
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package is recommended.
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